Symetrix Product Catalog 1996
STEAM POWERED RADIO.COM
STEAM POWERED RADIO.COM
YMETRIX, INC. is a world leader in professional analog and digital audio signal processing. Our products are designed to the highest standards of audio quality, reliability, and ease of use. Located in
Lynnwood, WA, USA, we are a group of musicians, engineers, audiophiles, and support staff who
enjoy their work immensely. For example, our six man engineering team has a collective work history
of over 70 years with Symetrix and other professional audio companies. We shipped our first noise gate in
1976, almost 19 years ago! Over 100,000 units later, we can proudly say "Symetrix is in it for the long haul".
Our products have gained an international following from sound professionals doing business in recording,
broadcast, film & video post production, live sound, and installed systems. From major broadcast networks
to private project studios, Symetrix gear is working day in and day out to get the job done. Although our
customer base is broad, we're not side-tracked by trying to be all things to all people. We're focused on one
and only one discipline: digital and analog signal processing. Our products are manufactured in a modern,
automated state-of-the-art factory. We maintain complete control of all processes and components from initial
design through final test and shipment. This ensures that a customer who chooses Symetrix undoubtedly
receives the maximum in value for money spent.
What's in this catalog
.___~_,1;,;;;.;...._____This catalog contains inforrt:iation on our full line of professional products. We've provided detailed information including basic features, product descriptions, application suggestions and technical specifications for
all products including accessories. It is our intention to provide real world solutions to your audio needs.
While we have made every effort to make the information contained in the catalog as complete as possible,
we stand ready to provide answers to any additional questions you may have.
How to get more information
Our products are distributed throughout the world by a dedicated network of representatives, dealers and
distributors. In the US contact us at 1-206-787-3222 for applications information or the name of a Symetrix
dealer near you. Outside of the US you will most likely find Symetrix products distributed by one of the
companies listed on the inside back cover of this catalog. If your country is not included in the list, please call
or FAX our headquarters directly for information on how to obtain our products in your country.
Dane Butcher, President
OSymetrix
STEAM POWERED RADIO.COM
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 · USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 •e-mail: [email protected]
620 20 Bit AID Converter
20 bit quantization;
dither and noise shape
Quantizaci6n de 20 bits;
conformacion de oscilaci6n
de pequeiia amplitud y ruido.
Quantification 20 bit;
noise shape et dither.
20 Bit Quantisierung;
"Dither-" und "Noise Shaping".
Seven seconds profanity delay;
advanced DSP "time expand/
time squeeze" stereo, 14 kHz
bandwidth
Maximo tiempo de retardo de 7
segundos para supreslOn de
menzajes de oyentes que no se
desea que salgan al aire. DSP
avanzado "expansor de tlempo/
reductor de tiempo'; est!reo,
anchura de banda 14 kHz.
Delai d'inhibition (profanity)
de 7 secondes; DSP evolue,
expansion et compression
temporelle.
61 0 Broadcast Audio Delay
Spezial-Delay tor Rundfunkanwendungen zum Ausblenden unerwOnschter Programmpas-sagen;
Delayzelt max. 7.5 Sek-unden.
sukzessive Regelung der Delayzeit
(DSP kontrolliert, nicht wahmehmbar);
Stereo, 14 kHz Bandbreite.
601/602 Stereo
Digital Processors
Parametric EQ, dynamics
processing, delay; MIDI
Amlento dinamico,
delay; MIDI.
EQ parametrique, traitement
de dynamique, ligne de retard;
MIDI.
Automatic gain controller uses
system speakers to sense
ambient changes
Controlador automatico de
ganancia. Usa los altavoces
para detectar cambios en el
ambiente.
ContrOleur de gain automatique
utilise les haut-parleurs pour
detecter les changements de
niveau ambiant.
Automatic gain controller
uses microphone to sense
ambient changes
Controlador automatico de
ganancia. Usa micr6fono
para detectar cambios en
el ambiente.
ContrOleur de gain automatique
utilise deux microphones pour
detecter les changements de
niveau ambiant.
"Frequency conscious"
gating, instantaneous
attack time
Circuito "sensible a la
frecuencia". Tiempo de
ataque instantaneo.
Quadruple noise-gate/
expandeur selectif en frequence.
Temps d'attaque ex1r~mement
courts.
EQ; dynamisches Processing;
Delay; MIDI.
572 SPL Computer
Automatische Verstarkungsregelung abhangig von der
Umgebungslautstarke, Messung
iiber Systemlautsprecher.
571 SPL Computer
Automatische Verstarkungsregelung abhangig von der
Umgebungslautstarke, Messung
mil Sensing-Mikrofonen.
564E Quad Expander/Gate
Frequezabhangiges Gate,
schnelle Attackzeiten.
528E Voice Processor
Mic preamp, de-esser,
compressor, expander,
parametric EQ • all in one .
Previo de micro, de-esser,
compresor, expansor, EQ
parametrico-todo en uno.
Preampli micro, de-esseur,
compresseur, expandeur/gate,
parametrique 3 bandes.
Mic-Vorverstarker, De-Esser,
Kompressor, Expander,
parametrischer EO.
501 Peak-RMS
Compressor/Limiter
Procesamiento mono,
simultaneo de pico y RMS.
Single channel simultaneous
peak and RMS processing
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8 channel compressor/interface
for digital 8-track recorders
Compresor/ "interface" de
8 canales para grabadoras
de 8 pistas digitales.
Compresseur-limiteur mono,
traitement RMS et cr~te de
la modulation.
Gleichzeitiges Processing auf
Spitzen- und RMS-Werten.
488 DYNA-Squeeze™
Compresseur 8 canaux; permet
egalement d'interfacer les
enregistreurs 8 pistes.
8-Kanal Compressor/Interface
fiir digitale 8-Spur-Recorder.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA98037 • USA •Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
450 Mic/Line Mixer
Separate stereo and mono
ouput zones; 4 stereo Inputs,
2 mic inputs
Zonas de salida estereo y
mono separadas; 4 entradas
estereo, 2 entradas de micro.
425 Dual Compressor/
Limiter/Expander
Dual mono or stereo linked
operation
Sorties zones stereo et mono
separees; 4 entrees stereo,
2 entrees micro.
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Double compresseur-limiteur/
expandeur-gate, mode stereo
ou deux canaux independants.
Funciona conectado en
dual-mono o en estereo.
421 m AGC-Leveler
with Mic/Line Input
Reduces the level of loud
sounds, increases the level of
quiet sounds; mic or line input
Reduit le niveau des sons forts,
accroit le niveau des sons
faibles; entrees et sorties niveau
ligne stereo.
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20 W/canal a 8 Ohms.
o 40 W/mono a 8 Ohms.
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1 entrada, 2 salidas con retardo o delay de precisi6n para
altavoces dlstantes. Gama
dinamica superior a 100 dB.
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Automatische Verstarkungsregelung, Verstarkung von
kleinen Pegein und Abschwachung von hohen Pegein.
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Amplificateur stereo 2x20
Watts/8 ohms, 40 Watts mono
bridge at 8 ohms.
402 Dual Output Delay
One in, two out precision delay
of distant speakers; over 1OOdB
dynamic range
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Reduit le niveau des sons forts,
accroit le niveau des sons
faibles; entree micro ou ligne.
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20 watts/channel into 8 ohms
or 40 watts/mono into 8 ohms
Reduziert hohe Signalpegel,
hebt niedrige Pegel an;
Stereo-Ein- und Ausgange.
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Reduce el nivel de sonidos
altos, incrementa el nivel de
los sonidos bajos; entrada
mlcr6fono o lfnea.
420 Stereo Power Amplifier
Betrieb als dual-Mono oder
linked-Stereo moglich.
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Reduce el nivel de sonidos
altos, incrementa el nivel de
sonidos bajos; entradas y
salidas estereo.
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422 Stereo AGC-Leveler
Reduces the level of loud
sounds, increases the level of
quiet sounds; stereo inputs and
outputs
Getrennte Stereo- und
Mono-Ausgangszonen;
4 Stereo-Eingange,
2 Mikrofon- Eingange.
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•
Delai numerique 1 entre vers 2
sorties. Dynamique superieure
A100 dB. Coherence en phase
excellente.
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20W an 8 Ohm pro Kanai;
mono; 40W an 8 Ohm.
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1 Ein- und 2 Ausgange; prazise
Einstellung der Verzogerungszeit in ft, m, s; Ober 100 dB
Dynamikbereich.
SX208 Stereo Compressor/Limiter
Low cost, easy to use,
superb sound
Bajo costo, facil de usar,
extraordinario sonido.
Un rapport qualite/prix
imbattable pour des performances excellentes.
Preisgunstig; einfache
Handhabung; sauberer Klang.
Quatre sorties avec contrOles de
niveau individuels, entrees
mono ou stereo.
Stereo- oder Mono-Eingang;
Vier getrennt einstellbare
Ausgange.
SX204 Headphone Amplifier
Four outputs with individual
level controls, stereo or
mono Inputs
Cuatro salidas con controles
indivlduales del nivel, entradas
estereo o mono.
- 01- 01-
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SX202 Dual Microphone Preamp
Phantom power, 15 dB pads,
polarity reversal
Alimentaci6n Phantom. Atenuaci6n de 15 dB, inversi6n de
polaridad.
Double preampli micro, ou
melangeur 2·> 1 sortie ligne.
48V commutable, inversion
de phase, pad de 30 dB.
Phantomspeisung; 15 dBAbsenkung pro Kanai;
Polaritatsumschalter.
Egaliseur parametrique mono
3 bandes (-30/+15 dB, a 0,05
a3,3) + preampli micro.
Drei Oberlappende EQ-/
Notch-Filter mil Vorverstaker.
SX201 Parametric EQ/Preamp
Three overlapping EQ/notch
filter bands with preamp
OSymetrix
STEAM POWERED RADIO.COM
Tres bandas de EQ/notch
filter solapadas con previo.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 ·USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 · e-mail: [email protected]
620 20 Bit A/D Converter
ANT TO KNOW A SECRET? It's not a 16 bit world anymore. While it's true that your DAT recorder is
most likely 16 bit, your hard disk recorder/editor is probably 16 bit, your CD player is certainly 16 bit,
our ears (depending upon your age and the number of metal concerts you've been to), could well be
the 22 bit range! Transferring audio from the analog to the digital domain is a critical process - not to
be taken lightly if you strive for high quality output from your studio. If your recorder or workstation stores 16 bit
audio, you must make sure that your AID converter uses each and every one of those bits in the most effective way.
The converter must be greater than 16 bits and must incorporate intelligent dithering and noise shaping. If your ears
can hear more than 16 bits, there's no reason to continue with a 16 bit AID converter.
W
The Symetrix 620 is an outboard 20 bit AID converter
for faultless transitions between analog and digital
domains. If you're presently using a 16 bit recorder or
workstation, the 620's dither and noise shaping functions can markedly reduce your low level noise and
distortion. If you've already moved up to 20 bit equipment, then chances are good the 620 will provide a
clearly audible improvement over your internal AID
converters.
How exactly, can the 620 improve the sound of my 16
bit mixes?Although 16 bits can theoretically give you
96 dB of dynamic range, the fact remains that low level
signals are not well represented by the lower bits of a
16 bit word. One of the advantages of analog tape was
that low level audio could fall below the recorder's
noise floor and still be discernible. Not so with digital.
Undithered signals that fall below the digital 'quantization' level are lost and gone forever, covered over by
quantization noise. If your console boasts a 110 dB
dynamic range and you mix to a 16 bit DAT (even if it's
equipped with an 18 bit converter), your dynamic range
is reduced to 96 dB at best. Even if you feed your DAT
digitally from a 20 bit AID, the DAT will simply throw
away (truncate) the last four bits. No questions asked.
Our solution is to capture the detailed analog audio
(which in many cases has well over 11 OdB of dynamic
range) and intelligently process it into the 16 bit
storage medium. The 620 does this through use of
dither and noise shaping. The 620's dither algorithm
(016) improves the effective dynamic range of 16 bit
sounds (or 8 bit if you're working in multimedia), by
changing the characteristic of quantization noise from a
harsh, signal related distortion to a smooth hiss. The
016 algorithm is used when the signal is headed for
further digital domain processing such as editing,
compression, EQ, etc.
If you 're mixing to your final destination (such as DAT)
and your signal will undergo no further digital processing, select the NS16 algorithm which is a combination of dither and noise shaping. When converting from
20 to 16 bit resolution the 620's noise shaper moves
the quantization noise out of the midrange region where
the human ear is most sensitive. (See graphs on the
reverse of this page.)
What sets the 620 apart from the internal AID
converters that came with my equipment?
Lots of things. Most internal AID converters are 'bare
bones'. The 620 carefully integrates a 20 bit deltasigma IC with a powerful DSP processor to noise
shape, dither (technically re-dither) , downsample
(44.1 to 22.05 conversion) and remove DC in the digital
domain. While the advantages of the 620 are numerous, the bottom line is the sound. If you do sound for
a living, then do something nice for yourself. Call us at
one of the numbers below for more information and a
list of Symetrix 600 series dealers. We think you'll be
glad you did.
Features
• 20 bit quantization
• Selectable dither & noise shape
• Selectable output word size
• AES/EBU & SIP DIF In and out
• Real time sample rate conversion from
44.1 to 22.05 for multimedia
[email protected]
Symetrix Inc. • 14926 35th Ave. W. • Lynnwood, WA 98037 · USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: 10_
STEAM POWERED RADIO.COM
620 20 Bit A/D Converter
TYPICAL NW..00 CONNECTIONS:
PIN 1 • Sl£EVE • GA0UNO
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Specifications
Audio
Quantization
Analog Inputs
Maximum analog Input level
20 bits/sample
two, balanced bridging
+ 24 dBu, balanced
+16 dBu, unbalanced
Digital Inputs
AES/EBU and SIP DIF(Sony/Phillips)
Digital Outputs
AES/EBU and SIP DIF (Sony/Phillips)
Frequency Response
±.5dB, 20 Hz-20 kHz
THD+noise @ -60 dBFS (-38 dBu)
>104 dBFS
Dynamic Range
see graph below
[email protected],+22 dBu input
<-95 dB
Common mode rejection @1kHz, 1v RMS
>85 dB
Sample rates:
48 kHz, 44.1 kHz, 32 kHz, 22.05 kHz
Headroom LEDs:
-54 dBFS to OdbFS (clip)
Physical
Analog Inputs
XLR (pin 2 high) and ¼" tip-ring-sleeve
Digital Input & output connectors
XLR (AES/EBU) and
RCA pinjack (SIP DIF)
Chassis size
1.75"H x 19" W x 7.5" D
4.45cm H x 48.3cm W x 19.1cm D
Shipping weight
8 lbs, 3.64kg
Electrical
Power
Power Consumption
117V ac, nominal, 95-130V ac, 50-60Hz
230V ac,nominal, 165-255V ac, 50Hz
20 watts, maximum
In the interest of continuous product improvement, Symetrix, Inc. reserves the
right to alter, change, or modify these specifications without prior notice.
Copyright, 1995, Symetrix, Inc. All rights reserved.
Highlights
Non-polluting. No phosphates or distortion-causing
capacitors in the signal path. Audio pollution banished.
Instead of capacitors for DC removal, we annihilate DC
with a digital filter.
Safe for use in low noise environments. Dynamic
range? Look at the 20 bit FFT below. Noise in every bin
is better than 135 dB below full scale! Check out the 16
bit noise shape graph on the right. Is the 620 quiet
enoughforyourDAT?
SYMETAIX 620 2081T DIGITAL OUTPUT
AMP 1(d8FS) vs FREO(Hz)
31 JAN 95 08:23.50
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Dolphin Friendly. Logical, easy to use control panel.
Lots of LEDs to show you exactly what's happening at
all times. Batteries not included. The 620 doesn't need
batteries. All settings are stored in a nonvolatile
EEPROM.
Politically and aurally neutral. The 620 has no
association with any known political party, special
interest group, or trendy sound. That means you can
use it on any project without fear of recrimination.
SVMETAIX 620 1&BIT NOISE SHAPED OUTPUT Amp(d8FS) vs F,eq(Hz) 31 JAN 95 08:30:25
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Architects and Engineers Specifications
The analog to digital converter shall be a high performance unit occupying a single rack space (1 U).
The unit shall have two line level, balanced, analog inputs. Input gain shall
be controlled via two variable potentiometers over a 15dB range. Alternatively, a fixed input gain reference of +4dBu may be selected.
The AID converter shall provide a digital output signal conforming to the
AES/EBU digital audio format (AES-3) as well as a second digital output
conforming to the SIP DIF format (IEC-958).
The unit shall internally generate sample rates of 48kHz, 44.1kHz, 32kHz,
and 22.05kHz. When converting from analog to digital, the converter shall
quantize 20 bits.
GSymetrix
STEAM POWERED RADIO.COM
Means shall be provided to select the following output word formats: 20
bit, 16 bit dithered (using a triangular probability random noise generator), 16 bit noise shaped and dithered, 8 bit noise shaped, and 8 bit
dithered.
The AID converter shall provide means to accept incoming digital audio
signals at a44.1kHzsample rate and output the same signals at a22.05Hz
sample rate.
The AID converter shall be a Symetrix, Inc. model 620 20 bit AID
converter.
Symetrix Inc.• 14926 35th Ave . W. • Lynnwood, WA 98037 · USA · Tel: (206) 787-3222 • FAX: (206) 787-3211• e-mail: [email protected]
610 Broadcast Audio Delay
HE SYMETRIX 610 BROADCAST AUDIO DELAY gives the host or producer of a talk show the power to
prevent the broadcast of unwanted profanities or comments from telephone callers. As the program begins,
the 610 gradually and unobtrusively delays or 'stretches out' the program until 7.5 seconds of 15 kHz
bandwidth stereo audio is stored in memory. When a person on the telephone line says something the
host or producer does not think appropriate for the broadcast, he or she presses the 'DUMP PROFANITY' button
and the memory is cleared, thereby preventing the unwanted audio from reaching the airwaves. Meanwhile, the host
releases the offending caller from the telephone line and proceeds with the program. Once the 'DUMP PROFANITY'
button is pressed, the 610 automatically begins to stretch the program audio again until the full 7.5 second delay is
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attained.
Historically, broadcast delay lines have been implemented in a variety of fashions, from jerry-rigged
analog tape delays using tricky relay switching, to
extremely expensive digital units costing many thousands of dollars. The Symetrix 610 takes advantage of
the latest digital audio technology to bring to market a
product that is both simple to install and amazingly
easy for even the most nontechnical person to operate.
All of this, at a price that's within the budget of any
broadcast facility.
The advantages of installing a 610 in your facility are at
least twofold: 1) profanities and unwanted comments
and their accompanying liabilities are held at bay and
2) your station's talent, programming and engineering
staff can proceed to do their jobs with confidence and
peace of mind.
In a typical scenario, the 61 Ois installed following the
main program output of the mixing console. When the
show begins, the host or producer presses the 'START
DELAY' button. The 610 inserts imperceptible delays
into the program until a 7.5 second delay time has been
reached . As explained above, should an unwanted
comment occur, the 'DUMP PROFANITY' button is
pressed and 7.5 seconds of audio vanishes taking the
comment with it. The 610 automatically splices back
together every1hing except the 7.5 seconds which
contained the unwanted comment. Alternatively, the
610 can be set up so that only half of the 7.5 second
memory is deleted the first time the button is pushed,
thereby maintaining a 3.75 second reserve. This allows
the host to bring another caller on air right away
without having to wait for the memory to build up from
scratch - a great feature for fast moving shows! Just
prior to the end of the program the 'EXIT DELAY' button
is pushed. The 610 begins releasing memory gradually
until there is no delay and operation is in real time. It's
that simple.
As a bonus feature we've added a 'COUGH' button to
allow the host to make impromptu interruptions of the
program for up to 7.5 seconds while keeping the
audience unaware of the break. In this situation the
button is pushed and the 61 Oplays from memory while
the button is held in. As soon as the button is released,
the 610 automatically begins to refill the memory. The
host can cough, have a quick drink of water, or make a
comment to the producer or engineer without any
perceptible program interruption.
As with all Symetrix products the 610 Broadcast Audio
Delay is designed and constructed to the highest
broadcast industry standards. Our documentation and
customer support are second to none. If your station's
programming includes 'talk' and you want to operate
with confidence, then contact your favorite equipment
distributor for a demonstration of the 610 Broadcast
Audio Delay.
Features
• Advanced DSP 'time expand/time squeeze'
• Simple, fool-proof controls - easy to operate
• Remote control of all functions and Important
LED indicators
• 'Hardwire' relay bypass (failsafe)
• Bullet-proof & built to last
• Stereo, 14 kHz bandwidth
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 · USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
610 Broadcast Audio Delay
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Specifications
Audio
Inputs
Outputs
Maximum input level
Maximum output level
Frequency Response
Dynamic Range
Input common mode rejection
Physical
Stereo, balanced bridging
Stereo, electronically balanced
+22 @8dBu input setting
+22 dBu into 600 ohms
±.5dBu, 20 Hz-14 kHz
>80 dB
65 dB @1kHz
Input connectors
Output connectors
Polarity
Chassis size
Shipping weight
XLR
XLR
Pin 2 high
1.75'H x 19' Wx 7.5' D
4.45cm H x 48.3cm W x 19.1cm D
8 lbs, 3.64kg
Electrical
Power
Power Consumption
117V ac, nominal, 105-130V ac,50-60Hz
230Vac,nominal, 207-255Vac, 50Hz
15 watts, maximum
In the interest of continuous product improvement, Symetrix, Inc. reserves the
right to alter, change, or modify these specifications without prior notice.
Copyright 1995, Symetrix, Inc. All rights reserved.
Architects and Engineers Specifications
The Broadcast Audio Delay shall be a stereo model whose output is
delayed by as much as 7.5 seconds thereby allowing the operatorto delete
or 'dump' unwanted audio The Broadcast Audio Delay shall occupy one
rack space (1U).
The inputs shall be active balanced bridging designs terminated with 3pin XLR (AES/IEC standard wiring) female jacks.
The outputs shall be active balanced designs terminated with 3-pin XLR
(AES/IEC standard wiring) male jacks.
Overall frequency response shall be 20Hz to 14kHz, ±1 measured at
+4dBu output. There shall be no more than 0.1% harmonic distortion
measured under the following conditions: +4dBu input, +4dBm output,
7.5 second delay, 1OOOHztestfrequency. Dynamic range shall be>80 dB,
full scale, between the noise floor and maximum output level.
When the unit is inoperative (either by loss of power, or via the BYPASS
switch), the inputs and outputs shall be wired together.
The Broadcast Audio Delay shall be capable of operating by means of Its
own built-in power supply connected to 117V nominal AC (105 to 130V)
50/60 Hz and 230V nominal AC (207 to 253V AC).
The Broadcast Audio Delay shall be a Symetrix, Incorporated model 61 O
BROADCAST AUDIO DELAY.
OSymetrix
STEAM POWERED RADIO.COM
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 · USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 •e-mail: [email protected]
601 /602 Stereo Digital Processors
HE SYMETRIX 602 STEREO DIGITAL PROCESSOR and 601 DIGITAL VOICE PROCESSOR are digital
domain audio toolboxes, each providing three essential processing blocks in one user-friendly package:
parametric EQ, multi-dynamics processing, and time domain effects-all simultaneously. Designed for
studio and live sound professionals, the 601 and 602 feature digital (AES/EBU and S/PDIF) and analog
inputs and outputs, a dynamic range over 100 dB, and comprehensive real-time MIDI implementation.
T
The processing includes a three band parametric EQ
with peak/shelf and notch filtering, a compressor/
limiter, an AGC/leveler, a downward expander, dynamic
filter noise reduction, de-essing, and stereo digital
delay with modulation and feedback. "Glitch-free" nonzippering algorithms are coupled with seamless, onthe-fly editing and program changes. For example, as
you change programs there are no crossfades or
muting. Would you like to change EQ frequencies in the
middle of a take? No problem. The 601 and 602 do it
silently. A powerful dual-DSP engine was designed to
provide users with a digital tool that maintains the
purity of sound in the finest analog designs while
taking full advantage of digital programmability.
Choose from 128 read-only presets for voice, instruments and spatial manipulation or store your own
programs in 128 user locations. The read-only presets
range from subtle enhancement EQ curves with
complementary dynamics processing to full-blown
"Darth Vader" transmogrifications. Get up and running
instantly with the non-volatile presets then modify them
and store them as your own proprietary sound designs.
To protect your work, the entire contents of memory
can be easily dumped via MIDI to floppy or hard disk.
With the intuitive user interface even the novice user
can take command in a matter of minutes. You don't
have to navigate through a complex multi-layer menu
to operate a 601 or 602. We've incorporated a "one
button, one function" approach that offers instant
access to all major parameters and functions.
18-bit 64X oversampling AID converters and a 24-bit
internal data stream provide mastering quality audio
performance that will please the most discerning
"golden ear". 18-Bit Delta-Sigma D/A converters insure
high-frequency linearity and zero-phase error between
channels. Our stringent standards of circuit board
design have produced a product with over 100 dB
dynamic range. Go ahead and crank up the gain. Even
your low level signals will come shining through-no
whistles or birdies-just good, clean sound.
So what's the difference between the 601 and 602?
The 601 is equipped with a mic input (with phantom
power) and a line input and designed for postproduction, broadcast, or anywhere rack space and
convenience are paramount. The 602 has two line
inputs and no mic preamp and serves as a general
purpose mastering and studio processing tool,
however, its stereo analog inputs make it useful for a
wide range of tasks. Both units have stereo digital
inputs and outputs, stereo analog outputs, and identical
processing functions.
We have also developed the 601 /602 Librarian/
Controller software for Macintosh computers, which is
essentially an onscreen, click and drag, scroll bar
version of the units' front panels. The librarian feature
allows you to store your presets on the Mac, edit them
with the editor/controller, rename them, and move them
around in memory.
The 601 and 602 from Symetrix represent a milestone
in terms of signal processing power for money spent.
Taking the place of at least four separate signal
processing devices in your rack, they can increase your
studio's production efficiency and help you generate
better mixes. To see for yourself, contact your nearest
Symetrix dealer.
Features
• AES/EBU & S/PDIF stereo In and out
• Simultaneous true stereo digital EQ,
dynamics, & delay
• MIDI control of all programs & parameters
• "Glitch-Free" instantaneous program change
• 601/602 Librarian/Controller software
for MacIntosh computers
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 · USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
601/602 Stereo Digital Processors
Specifications
Input/Output
601 & 602 Analog Inputs XLR·female, >9 kilohms, line level, balanced
601 Additional Analog Inputs
XLR-female balanced microphone
input (48V nominal phantom power), 15 dB pad
Digital Inputs
XLR·female and RCA-female,
AES/EBU or S/PDIF
Analog Outputs
300-ohm source impedance,
balanced, XLR-male
Digital Outputs
XLR·male and RCA-female,
AES/EBU or S/PDIF
Maximum Input Level
+22 dBu
Maximum Output Level
+21 .5 dBu
FIiter Block
Type
Peak Characteristic
Shelving Characteristic
Peak/Dip Bandwidth
Three-band parametric EQ
(1 /1Ooctave ISO center frequencies)
31 Hz to 21 .11 kHz, peak and dip
31 Hzto21 .11 kHz,
Baxandall approximation
0.05 to 3 octaves,
measured at maximum boost
Delay Block
Delay Time
0.5 ms to 330 ms
Lowpass Filter Frequency
600· 18 kHz (feedback path only)
Modulation
Random, sine, or triangle wave
Dynamics Block
Types
De-essing, dynamic filter noise reduction,
downward expansion, compression, AGC/leveling
Compression Ratio
1.25:1 to 10:1
Expansion Ratio
1:1.25 to 1:8
Attack Time
100 microseconds to 1oseconds
Release Time
100 microseconds to 1Oseconds
Performance Data
Frequency Response
12 Hz to 20 kHz :1:1 .5 dB, dynamics block out,
EQ in (all levels set to 0), noise reduction out,
de-ess out, delay out.
Mic input equivalent input noise
•127 dBm, 20 kHz NBW
150-ohm source
Distortion (THD)
<0.01% @1 kHz, 1V RMS
Dynamic range
>104 dB. This represents the difference between
the largest and smallest signals that will pass
through the 602. Measured using 8192 point FFT
with Blackman-Harris windowing function .
Sample rate
48 kHz and 44.1 kHz
Converter types
Delta-Sigma
18-bit linear
Conversion method
MIDI
Connectors
Recognized/Transmitted
In, Out/Through
Program change, control change,
SYSEX, continuous controllers
128 read-only presets, 128 read-write presets,
memory protection, 3 front-panel lockout modes
Memory
Physical
Size (hwd)
Weight
1.75 x 19 x 7 inches, 4.44 x 48.26 x 17.78 centimeters
7.6 lbs (3.5kg) net
Electrical
Power requirements
117V ac nominal, 105 to 125V ac
50 to 60 Hz, 20 watts
230V ac nominal, 205 to 253V ac
50 Hz, 20 watts
I!:> 1995 Symelrix, Inc. Specifications subject to change without notice.
Architects and Engineers Specifications
The integrated signal processor (ISP) shall be an analog and digital 1/0
device accepting stero or mono signals, applying frequency response
equalization, delay-based effects and dynamics processing to those
signals, and delivering the processed input signals to the outputs. All
signal processing (equalization, delay, dynamics) shall take place
in the digital domain. The ISP shall occupy one rack space (1 U).
The panpot shall also operate in the digital domain with a sine-cosine
characteristic law.
The equalizer block shall take the form of a user and MIDI programmable
parametric equalizer capable of operating at three inflection points
simultaneously. All three bands of the equalizer shall be capable of
operating over the following frequency ranges and bandwidths: 31 to
21 .11 kHz with a bandwidth of .05 to 3 octaves, with a boost/cut range of
+15dBtooff.
The ISP shall be capable of accepting and delivering stereo digital
input signals at either a 44.1 kHz or 48.0 kHz sample rate. The ISP shall
be capable of converting analog signals to digital form using either the
44.1 kHz or 48.0 kHz sample rates.
The delay block shall provide two delays capable of up to 330 milliseconds
of delay. The delays shall be user and MIDI programmable.
The feedback path for delay recirculation shall be cross-coupled
between the two delays and the delay time shall be capable of accepting
modulation either from an internal random number generator or from
an internal sine- or triangle-wave source.
The dynamics block shall provide the following functionality: De-ess,
Dynamic noise filter, Compressor, AGC/Leveler and Downward
Expander. Within the dynamics block all sections shall be user and
MIDI programmable.
The output block shall provide level and panning for the output
signal. Both functions shall be user or MIDI programmable. The level
control shall operate in the digital domain over a :1: 18 dB range.
OSymetrix
STEAM POWERED RADIO.COM
The MIDI implementation, via MIDI Sysex, Control Change, and Program
Change, shall provide access to all major operating parameters of the ISP
and real-time editing capabilities shall be provided to allow real-time
parameter change during operation.
The ISP shall be capable of accepting and delivering stereo digital
signals conforming to the AES/EBU standard or to the S/PDIF standard.
Four such digital connections shall be provided. The AES/EBU connections shall utilize 3-pin XLR connectors. The S/PDIF connections shall
utilize RCA connectors.
The analog inputs shall be active balanced bridging designs. The line
inputs shall be terminated in 3-pin XLR female connectors. All analog
input circuitry shall incorporate RFI filters. The analog outputs shall be
active balanced designs having equal source impedances and terminated
with 3-pin XLR male connectors. All XLR connectors used for analog
input/output shall conform to the AES/IEC polarity standard.
The ISP shall be capable of operating by means of its own built-in power
supply connected to 117V nominal ac (105 to 130V) 50/60 Hz or 230V
nominal ac, (207 to 253V, 50 Hz).
The unit shall be either a Symetrix Incorporated Model 601 or 602.
Symetrix Inc. • 14926 35th Ave. W. • Lynnwood, WA 98037 · USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 •e-mail: [email protected]
572 SPL Computer
HE SYMETRIX 572 SPL COMPUTER is an automatic level controller that maximizes intelligibility by
changing gain in proportion to environmental noise level changes; in essence, controlling the volume of the background/paging system by measuring the volume of the ambient noise and then
adjusting the system gain accordingly. Unique to the 572 is its ability to utilize the sound system's
loudspeakers as noise measurement transducers, in place of the usual microphones.
T
The 572 switches the speaker line from the
amplifier's output to its own sensing input. In less
than one second it reads the ambient noise level and
switches the speaker line back to the amplifier.
Special impedance matching, frequency shaping,
and level shifting circuits allow the 572 to acquire
precise relative noise measurements from virtually
any speaker line, with any number of speakers of
any impedance, transformer coupled or direct
coupled, 25V or 70V.
be taken. This 572 takes advantage of silent periods
in the paging or music to take a sample, or it forces
a sample based on the front panel setting at timed
intervals. The 572 will unobtrusively fade out the
music, take a sample, and then fade the music back
in, all in a matter of seconds. The 572 will not,
however, interrupt any signal that appears at the
page input, thus keeping the unit from forcing a
sense period during a page.
From malls to restaurants to factories, the Symetrix
572 gives you effective, reliable, system level control
without an operator or the normal additional costs.
The operating characteristics of the SPL computer
are controlled by a powerful microprocessor,
running under Symetrix proprietary software. This
reduces the 572's calibration time and allows the
installer to optimize performance for any situation.
No test gear is needed because the 572 obtains and
stores the information it needs during calibration.
571 vs. 572 ...
Which one is right for your application?
The 572 has separate inputs for paging and music
as well as a direct paging microphone input. Both
the speakers and the amplifiers connect directly to
the 572. A front panel page over music function
enables up to 14 dB of music attenuation during announcements. There are multiple option switches for
telling the 572 how to treat the page/music signal as
well as how to react to changes in the acoustic
environment. The LED meter on the front not only
indicates gain change but also aids in set-up and
calibration and identifies errors.
The 571 uses one or more microphones to sense
the ambient, therefore, there is no need to interrupt
the audio signal to make changes. This is necessary
for applications that require constant paging signals
that need to be raised or lowered over short sections
of time. The cost effective 572 uses the speaker
system itself to sense changes, thus saving the installer/customer from the price of external sensing
microphones and cabling, but it must have periodic
silence in the audio for the speaker to perform as a
sensor.
You show the 572 the parameters of the acoustic
environment during calibration and then set the way
you want the unit to respond to changes. The 572
then takes the information it has stored in memory
and makes smooth, appropriate changes to keep the
levels exactly where you want them. In order for the
speakers to act as loudspeakers and sensors, there
must be times when no audio is passing through the
speakers to allow the sample of the ambient noise to
Features
Both of our SPL Computers perform similar functions
but are quite different in application and features.
• Uses speakers as noise sensing "microphones"
• Separate Page and Music inputs
• Works with direct coupled and
distributed systems
• Fast, simple calibration
• Economical
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA• Tel: (206) 787-3222 • FAX: (206) 787-3211 •e-mail: [email protected]
STEAM POWERED RADIO.COM
572 SPL Computer
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Specifications
Software
Control Range
Noise-to-Gain Ratio
Sample Interval
Frequency Response
THD+N
Signal-to-Noise Ratio
Input
Inputs
Pagingmic
(For microphone
level paging
signals)
Paging
(For line level
paging signals)
Music
(For line level
music signals)
Copyright Symetrix, Inc. 1989
Variable, up to 40 dB (·20 dB to +20 dB)
Variable, 2:1 to 1:2
Forced: Variable, 1 min. to 26 min
Auto: Silence periods (< ·30 dBm) > 800 ms
Page-Over Music: Variable, Oto 15 dB
20 Hz to 20 kHz+ 1 dB, ·O dB
<0.05% THD, unity gain, 1kHz
music Into balanced output
>70 dB, ref: OdBu, unity gain
(30 kHz noise bandwidth)
All balanced, transformerless
Impedance >1800 ohms
Nominal level -80 dBu to -40 dBu
Maximum level ·30 dBu
CMRR >60 dB
Impedance >40 kilohms
Nominal level OdBu, Maximum level +18 dBu
CMRR >40 dB
Impedance >40 kilohms
Nominal level ·10 dBu, Maximum level +18 dBu
CMRR>40dB
Output
Output
Impedance
Gain (VCA at unity)
Ve Scale
Physical
Size
Weight
Electrical
Power Requirements
Balanced, transformerless
200-ohms balanced, 100-ohms unbalanced
Minimum load: 600-ohms balanced
Nominal level OdBm
Maximum level +24 dBm (into 600-ohms)
Balanced input to unbalanced output = 0 dB
Unbalanced Input to balanced output = 6 dB
156 mV/ dB
1.75'H x 19-W x 7.5'D inches overall
(4.45H x 48.3W x 19.5 cm overall)
1.75'H x 19-W x 6.5' inches depth behind panel
(4.45H x 48.3W x 16.5 cm depth behind panel)
Bibs (3.6 kgs)
117 V ac, 60 Hz, .1amp (approx. 12 watts)
C1995 Symetrix, Inc. Specifications subject to change without notice.
Architects and Engineers Specifications
The ambient sensing automatic level controlling device shall regulate
the operating level of a sound system in proportion to changing noise
levels in the sound system's operating area. The device shall be capable of adjusting gain control over 40 dB overall (max) range, and shall
be governed by amicroprocessor which shall be controlled by embedded
software. The device shall vary its gain based upon measurements of the
sound pressure level of ambient noise In the environment.
These sound level measurements shall be made by the level control·
ling device through the loudspeakers otherwise used for the system's
output. To facilitate the use of the system's loudspeakers as noise
measuring "microphones," the device shall provide relay switching of the
speaker line circuit so as to disconnect the speakers from
the amplifier output and connect the speakers to Its own sensing input.
The device shall provide inputs for paging signals at microphone level
(nominal -40 dBv) or line level (nominal OdBv), and for music signals
at line level (nominal o dBv). The device shall have a Ratio control to
vary the ambient noise-to-gain ratio continuously from 2:1 to 1:2,
and a front panel switchable hard-wired bypass. Calibration of the
OSymetrix
STEAM POWERED RADIO.COM
automatic level controlling device shall be semi-automatic, and shall
require switching the device to CAL Mode, and adjusting the minimum
desired operating level and the maximum desired operating level. Calibra·
lion settings shall be continuously maintained in non-volatile memory
without the need for battery pack up power.
In addition to the various functions and general specifications
mentioned above, the ambient sensing automatic level control·
ling device shall meet or exceed the following overall performance criteria:
frequency response :t 1 dB 20 Hz to 20 kHz, total harmonic distortion less
than .05%at any attenuation from -40 dB to OdB (2 kHz) , maximum paging
microphone Input level ·30 dBv, maximum line input level +18 dBu,
maximum output level +24 dBm into 600-ohms (balanced). Minimum
impedance at the microphone inputs shall be 1800 ohms, minimum
Impedance at the line inputs shall be 1O kilohms. The device shall be
housed inan all steel chassis designed to be mounted Ina1U(t .75') space
in a standard 19" rack. The ambient sensing automatic level controlling
device shall be the Symetrix model 572 SPL Computer.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA • Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
571 SPL Computer
HE SYMETRIX 571 SPL COMPUTER is an automatic level controller that maximizes intelligibility by
changing gain in proportion to environmental noise level changes. In essence, controlling the volume of the sound system by measuring the volume of the ambient noise and then adjusting the
system gain accordingly. The operating characteristics of the SPL computer are controlled by a
powerful microprocessor, running under Symetrix proprietary software. This reduces the 571 's calibration
time and allows the installer to optimize performance for any situation. No test gear is needed because the
571 obtains and stores the information it needs during calibration.
T
The 571 has separate inputs for paging and music as
well as dual microphone inputs for the sensing
microphones and a direct paging microphone input.
A front panel page over music function enables up to
14 dB of music attenuation during announcements.
There are multiple option switches for telling the 571
how to treat the page/music signal as well as how to
react to changes in the acoustic environment. The
LED meter on the front not only indicates gain
change but also aids in set-up and calibration.
More than just a volume control, the 571 has an
"averaging time" control for the mic sensing and a
ratio control for adjusting the reaction of the 571 to
the changes in the ambient noise. The real intelligence of the 571 lies in its ability to ignore the
changes of signals passed through it and therefore
won't allow runaway gain changes as the system
tries to chase itself. You show the 571 the parameters of the acoustic environment during calibration and then set the way you want the unit to
respond to changes. The 571 then takes the
information it has stored in memory and makes
smooth, appropriate changes to keep the levels
exactly where you want them.
From racetracks to ballrooms to subway stations,
the Symetrix 571 gives you effective, reliable, system
level control that reacts to real world changes, not
timer set programs.
571 vs. 572
Which one is right for your application?
Both of our SPL Computers perform similar
functions but are quite different in application and
features.
The 571 uses one or more microphones to sense the
ambient and therefore doesn't need to interrupt the
audio signal to be able to make changes. This is
necessary for applications that require constant
paging signals that need to be raised or lowered over
short sections of time. The cost effective 572 uses
the speaker system itself to sense changes, thus
saving the installer/customer from the price of
external sensing microphones and cabling, but it
must have periodic silence in the audio for the
speaker to perform as a sensor.
Features
• Constant or averaged time sensing (1.2 secs.
to 5 min.)
• No runaway gain, feedback
• 40 dB control range
• Ignores level changes in the audio signal
passing through the SPL computer
• Allows for more than one microphone to
"average" a room's ambient signal
Symetrix Inc.· 14926 35th Ave. W. • Lynnwood, WA 98037 • USA• Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
571 SPL Computer
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Specifications
General Perfomance Data
Maximum Control Range
Ambient Noise-to-Gain Ratio
Averaging Time
Page-Over Music (ducking)
Frequency Response
THD+N
Noise
40 dB
Variable, 2:1 to 1:2
1.2 sec. to 5 min.
Variable, 0 to 14 dB
20 Hz to 20 kHz+ 1 dB, -0 dB
<0.05%, unity gain, 2 kHz,
music in to line out
Less than -85 dBm, unity gain (30 kHz noise bandwidth)
lnpuVOutput
Maximum Output Level
Maximum Input Level
+24 dBm (600 ohms balanced)
-30 dBu (mlc inputs)
+18 dBu (line inputs)
Input Impedance
Mic: electronically balanced bridging
200 ohms, nominal (not phantom powered)
Line: electronically balanced bridging,
20 kilohms nominal
Inputs
2 sensing mlc (-40 dBu nominal) CMRR = >60 dB at 1 kHz
1 paging mic (-40 dBu nominal) CMRR = >60 dB at 1 kHz
1 line (0 dBu nominal) CMRR = <40 dB at 1 kHz
1 music (-10 dBu nominal) CMRR = <40 dB at 1 kHz
Output
Transformerless balanced
Output Impedance
100 ohms
ICl1995 Symetrix, Inc. Specifications subject to change without notice
Architects and Engineers Specifications
The ambient sensing automatic level controlling device shall regulate
the operating level of a sound system In proportion to changing noise
levels in the sound system's operating area. The device shall be capable of providing gain control over up to 40 dB overall range , and
shall be governed by a microprocessor which shall be controlled
by embedded software. The device shall vary its gain based upon
measurements of the sound pressure level of ambient noise in
the environment. Inputs shall be provided for up to two sensing microphones. The device shall be capable of making 215 sound pressure level measurements per second, and shall have a continuously
variable Averaging Time control to cause the device to maintain a running average of those measurements for a minimum of 1.2 seconds
to a maximum of 5 minutes, before using that average to compute
gain adjustments. The device shall provide inputs for paging signals
at microphone level (nominal -40 dBu) or line level (nominal OdBu),
and for music signals at line level (nominal -10 dBu). Automatic regulation shall be selectable to apply to paging signals only
(Page mode), or to apply primarily to music signals (Music mode).
In Page mode the device shall adjust paging levels continuously with
respect to ambient noise sound pressure levels. In Music mode
the device shall adjust background music levels continuously with
respect to both ambient noise levels and paging activity; in Music mode,
paging signals shall cause the device to attenuate music signals
as determined by its Page-Over Music control, which shall be continu-
OSymetrix
STEAM POWERED RADIO.COM
ously variable from Oto 14 dB (ducking). The device shall have a Ratio
control to vary the ambient noise-to-gain ratio continuously from 2:1
to 1:2. An Output Gain Trim control shall be provided to allow overall
gain to be adjusted over a 20 dB range. The Output Gain Trim control
shall be remote controllable at a distance of up to 400 feet by
the connection of a50 kilohm variable resistor. Calibration of the automatic
level controlling device shall be semi-automatic , and
shall require switching the device to CAL Mode, and adjusting the
minimum desired operating level, and the maximum desired operating level. Calibration settings shall be continuously maintained in nonvolatile memory without the need for battery pack up power.
In addition to the various functions and general specifications mentioned above, the ambient sensing automatic level controlling device shall
meet or exceed the follow ing overall performance crite ria:
frequency response ±1 dB 20 Hz to 20 kHz, total harmonic distortion
less than .05% at any attenuation from -40 dB to OdB (2 kHz), maximum
paging microphone input level -30 dBu, maximum line Input level
+18 dBu, minimum sensing microphone input level -80 dBu, maximum
output level +24 dBm into 600 ohms (balanced). Minimum impedance at
the microphone inputs shall be 1800 ohms, minimum impedance
at the line inputs shall be 10 kilohms. The device shall be housed In an
all steel chassis designed to be mounted in a 1U (1.75') space in
a standard 19' rack. The ambient sensing automatic level controlling device shall be the Symetrix model 571 SPL Computer.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 ·USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
564E Quad Expander/Gate
ONICALLY SUPERIOR, easy-to-use, and built to survive the rigors of the road, the 564E Quad
Expander/Gate provides four channels of powerful expansion and gating functions with frequency
conscious detection in one single rack space. We didn't cut any corners when we designed this unit.
Inside and out, it's built for the most demanding audio applications.
S
Let's get right to the point. How fast is it? Very. It goes from 50 dB of attenuation to full open in 50 microseconds. A little math will show you that a 20 kHz attack transient will pass through unaffected. Totally free from
the "dulling" effect of other, slower designs, the 564E insures that your all-important drum sounds are clear,
crisp, and completely free of any audible distortion.
Easy-to-use and flexible. These may appear to be
contradictory, yet the 564E delivers the goods. Our
proprietary program-interactive release circuit delivers smooth, natural-sounding decay envelopes
automatically. We've simplified the Gate Range and
Expander Ratio controls by putting them all on one
knob so you can quickly dial in the right amount of
attenuation.
Unlike competing units that use "soft-gate" for
signals with long attacks and decays, the 564E uses
true downward expanders. Noise gates work like on/
off switches which can cut off the beginnings or
endings of signals. A "true" downward expander
works like a fader that can follow signals up and
down giving a smoother reaction. This allows you to
achieve the same noise reducing characteristics as a
noise gate without the unwanted artifact.
If a noise gate is desired for fast transient signals the
user simply turns the knob until the correct amount
of gate range is dialed in. As for flexibility, the Key
Filters prevent unwanted sounds from triggering the
gate action. For instance, use the Lowpass filter
to prevent the high-hat from opening the snare gate.
You can set this easily by ear using the Key Listen
mode. Symetrix uses a combination of Hipass and
Lowpass filters for the frequency divisions instead of
a single frequency and bandwidth control. This
allows the user to set up a window of accepted frequencies instead of just one small frequency band.
This combination of frequency detection and downward expansion allows the Symetrix 564E to be used
on cymbals, voices, woodwinds, and other softer,
low transient signals. Of course you still have the
ability to perform gating for higher transient signals
like a snare drum. There are also sidechain send and
return points for even more extensive audio tricks.
All this is packed into a rugged, 1U package. Features like electronically balanced XLR inputs and
outputs, toroidal power supply transformer, and 12
gauge steel chassis guarantee that the 564E will
stand up to years of road abuse; delivering top dollar
performance-at a reasonable price.
Whether it's separating live drum mies, automatically closing unused channels in a mixdown, or
controlling noise on mies in a boardroom table
discussion, the Symetrix 564E was made for the job.
Features
• Four channels of expander/gate In
one rack space
• Sidechain filters for "frequency conscious"
gating
• Key Listen function for precise filter settings
• Attack and release time controls
• Transparent, studio quality audio
Symetrix Inc. • 14926 35th Ave. W. • Lynnwood, WA 98037 · USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
564E Quad Expander/Gate
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Specifications
lnpuVOutput
Inputs
Maximum input level
CMRR @1kHz
Outputs
Maximum output level
XLR-female, 20 kilohms
line-level balanced bridging.
+18 dBu
>40 dB.
200-ohm source impedance,
floating balanced. XLR-male
600-ohm load
+24 dBm balanced
+18 dBm unbalanced
Sldechaln / Control Loop (Key Input)
Connector
TRS female, tip=return, ring=send.
Input Impedance
30 kilohms, unbalanced
Max input level
+18 dBu maximum
Output Impedance
300 ohms, unbalanced
Control voltage rejection
80 dB, measured at output with 100 Hz
square wave applied to Control Loop input
Lowpass/Hlpass Filters
Type
Frequency Response, fully open
Hipass Filter Range
Lowpass Filter Range
Gate
Maximum Attack
Minimum Attack
Maximum Release
Minimum Release
Range
12 dB/octave Butterworth
30 Hz to 30 kHz
30 Hz to 4 kHz
150 Hz to 30 kHz
50 dB/50 µs
50 dB/200 µs
50 dB/2 ms
50 dB/3 sec
0·60 dB
Downward Expander
Characteristic
Attack (fast)
Attack (slow)
Release (fast)
Release (slow)
Ratio
Max Attenuation
Soft-knee
50 dB/2 ms
50 dB/2 ms
50 dB/0.7 sec
50 dB/8.5 sec
1:1 to 1:3
Greater than 50 dB
Performance Data
Frequency Response
Distortion (THD+N) @1kHz
Crosstalk
Dynamic Range
Signal to Noise Ratio
Physical
Size, H X Wx D
Weight
Electrical
Power requirements
20 Hz to 20 kHz, +O, •1 dB
<0.03%@ 0 dB GR
<0.05%@ 10 dB GR
>90 dB @20 kHz
110 dB
92 dB @ 0 dBu In, 0 dBu out
Front Panel: 1.75 x 19 In., 4.5 x 48.3cm
Chassis: 1.7 x 17.4 x 9.6 in, 4.3 x 45 x 24 cm
11 lbs (5 kg) shipping
117V ac nominal, 105 to 125V ac
50 to 60 Hz, 16 watts
230V ac nominal, 205 to 253V ac
50 Hz, 16 watts
IC1995 Symetrix, Inc. Specifications subject to change without notice
Architects and Engineers Specifications
The Quad Expander/Gate shall provide four Independent channels
of dynamic range expansion for wideband, wide range audio signals.
The Expander/Gate shall occupy one rack space (1 U).
Gate range and Expander ratio shall be continuously adjustable via
a single front panel control. The threshold shall be adjustable from
-40 dButo +20 dBu. Expander mode shall offer program dependent attack
time within two ranges selectable from a front panel pushbutton. Gate
mode shall havetwo, fixed, selectableattack times. Release time shall be
continuously variable from the front panel.
There shall be separate, tunable, high pass and low pass filters in series
within the control loop. The cutoff frequencies shall be individually
adjustable via separate front panel controls. A Key Listen mode shall be
provided to route the side chain signal to the channel audio output for
listening during setup.
Each channel shall have a six segment LED meter that shall indicate gain
reduction amount. The meter shall have a range of 40 dB.
Pre-filter control loop access will be available via a 1/4' TRS female jack.
This shall be wired Tip=Return, Ring=Send, Sleeve=Ground.
The Inputs shall be active balanced bridging designs terminated with
3-pinXLR (AES/IEC standard wiring).TheInput circuitry shall incorporate
OSymetrix
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RFI filters. The outputs shall be active balanced designs having
equal source impedances and terminated with 3-pin XLR (AES/IEC standard wiring).
The inputs shall accommodate +18 dBu signals without distortion.
and the balanced outputs shall be capable of delivering +24 dBm Into
a 600-ohm load.
Overall frequency response (+O, -1 dB) shall be 20 Hz to 20 kHz. THD+N
shall no be greater than 0.03%, 0 dB g/r, 1 kHz into a 600-ohm load.
Dynamic range shall be 110 dB.
Rack-mounting hardware shall be integral to chassis top, sides and face.
Chassis top and sides shall be formed from 12 gauge CRS. All XLR
connectors shall be mounted on, and supported by, chassis panels.
The unit shall occupy one rack space (1U).
The unit shall have a built-in power supply with a toroidal power transformer,and operate from 117V nominal ac (105 to130V) 50/60 Hzor230V
nominal, 207 to 253V ac, 50 Hz.
The unit shall be a Symetrix Incorporated model 564E Quad
Expander/Gate.
Symetrix Inc.· 14926 35th Ave. W. • Lynnwood, WA 98037 · USA • Tel: (206) 787-3222 • FAX: (206) 787-3211 •e-mail: [email protected]
528E Voice Processor
HE 528E is a complete, self-contained voice processor that performs six separate functions: microphone pre-amplification, de-essing (sibilance removal), compression/limiting, downward expansion,
parametric EO, and voice symmetry alignment. All six processors may be used simultaneously.
Although we call the 528E a "Voice Processor", it is perfectly suitable for any signal, vocal or not.
T
Each function features a full complement of controls in an easy-to-use layout. Separate LED meters monitor
mic gain and dynamics gain reduction functions thus facilitating quick and accurate adjustment of controls.
As a dedicated single-channel voice processor, the 528E delivers the same processing power found in an
entire recording studio signal chain. With the 528E you get all the control you need, without the cost or
complication of separate units.
The 528E works with any professional microphone.
The mic preamp's gain is variable up to 60 dB, and
48 volt phantom power is provided for condenser
mies. A switchable 15 dB pad reduces gain in front
of the mic pre-amp to prevent distortion in super
close micing situations. A front panel switch selects
between microphone or line input. Both inputs are
transformerless and are equipped with filters to
prevent radio frequency interference (RFI) .
The de-esser senses and regulates selectable high
frequencies to reduce or eliminate annoying sibilance and "lip smacking". De-esser controls are
Frequency and Range.
Symetrix' program controlled Integrated Dynamics
Processing (IDP) techniques combine the best
attributes of compressor/limiters and downward
expanders. The compressor/limiter maintains
uniform levels while the downward expander
eliminates "pumping", "breathing", and noise build
up. Because it's program controlled, the 528E's
dynamic range processor responds quickly to
transients, and gently to smaller level changes.
Controls provided are Expand Threshold, Compress
Threshold, and Compression Ratio.
The three band parametric EQ performs both
creative and corrective operations, with bandwidth
variable from .3 octave to 4 octaves, 15 dB boosV
cut, and overlapping frequency ranges.
A unique "leap frog" topology minimizes the number
of amplifiers in the signal path while ensuring that
each frequency band interacts with its neighbor in a
desirable and musical fashion. Use the 528E's parametric to enhance voices and/or eliminate resonances and interference. EO controls are CuVBoost,
Bandwidth, and Frequency for each of three bands.
The voice symmetry switch corrects for excessive
positive or negative signal peaks of the human voice.
A simple in/out switch controls Voice Symmetry.
Revered as the choice for broadcast voices and
known as the "one channel console" by recording
studios, the 528E easily steps into the track of it's
predecessor, the Symetrix 528 Voice Processor.
Features
• Works with any microphone (or line input)
• Enhances vocal Intelligibility
• Increases perceived loudness and "presence"
• Great for voices as well as Instruments
and effects
• Reduces off-mlc noise
• Reliable, proven design
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 · USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
528E Voice Processor
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Specifications
Inputs
Controls and Switches
Mic and Line input connectors
Clip LED
Mic Gain, Phantom Power, Mic/Line
XLR female (2)
Fires at +17 dBu output level
from mic preamp
or line input amplifier
Microphone input type
Balanced translormerless,
low impedance
Phantom Power (DIN 45 596)
+48V, nominal
Microphone Pre-amp Gain
22 to 60 dB (pad out),
7 to 45 dB(pad in)
Microphone input maximum input level
-3 dBu (pad out)
Equivalent input Noise (EIN)
-126 dBV. (150-ohm source,
20 Hz to 20 kHz)
THD+N (preamp only)
0.05% (2 kHz, 50 dB gain, +17 dBu output)
Mic Pre-amp CMRR
> 60 dB (40 dB gain, 20 Hz to 20 kHz)
Line input type and impedance
1Okilohm translormerless
balanced bridging
Line input maximum input level
+24 dBu
Line input nominal input level
+4 dBu
Line input CMRR
> 50 dB (0 dBu, 20 Hz to 20 kHz)
Parametric Equalizer
Type
Bands
Peak/Dip Bandwidth
Maximum boost/cut
Metering
Type
Output Level
Gain Reduction
Three-band parametric equalizer
Low: 16 to 500 Hz, Mid: 160 to 6300 Hz
High: 680 Hz to 22 kHz
.3 to 4 octaves,
measured at maximum boost
±15 dB
Multi-segment LED bargraph
-20 to +3 VU (0 VU = +4 dBu), VU calibrated,
peak responding
Separate displays for: de-ess, downward
expander, compressor. 0 to 20 dB per display
Overall Performance Data
Frequency Response
THD
Noise Floor
20 Hz to 20 kHz +O, -0.5 dB, EO out
compressor out, downward
expander out, de-esser out
.05%, 20 Hz to 20 kHz, +4 dBm output
better than -89 dBu, 20-22 kHz.
Dynamic Range Processor
Type
Interactive comp/limiter-downward expander
Comp/limiter ratio
1:1 to 10:1
Downward Expansion ratio (max)
1:1.8
De-esser Type
Program controlled high-cut filter,
12 dB/octave
Frequency Range
800 Hz to 8000 Hz
Threshold
-30 to OdBu
Output Section Type
Balanced translormerless
Maximum output level
+24 dBm balanced,+ 18 dBm unbalanced
Connector
XLR male
Output Clip LED
Fires 3 dB below clipping
Output source impedance
200 ohms, balanced
Minimum load impedance
600-ohms balanced or unbalanced
Voice Symmetry switch
Improves modulation symmetry
of speech signals
Output gain
±15 dB
Physical
Size (hwd)
Weight
Electrical
Power requirements
1.75x19x7in
4.44 x 48.26 x 17.78 cm
7.6 lbs (3.5kg) net 10 lbs (4.6kg) shipping
117V ac nominal, 105 to 125V ac
50 to 60 Hz, 18 watts maximum
230V ac nominal, 205 to 253V ac
50 Hz, 18 watts maximum
0 1995 Symetrlx, Inc. Specifications subject to change without notice
Architects and Engineers Specifications
The voice processor shall be capable of all signal processing functions
commonly found on a mixing console input channel, including
microphone signal preamplilication, line input buffering, simultaneous de-essing, downward expansion, compression/limiting, and
parametric equalization.
The unit shall have a low-noise, low distorlion microphone preamplifier
with variable gain (22 dB to 60 dB) and switchable (on/off) +48V phantom power. A 15 dB pad shall be provided to accommodate highoutput microphone signals. A balanced-bridging line input suitable
for +4 dBu input signals shall also be provided along with a switch
to select either the microphone or line inputs.
The voice processor shall have an integral de-esser which shall offer
up to 20 db of attenuation within a manually sweepable frequency
range of 800 Hz to 8 kHz. There shall be front panel controls for range,
frequency, and a bypass switch.
The dynamics processing section shall contain an interactive
compressor/limiter and downward expander. There shall be front
panel controls for compression ratio (1 :1 to 10:1), compressor
threshold (-50 dBm to +20 dBm), expander threshold (·30 dBm to
OdBm), and a bypass switch.
There shall be athree-band parametric equalizer. Each band shall have±15
dB maximum boost/cut, and continuously variable bandwidth
(.3 octaves to 4 octaves). The equalizer bands shall have substantially
overlapping frequency ranges, with acombined range ol 16 Hz to 22 kHz.
There shall be a front panel bypass switch.
The voice processor shall be equipped with the following LED displays: An
eight-segment LED display shall be provided for monitoring the overall
output level, six-segment displays for monitoring the de-esser, compres-
OSymetrix
STEAM POWERED RADIO.COM
sor/limiter, and downward expander. All displays shall be independent.
There shall also be a single LED clip indicator to indicate clipping within
either of the input preampliliers or buffers.
The microphone Input shall be an active balanced bridging design terminated with 3-pin XLR -lemale connector (AES/IEC standard
wiring). The microphone preamp shall be capable of an equivalent
input noise specification of at least -126 dBu (150-ohm source,
60 dB gain, 20 Hz to 20 kHz). The line input shall be a balanced,
translormerless design using a 3-pin XLR-lemale con nector (AES/IEC standard wiring). All input circuitry shall incorporate
RFI filters of the LC lowpass type.
The output shall be an active balanced design terminated with a
3-pin XLR-male connector (AES/IEC standard wiring). The output signal
level shall be switchable to accommodate subsequent line or microphone inputs. The output section shall provide a switchable phase rotator
for the purpose of improving the asymmetry of speech
waveforms.
Access to the dynamics processing sidechain shall be provided via a
1/4 inch TRS jack. Access to the interstage connections between all
processing sections (mic/line preamp,de-esser,compressor/limiter/downward expander, equalizer, output stage) shall be provided via
hall-normalled tip-ring-sleeve (TRS) jacks.
The voice processor shall be capable of operating by means of its
own built-in power supply connected to 117V ac nominal
(105 to 130V), 50/60 Hz or 230Vac nominal (207 to 253V ), 50 Hz.
The un it shall be a Symetrix Incorporated model 528E
Voice Processor.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 ·USA · Tel: (206) 787-3222 • FAX: (206) 787-3211•e-maii: [email protected]
501 Peak-RMS Compressor/Limiter
-------· ---------
HE SYMETRIX 501 PEAK/RMS COMPRESSOR/LIMITER is a precision dynamic range controller
intended for use in the most demanding professional audio applications. The 501 is two dynamics
controllers in one unit. Separately controlled, simultaneous RMS detection and peak limiting is
provided so that the limiter can be set to prevent spikes and allow the compressor to control the
signals without applying more than the desired amount of gain reduction. The 501 performs both duties with
unsurpassed distortion and noise specifications. A full complement of controls gives the operator the ability to
perfectly tailor dynamic response. This isn't a one slider device, you are in control.
T
Standard engineering practice often calls for the use
of low ratio compression, as a creative device, to
achieve dynamic characteristics that are more
pleasing to the ear. Since the 501 's compressor is
RMS responding (like the human ear) it's easy to get
a consistent, more listenable sound . The RMS
compressor section is designed to provide both
manual and automatic (program controlled) attack
and release times. The wide range of the ratio and
threshold controls make the 501 usable over a 50 dB
range. RMS detection, high headroom input circuits
and output drivers, give the 501 its well known sonic
excellence.
However, an RMS compressor alone does not
prevent clipping distortion or tape saturation. For
this reason, standard practice also dictates the use
of a peak limiter, as a protection device, to take
control of transient peaks that would otherwise
cause overload distortion. The peak limiter catches
even the fastest transient spikes, with its exceedingly
quick 2000 dB/msec attack time.
With both types of processing in the same package,
the Model 501 provides both creative and protective
dynamic range control. This is one reason why the
501 has become not only a first choice for vocal
applications but is widely known as ''the" compressor/limiter choice for bass players, allowing the
low frequency notes to sound close and full , while
protecting the player's amp from overloading during
sharp slaps and pounding of the bass strings. With
this type of performance and reliability the 501 has
become the audio experts' tool of necessity.
Backed by eighteen years of designing audio
processors, the Symetrix 501 can only be called
"performance elegance" in the classic sense of audio
quality and reliability.
Features
• RMS and Interactive Peak control
• Manual or Automatic attack/release
• Balanced and Unbalanced connections
• Stereo linkable
• Sidechaln access
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA• Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
501 Peak-RMS Compressor/Limiter
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Specifications
lnpuVOutput
Inputs
XLR-female, >20-kilohms line-level
balanced bridging, >20-kilohms unbalanced bridging
TRS-female paralleled with XLR connector
200-ohm source impedance, balanced. XLR-male
Outputs
TS-female (unbalanced) transformer balanced optional
100-ohm source impedance
Maximum input level
+20 dBu, balanced
Maximum output level
+26 dBm balanced (600 ohms)
+20 dBm unbalanced (600 ohms)
(onset of clipping/1 % THO)
100-ohm source impedance
Sidechain
?-kilohm input impedance
Separate TS, unbalanced, send and receive jacks
Compressor
Type
Manual Attack time
Manual Release time
Auto-release time
Threshold
Ratio
Limiter
Attack time
Release time
Threshold
Ratio
RMS responding , soft-knee
variable: .25 to 12 dB/ms
variable: 5 to 300 dB/sec
program dependent
-40 dBu to +1odBu
1.4:1 to- :1
2000 dB/ms (approximately 1/2 cycle at 50 kHz)
110 dB/sec
-10 dBu to +20 dBu
Performance Data
Frequency Response
THO+N
20 Hz to 20 kHz +O, -1 dB
.025 %, +0 dBm in, +O dBm out, 10 dB gain
reduction, 1 kHz, 30 kHz low-pass filter
<0.09 %, +O dBm in, +O dBm out,
1OdB gain reduction, 20 kHz (distortion
products primarily 2nd harmonic)
Equivalent Input Noise (EIN)
better than -85.5 dBu, 600-ohm
source impedance, unity gain
better than -95.5 dBu, 600-ohm
source impedance, 20 dB gain reduction
Physical
Connectors
Size (hwd)
Weight
Electrical
Power requirements
input: XLR-3F, ¼' TRS
output: XLR-3M, ¼' TS
sidechain: ¼' TS (two)
1.75 X 19 X 5 in
4.44 x 48.3 x 12.7 cm
7 lbs (15.4kg) shipping
117V ac nominal, 120V ac
60 Hz, 12.5 Watts maximum
230V ac nominal, 240V ac
50 Hz, 12.5 Watts maximum
<!:>1995 Symetrix, Inc. Specifications subject to change without notice.
- :1
Architects and Engineers Specifications
The compressor/limiter shall be a single channel unit that reduces
the dynamic range of wideband, wide range audio signals. It shall
have separate compressor and peak limiter sections and occupy a
single rack space (1 U).
The unit shall have a RMS responding compressor section with separate controls for ratio, threshold, attack, and release. A front panel
switch shall be provided to engage the auto release time mode. The ratio
shall be adjustable from 1.4:1 to Infinity: 1. The peak limiter
shall have a fixed infinity: 1. ratio, fixed attack rate of 2000 dB/ms, and
adjustable threshold (·10 dBm to +20 dBm).
The inputs shall be active balanced bridging designs terminated with
3-pin XLR (AES/IEC standard wiring), and 1/4' TRS. The input circuitry shall incorporate RFI filters. The output shall be an active balanced
design, terminated with 3-pin XLR (balanced output, AES/I EC standard
wiring), and a ¼' TS jack (unbalanced output). The active-balanced
output shall be capable of delivering +26 dBm, balanced, into a600-ohm
load. A transformer-coupled output shall be available as an option.
There shall be separate ¼' TS female connectors provided for the
sidechain send and return.
OSymetrix
STEAM POWERED RADIO.COM
The unit shall be capable of being linked with another like unit for
stereo operation. In this mode, the overall gain reduction of the two
channels shall be based upon the mono-sum of the two input signals
and each unit shall receive identical gain-reduction control signals.
The stereo-link function shall be controllable via a front-panel switch.
Overall frequency response shall be 20 Hz to 20 kHz (0 dB, -1 dB). THO
shall not exceed .025% with 10 dB gain reduction, 600-ohm load,
1 kHz tone at OdBm. The equivalent input noise (EIN) shall be-85.5 dBU
or better at unity gain with a 600-ohm source over a 20 Hz to 22 kHz
noise bandwidth.
The AGC shall be capable of operating by means of its own built-in
power supply connected to 117V nominal ac (105 to 130V) 50/60 Hz
(230V nominal, 207 to 253V ac, 50 Hz where applicable).
The unit shall be a Symetrix Incorporated model 501 Peak RMS
Compressor/Limiter.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
488 DYNA-Squeeze™
VER WONDER what sets the really successful engineers and producers apart from the Joe Average ones?
Well, from our conversations with Grammy Award winners there appear to be lots of things. In our quest
for new product ideas, these experts provided us with some valuable clues. No matter what brand console
or recorder they use there's a sacred, unwritten rule: pay meticulous attention to levels and cut tracks hot!
E
The Symetrix 488 DYNA-Squeeze" is an eight channel
compressor/interface for use with digital multitrack
recorders/workstations in recording and production
studios. Interfaced between mixing console and
recorder, the 488 gently squeezes your tracks toward
the upper end of the recorder's dynamic range, giving
digital recordings the feel of analog while preserving the
clarity of digital. The results are impressive, the tracks
are hot!
Tracks processed by DYNA-Squeeze have "presence"
and increased articulation which is lacking in unprocessed tracks. Vocals punch. Acoustic instruments and
drums come forward . Reverb "tails", cymbal decays.
And other subtle nuances are more up front. When it's
time to mix, DYNA-Squeeze'd tracks let engineers and
producers sit back and concentrate on the creative
aspects of the mix instead of riding gain on tracks that
were cut at the wrong levels. Ask anyone who knows better basic tracks make for a better final mix. With
DYNA-Squeeze tracking goes faster and sound quality
gets better. It's that simple.
For all their strengths, digital recording devices have
several distinct weaknesses: at high levels, they're very
unforgiving. Hit them with just a little too much input
level and WHAMO! Digital clipping and unusable audio.
At low levels they lack the resolution to accurately
reproduce the signals at their input. Subjectively, most
engineers and producers hear this as "graininess". So
what do people do? They record at very conservative,
very low levels to avoid clipping; therefore accepting
reduced signal to noise ratio, and an increase in low
level distortion! Engineers who painstakingly ride gain
down to avoid digital clipping rob themselves of
valuable creative time while they're lucky to get 12 bits
out of a well designed 16 bit recording system. Is this
trade-off really necessary? Not at all. Not with DYNASqueeze!
DYNA-Squeeze between your console's bus outputs
and your recorder's inputs. Once connected, guess
what? You don't have to run the faders on your console
at ridiculously low levels any more to avoid overloading
your recorder! Most analog consoles put out much
more level than digital (or analog) multi-tracks will
accept. Most likely your console outputs go to +24
level. The unbalanced input of the ADAT, for example,
reaches full scale (digital clip) at +8 dBV! Enter DYNASqueeze. DYNA-Squeeze's rear panel +4/-1 0 switch lets
you come at DYNA-Squeeze full on (our input doesn't
clip until +241). Then we drop our output signal by just
the right amount to perfectly interface to ADAT and
DA-88. A single, wide range threshold control sets the
amount of gain riding for all eight channels. Run your
console levels up to where you're comfortable, adjust
the DYNA-Squeeze threshold for the sound you like,
and take off. That's all there is to it.
If you record to digital tape (ADAT, DA-88, 3324, etc.)
or to a disk-based workstation (PROTOOLS, SPECTRAL, SADIE, etc.) or if you still prefer an analog
recorder, the Symetrix 488 DYNA-Squeeze can make
your job easier and make you sound better. With
almost two decades of experience designing and
manufacturing cutting edge gain controllers, we've
come up with a unique product that is unbeatable in
performance and price. To DYNA-Squeeze your next
recording, contact us now for the name of your nearest
Symetrix dealer.
FEATURES
• Higher average recording levels
• Increased "presence"
• Level matching to digital recorders
• Minimum component signal path for sonic
transparency
The 488 is easy to use. Set up is embarrassingly
simple. Just use standard patch cords to connect
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA • Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
488 Dyna-Squeeze™
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Specifications
Audio
Inputs
Outputs
Maximum input level
Maximum output level
Frequency Response
THD+noise
Maximum compression
Nominal output level
Output Noise
Dynamic Range
Crosstalk
Input common mode rejection
Attack time
Release time
Threshold range
Ratio
Output trim range
Eight, balanced bridging
Eight, unbalanced, zero ohm source
+24 dBu
+18 dBu into 2 k ohms
+O,-1 dB, 20 Hz-20 kHz
<0.05%, 0 dBu in, 10 dB
gain reduction, 1 kHz
38 dB
+4 dBu, -10 dBV(switch selectable)
-90 dBu, broadband
>110 dB
-100 dB ,+20 dBu in,20 Hz- 20 kHz
>40 dB @l kHz
1.5 milliseconds
1.2 seconds
-40 dBu to +1odBu
2.5:1 (soft knee)
-10 dB to +10 dB
Physical
Input connectors
¼" tip-ring-sleeve
Output connectors
¼' tip-sleeve
Polarity
tip of input jack is high, ring is low, sleeve is ground
tip of output jack is high, sleeve is ground
Chassis size
1.75'H x 19' W x 7.25'
4.45 cm H x 48.3 cm W x 18.4 cm D
Shipping weight
8 lbs, 3.63 kg
Electrical
Power
Power Consumption
11 ?V ac, nominal, 105-130V ac, 50-60 Hz
230V ac, nominal, 207-255V ac, 50 Hz
15watts
In the Interest of continuous product Improvement, Symetrlx, Inc. reserves the
right to alter, change, or modify these specifications without prior notice.
©1995, Symetr1x, Inc. All rights reserved.
Highlights
Higher Average Recording Levels. The 488 can easily
increase average recording levels on your digital or
analog tape recorder by 10 dB (or much more if you
like) with virtually no side effects. In fact...
recorder inputs. This forces engineers to operate the
board at uncomfortably low levels. With the flip of a
switch the 488 matches most any console to most any
digital recorder.
Increased Presence. As DYNA-Squeeze increases
average levels, musical articulation is magnified. Subtle
sounds become more "up front", more "present".
Minimum Component Signal Path. In a typical
automated console you can find 12-24 opamps and
several VCA's in the signal path from mic input to bus
output. The DYNA-Squeeze signal path is sonically
pure: 2 opamps, 1 VGA. That's it!
Level matching. Many professional mixing consoles
have output levels that are much hotter than digital
Architects and Engineers Specifications
OSymetrix
STEAM POWERED RADIO.COM
The Eight Channel Compressor/Interface shall be a high performance,
eight-input, eight-output compressor and signal level interface. It shall
occupy a single rack space. (1 U)
The unit shall contain eight independent compressors. All eight channels
are operated from a single set of controls. It shall not be possible to alter
the settings of one channel relative to the remaining channels.
Each channel shall have a single balanced input and a single unbalanced
output. All input and output connectors shall utilize tip-ring-sleeve (TRS)
¼' jacks. The inputs shall be active balanced bridging designs incorporating LC lowpass filters for RFI supression.
An overall threshold control shall determine the threshold of the entire
unit simultaneously. An overall gain trim control shall alter the overall
gain of all channels simultaneously over a range of± 1OdB. A single in/
out switch shall disable all channels simultaneously. The output signal
level shall be switchable between +4 dBu and -10 dBV via a single switch
for all channels.
The compressor shall be capable of operating by means of its own builtin power supply connected to 11 ?V nominal ac (105-130V) 50/60 Hz.
Independent four-element bargraph displays shall be provided for
monitoring the degree of gain reduction for each channel.
The unit shall be a Symetrix, Incorporated model 488 DYNA- Squeeze·.
Symetrix Inc. · 14926 35th Ave. W. • Lynnwood, WA 98037 ·USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
450 Mic/Line Mixer
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HE 450 MIC/LINE MIXER satisfies the requirements for paging microphone and mono/stereo line mixing in
clubs, restaurants, hotels, conference facilities, houses of worship or anywhere that multiple audio inputs
must be combined and distributed. The compact one-rack-space mixer accepts two microphone inputs
(with +48V phantom power and low frequency filters) and four stereo (or mono) line inputs.
T
Each input may be assigned to a stereo output zone, a mono output zone or both. A unique hierarchical priority
structure permits one of the mic inputs and/or one of the line inputs to have priority over the other sources assigned
to the same zone. For example, in a typical configuration, a paging microphone assigned to the stereo zone will have
priority over a background music source in that zone. A jukebox in the same zone will have priority over the
background music, but the paging signal will retain
ultimate priority and force muting of both the jukebox and
FEATURES
the background music whenever the page mic is used.
As a result of its inherent flexibility the 450 is a perfect
low-cost solution for many small system requirements.
By accepting audio inputs from virtually any type of audio
source and selectively routing to either the mono or
stereo output zone, the 450 can save you time and
money in the design and installatjon of your next project.
Please call or ax us today for more information and a
copy of our free application notes.
C henn,el
Input.
Leve l
• Separate stereo and mono output zones
• 4 stereo inputs (may be used as mono)
• 2 mlc Inputs with +48v phantom power
• 2 Inputs have priority override capability
• Remote volume control capablllty
• Uncompromlsed sound quality
• Mic 1 Input accepts telephone page signal
Output
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Symetrix Inc.· 14926 35th Ave. W. • Lynnwood, WA 98037 · USA · Tei: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
450 Mic/Line Mixer
Specifications
Audio
2 balanced low impedance
Microphone Inputs
>85 dB
Mic common mode rejection @1 kHz, 1v RMS
+48V (1 Oma per Input max)
Phantom power
four, stereo, balanced
Line Inputs
>1Ok ohms, balanced
Line input impedance
>85 dB
Common mode rejection @1 kHz, 1v RMS
+24 dBu, balanced
Maximum line input level
+18 dBu, unbalanced
>40 dB
Line Input common mode rejection @1kHz, 1V RMS
:1:1 dB, 20 Hz-20 kHz
Frequency response, any input to any output
Physical
Microphone inputs
Line inputs and outputs
Remote volume control inputs
Chassis size
Shipping weight
XLR female (pin 2 high)
¼' tip-ring-sleeve (tip is high)
1/ , tip-ring-sleeve
1.75'H X 19' W X7.5' D
4.45cm H x 48.3cm Wx 19.1cm D
8 lbs, 3.64kg
Electrical
Power
117V ac nominal, 95-130V ac, 50·60Hz (UL listed)
230Vac,nominal, 165-255V ac, SOHz (TUVapproved)
15 watts, maximum
Power Consumption
In the interest of continuous product improVl!ment, Symetrix, Inc. reserves the
right to alter, change, or modify these specifications without prior notice.
C 1995, Symetrlx, Inc. All rights reserved.
Highlights
Superb audio perfonnance. All circuits in the 450 have
been carefully designed to meet or exceed the sonic
performance of the finest studio quality mixers.
Versatile and hassle-free. Accepts microphone or line
level inputs and everything inbetween. It doesn't matter
what your audio source is, what impedance it is, or
where it's coming from. Chances are you can plug it
straight into the 450 and get the right level.
Reliable. The 450 is manufactured using the highest
quality industrial grade components. We rigorously test
each and every parameter of every unit leaving our
factory. You can expect years of trouble free operation
from the 450.
Backed by a company that cares. With almost twenty
years in the professional audio industry, Symetrix
strives to support each and every customer in any way
that we can. We care. We're in it for the long haul.
Architects and Engineers Specifications
The audio microphone and line mixer shall be a high performance unit
occupying a single rack space (1 U).
The unit shall have two low impedance, balanced microphone inputs
with connection via female XLR. Each microphone Input shall have a rear
panel gain trim potentiometer which varies the gain of the microphone
preamplifier over a 35dB range from 25 to 60 dB. Microphone input #1
shall also accept balanced or unbalanced line level signals from a
telephone system (nominal sensitivity of -1 SdBv) via a ¼' phone jack
connector.
Associated with each microphone input shall also be a level control
potentiometer whose purpose is to establish the level of the microphone
channel as it is mixed to either a mono output zone, astereo output zone,
or both simultaneously. Each microphone input shall also have a first
order low cut filter with a 100 Hz rolloff frequency.
The mic/line mixer shall have four stereo, balanced line level Inputs. Each
input shall be assignable to either amonaural output zone,astereo output
zone, or both. Associated with each line input shall be a level control
potentiometer whose purpose is to establish the level of the line level
input signal as it is mixed to either a mono output zone, a stereo output
zone, or both simultaneously.
OSymetrix
STEAM POWERED RADIO.COM
Microphone input number one and line input number one shall serve as
dedicated priority inputs meaning that audio applied to either of these
inputs may override (duck) mic input #2 and line inputs #2,3, and 4
provided they are assigned to the same output zone as the priority input
is assigned. Independent master output level controls shall be provided
for both the monaural output zone and the stereo output zone. For each
output zone a potentiometer shall be provided which establishes the
sensitivity (threshold level) at which the priority input overrides the other
inputs.
Independent means shall be provided to remotely control the output level
of the mono output zone and the stereo output zone. Rear panel jacks
shall be provided to accept connections from standard SOK linear
potentiometers forth is purpose. When wired for remote control, the front
·
panel output zone controls shall be disabled.
The mic/line mixer shall be a Symetrix, Inc. model 450 Mic/Line Mixer.
Symetrix Inc.· 14926 35th Ave. W. , Lynnwood, WA 98037, USA• Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
425 Dual Compressor/Limiter/Expander
I
N DESIGNING THE 425 DUAL COMPRESSOR/LIMITER/EXPANDER, Symetrix engineers aimed for audio control
that would work for a variety of audio applications. Providing you with the right combination of tools is what IDP
(Integrated Dynamics Processing) is all about. IDP makes all three processing modes (compression, limiting,
and downward expansion) available all the time: no switching between sections, no patching in extra boxes.
If background noise, tape hiss, or pickup hum is the
problem, eliminate them with the downward expander.
The 425 uses a true downward expander, not a socalled "soft gate". A downward expander won't chop off
the transients and decays like a gate would, yet it can
work just as effectively for reducing those noises
between sounds. A noise gate works like an on/off
switch while a true downward expander works like an
engineer riding a fader, following the signal as it decays.
While the downward expander is taking care of the
noise, the 425's compressor section allows you to
apply the right amount of compression from a gentle
squeeze to a hard squash without "pumping" or
"breathing". And because the separate limiter section is
guarding against peaks that would cause problems, it
frees the compressor section to be set for the job of
compression and not protection. Trying to set a typical
compressor for multiple jobs like this usually results in
settings that aren't optimized for either application. The
limiter protects against problems and the compressor
smooths signals out for a silky, listenable finish.
Symetrix uses powerful, streamlined controls that
make the 425 easy to set up and operate. Appropriate
parameter adjustments allow you to match the settings
to the situation. You decide the way you want the 425
to react to the signals, not some predetermined ratios
or thresholds.
The 425 is easy to install, providing both XLR balanced
and ¼' line level connectors. The UL approval means
that it can fit into any installation with confidence.
In the final analysis, Integrated Dynamics Processing
means clean, quiet sound that meets professional
demands in any situation. High-quality components
and "minimal signal path" circuitry make the 425
exceptionally transparent. The Symetrix name on the
front panel guarantees it all.
Features
• Integrated Dynamics Processing includes
downward expander, compressor and limiter
• Stereo-coupled or two-channel operation
• Individual LED meters for each processing
section and output
• Separate threshold controls for expander,
compressor and limiter
• Sidechain input/output
• Balanced XLR and unbalanced 1/4" line
level connections
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Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA• Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
425 Dual Compressor/Limiter/Expander
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Specifications
10 Hz to 60 kHz +O, -3 dB
Frequency Response
THD+N
.02%, 4 dBu in, +18 dBu out, 0 dB gain reduction,
20 Hz to 20 kHz, 30 kHz low-pass filter
.04%, 4 dBu in, +4 dBu out, 1OdB gain reduction,
1 kHz, 30 kHz low-pass filter
+25 dBu, balanced
+23 dBu balanced (600 ohms)
+20 dBu, unbalanced
+18 dBu unbalanced (600 ohms)
at onset of clipping (1 % THO)
Maximum Output
Maximum Gain Reduction
Maximum Input
Input Impedance
40 dB
+20 dBu, balanced
+20 dBu, unbalanced
43 kilohms, balanced
30 kilohms, unbalanced
Output Impedance
300 ohms balanced
150 ohms unbalanced
Load Impedance
600 ohms minimum,
balanced/unbalanced
Output Noise
Dynamic Range
Crosstalk
Sidechain
-90 dBu, measured at balanced output,
input terminated in 600 ohms,
20 kHz rolloff in analyzer
115 dB (difference of maximum
output and noise floor)
-95 dB 1k, [email protected] 1Ok, +4 dBu in, remaining
channel terminal terminated in 600 ohms,
20 kHz rolloff in analyzer
CMRR
Greater than 40 dB
Compressor
Type
Attack Time
Release Time
Auto Release
Threshold
Ratio
RMS responding
2mS
180 mS to 2.5 S long-term
20 mS to 1 sec. (20 mS burst)
-40 dBu to +20 dBu (bypass)
1:1 to 10:1
Limiter
Attack Time
Release Time
Threshold
Ratio
200 ~s
100 ms
-10 dBu to +20 dBu
20:1
Expander
Attack Time
Release Time
Threshold
Ratio
4mS
250 ms to 5s
OdBu to -40 dBu (bypass)
1:1.5
Physical
Connectors
Polarity
Size
Shipping Weight
Power
input: XLR , 'I/ TRS
output: XLR, 'I/ TRS
sidechain: 1/ , TRS (one)
pin 2 of XLR is hot, tip of TRS jack is hot
1.75'H X 19'W X 7.25'0
4.45cm H x 48.3cm W x 18.4cm D
8 lbs (3.63kg)
10W, 120 Vac, 60 Hz
10W, 220 V ac, 50 Hz
©1995 Symetrix, Inc. Specifications subject to change without notice.
1OD-ohms source impedance,
6800-ohms input impedance,
TRS jack, tip is return
Architects and Engineers Specifications
The Compressor/Limiter/Expander shall be a dual channel model
that controls the dynamic range of wide range, wideband audio signals,
providing compression , peak limiting, and downward expansion
simultaneously. The unit shall occupy one rack space (1 U).
The threshold of the compressor section shall be adjustable over arange
of -40 dBu to +20 dBu via afront panel control. When the control is fully
clockwise the section will be in bypass mode. The input-to-output ratio
will be adjustable from 1:1 to 10:1. Control of the compressor release
time shall be program dependent with in a range set by the
front panel release control. The compressor section will have a dedicated eight segment LED ladder that will display the gain
reduction amount.
The Compressor/Limiter/Expander shall contain an integral peak limiter
having a 20:1 ratio and adjustable threshold level. A green LED
indicator shall be provided to indicate peak limiter activity.
Afront panel switch, with LED indicator, shall select between dual mono
and stereo master/slave operation. Each channel shall have a bypass
switch which defeats all front panel controls for that channel.
The Compressor/Limiter/Expander shall also contain a downward
expander having a 1:1.5 expansion ratio with threshold, and release
time controls. A four segment LED display shall be provided to indicate the amount of downward expansion.
The inputs shall be active balanced bridging designs terminated with
3-pin XLR (AES/IEC standard wiring) , and 'I/ TRS female. The input
circuitry shall incorporate RFI filters. The outputs shall be active bal-
OSymetrix
STEAM POWERED RADIO.COM
anced designs having equal source impedances and terminated with
3-pin XLR (AES/I EC standard wiring), and ¼' TRS female.
The balanced inputs shall accommodate +20 dBu signals without
distortion, and the balanced outputs shall be capable of delivering
+23 dBm into a 600-ohm load.
Overall frequency response shall be 10 Hz to 60 kHz (+O dB, -3 dB).
THD+N shall be 0.02% measured under the following conditions:
+4 dBu input, +18 dBu output, BYPASS switch out, 20 Hz to 20 kHz,
· 30 kHz low-pass filter, OdB gain reduction. Residual noise output shall
be no greater than -90 dBu, measured with a 20 kHz noise bandwidth,
input terminated in 600 ohms.
When the unit is inoperative (either by loss of power, or via the BYPASS
switch), the inputs and outputs shall be wired together. There shall be
no transients transmitted to the output terminals during either turn-on,
turn-off, or bypass operation.
Access to each channel's sidechain shall be provided via a single 1/4'
TRS female connector. The ring connection shall be the sidechain output
and the tip connection shall be the sidechain return.
The unit shall be capable of operating by means of its own built-in power
supply connected to 117V nominal ac (105 to130V) 50/60 Hz (230V
nominal, 207 to 253V ac, 50 Hz where applicable). The AGC shall be
Listed by Underwriters Laboratories, Inc. (UL) or other equivalent
nationally recognized safety testing agency.
The unit shall be a Symetrix Incorporated model 425 Dual Compressor/
Limiter/Expander.
Symetrix Inc.• 14926 35th Ave. w., Lynnwood, WA 98037 • USA• Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
422 Stereo AGC-Levele r
AVE YOU EVER NOTICED how audio comes in all shapes and sizes? There's loud audio. There's
quiet audio. There's pretty audio. There's ugly audio. There's music. There's speech. There are CD's
mastered at drastically different levels. There are movie sound tracks where the effects are too loud
and the dialog so soft you can't understand the words.
H
Have you ever been on an airplane trying to watch the
movie and found yourself repetitively turning the
volume up and down and up and down again? The
background noise is high and the movie sound track is
either uncomfortably loud or buried in the background
noise. And you ask yourself, "Why in this age of really
hi-tech audio systems can't I enjoy the audio track for
this movie I'm trying to watch?"
Well, back on earth if you want to free yourself from the
ups and downs of unpredictable audio program levels
then you need a Symetrix 422 Stereo AGC-Leveler. It's
easy medicine. The 422's controls are simple and
intuitive, making setup a nonevent. But the real payback
is in the sound- the 422 converts "all over the map"
signal levels into smooth, intelligible, constant level audio.
Why can't I use a compressor/limiter to do the same
thing? When it comes to maintaining constant output
levels, a compressor/limiter can only do half the job, at
best. Sure, when things get too loud the comp/limiter
kicks in, but what about when things get too soft? A
comp/limiter is a "top down" device - it pushes down
from the top, preventing overload and distortion in
subsequent stages. But what about the "bottom up"
part of the deal? What about the low level signals that
contribute so much to the intelligibility of speech and
the enjoyment of music?
The 422 Stereo AGC-Leveler solves the problem. The
422 does it all. It makes the loud sounds quieter and
the quiet sounds louder. And it does it with finesse.
You'll be amazed. The 422 works without the side
effects audio professionals have been conditioned to
expect from compressors and limiters. Noise,
pumping, and modulation are not part of the 422's
vocabulary. Bringing the volume to where you want it
and keeping it there is what the 422 is designed to do.
The 422 may be used in_virtually any type of sound
system for processing just about any kind of audio.
Insert the 422 at a convenient patch point where you
have "line level" audio. We don't hassle you with
annoying "-10,+4" level matching switches - just give
the 422 a basic line (not mic level) signal and you're
ready to go.
The 422 is easy to use. There are basically only four
controls. The first and most important is the target level
control. As the name implies, this control sets the
volume where you want it. The 422's unique input over
output parallel VU meters simultaneously show you the
unmodified input signal on top and the result of your
target level setting just below it. The detector control
increases the "sensitivity" of the AGC. As you turn it
counterclockwise the 422 gently "reaches down" for
the lower volume audio and brings it up. Set the target
level and detector, then use the ratio control to increase
or decrease the amount of leveling. At high ratios the
program density increase results in a more "present" or
"in your face" sound. At low ratios the 422 performs
subtle, yet effective, automatic gain riding. Lastly,
adjust the peak limit control to create an absolute
"ceiling" level. This is an especially handy feature for
protecting amps and speakers in discos where DJ's
often succumb to a disease known as "volume creep"
as the evening wears on.
The 422 Stereo AGC-Leveler is a remarkably sophisticated volume controller that is amazingly easy to use
and brought to you by a company with almost twenty
years experience in the design of dynamic range controllers. If you want to know more please call or FAX
today.
Features
• 'Target Level' control makes setup simple
and quick
• Peak limiter prevents sound system overload
or tape distortion
• Parallel input/output LED meters show exactly
what's happening
• Remote bypass port
• Solid, reliable, built to last
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
422 Stereo AGC-Levele r
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Specifications
Audio
Inputs
Outputs
Maximum input level
Maximum output level
Frequency Response
THD+noise
Stereo, balanced bridging or unbalanced
Stereo, balanced or unbalanced
+24 dBu
22 dBu into 600 ohms
OdB :t: 1dB, 20 Hz-20 kHz
.05%, OdBu in, 10dB
gain reduction, 1kHz
-90 dBu, broadband
Output Noise
>110 dB
Dynamic Range
• 60 dB , +20 dBu in, 20 Hz-20 kHz
Crosstalk
40 dB @1kHz
Input common mode rejection
-70 dBu to OdBu
AGC Detector range
1:1 to 5:1
Ratio
30 dB
Target level range
-15 dBu to +25 dBu
LimlterThreshold
>15:1
Limiter Ratio
Physical
1/4" tip-ring-sleeve, XLR, & RCA
Input connectors
1/4" tlp-ring-sleeve,XLR, & RCA
Output connectors
tip of input jack is high, ring is low, sleeve is ground
Polarity
tip of output jack is high, ring is low, sleeve is ground
1.75'H x 19' W x5.75 D
Chassis size
4.45cm H x 48.3cm W x 14.61cm D
Bibs, 3.63kg
Shipping weight
Electrical
Power
117V ac, nominal, (105-130Vac), 50-60Hz UL listed
(external in-line power supplies):
230Vac nominal (207-255V ac), 50Hz TUV approved
12 watts
Power Consumption
In the Interest of continuous product Improvement, Symetrix, Inc. reserves the
right to atter, change, or modify these specifications without prior notice.
0 1995, Symetrix, Inc. All rights reserved.
Architects and Engineers Specifications
The Automatic Gain Controller (AGC-Leveler) shall be astereo model that
reduces the dynamic range of wide range , wideband audio signals and
provides peak limiting. The AGC shall occupy one rack space (1U).
The AGC-Leveler shall be capable of controlling audio signals ranging
from -70 dBu to +24 dBu and reducing their range by an inpuVoutput ratio
of from 1:1 to 5:1. A target output level control shall be provided to shift
the level of the output signal over anominal :t:15dB range.The release time
of the AGC shall be controlled by the presence and nature of input signals.
The AGC-Leveler shall also contain an integral peak limiter having at least
a15:1 ratioand adjustable threshold level. Agreen LEO indicator shall be
provided to indicate peak limiter activity. The peak limiter threshold shall
determine the absolute maximum output amplitude of the AGC/Leveler
regardless of other conditions.
TheAGC-Levelershall provide identical peak responding input and output
level meters. These meters shall be capable of responding to signals
ranging from -48VU to+ 12VU (-50 dBu to+ 16 dBu). An output clipping
indicator shall be provided.
The inputs shall be active balanced bridging designs terminated with 3pin XLR (AES/IEC standard wiring) female and ¼" (tip-ring-sleeve) jacks.
The outputs shall be active balanced designs terminated with 3-pin XLR
(AES/IEC standard wiring) male and ¼"(tip-ring-sleeve) jacks.
OSymet rix
STEAM POWERED RADIO.COM
Overall frequency response shall be 20 Hz to 20 kHz, :1: 1dB, measured
at +4dBv output. There shall be no morethan 0.02% harmonic distortion
measured under the following conditions: +4dBu input, +4dBm output,
BYPASS switch out, 1000Hz test frequency. Residual noise output shall
be no greater than -90 dBu measured in a 20 kHz noise bandwidth
with an rms responding meter.
When the unit Is inoperative (etther by loss of power, or via the BYPASS
switch,) the inputs and outputs shall be wired together. A REMOTE
BYPASS facility shall be provided whereby an external contact closure
shall force the AGC-Leveler into BYPASS mode.
The 117V nominal ac (105 to 130V) 50/60 Hz supply shall be UL listed.
The 230V nominal ac (207 to 253Vac) supply shall be TUVapproved,with
an external in-line power supply.
The AGC-Leveler shall be a Symetrix, Incorporated model 422 Stereo
AGC-Leveler.
Symetrix Inc. • 14926 35th Ave. W. • Lynnwood, WA 98037 · USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 · e-mail: [email protected]
421 m AGC-Leveler with Mic/Line Input
HE SYMETRIX 421 m AGC-LEVELER is a sophisticated audio gain controller, but what it does is simple:
it makes quiet sounds louder and loud sounds quieter-just like a skilled audio engineer. Set the desired,
"target" output level and the 421 m gently boosts signals that drop below your target, and smoothly pulls
back those that rise above it. Operation is automatic, precise, and completely transparent-no pumping
or breathing. The user sets the range of control and the 421 m works exactly as instructed-automatically.
T
Any audio application where clarity and intelligibility are
important can benefit from a 421 m. Everybody speaks
at different levels and works at varying distances from
the microphone. Intelligibility can vary from person to
person or moment to moment. How do you put
everyone on the same level? Hire a trained sound
engineer... or use a 421 m. The 421 m is equally well
suited to processing program material (for stereo
applications two 421 m's may be linked). Program
levels from soundtracks, CD jukeboxes, or broadcast
audio go up and down unpredictably. The 421 m gently
and unobtrusively raises the low level audio and
compresses the high level audio without side effects.
Its flexible input configuration will handle just about
any audio source, from studio microphones to
telephone-based paging systems. Installed sound
systems, recording studios, and broadcast facilities all
benefit from increased intelligibility-and that's what
the 421 m is all about.
Here's how it's done. The 421 m's Automatic Gain
Control (AGC) section incorporates a smooth-acting
leveling amplifier working in conjunction with a makeup gain stage coupled to the ratio control. Increasing
the ratio on the leveling amplifier makes your program
denser, but your output level stays constant no matter
what happens at the input. Roughly translated, this
means that you could speak two feet from a microphone and have the same volume output that you had
at 6 inches (and vice versa). To deal with existing
system or program noise, the 421 m offers a fullfeatured downward expander section to effectively quiet
the output when input signal is absent. A separate
"brick wall" peak limiter provides speaker protection in
PA systems and overload prevention in broadcast or
transmission applications. Last but not least, switchable speech curve filters have been incorporated to
optimize the 421 m for voice range performance.
What really sets the 421 m apart is the way its "smart"
circuitry reacts to real-world situations. Previous AGC
designs often proved troublesome because they would
confuse noise and feedback with the desired program
signal, boosting noise or cutting off soft-spoken
phrases. These problems are eliminated by the 421 m's
proprietary Auto Release Monitor circuit, which
instantly distinguishes the difference between "real"
signals (music and speech), noise and feedback.
The 421 m's metering system is one key to its simple
setup and operation. Parallel LED displays show input
compared to output. It is quickly obvious if the 421 m is
adding gain to your signal or subtracting. Because you
can hear and see the net results of the leveling action
the guess work is taken out of setup.
Flexible, accurate and trouble-free automatic gain
control has always been a good idea. Now, with the
pace-setting 421 m, Symetrix makes it a cost-effective
reality. Please call or FAX today for more information
on how to use a 421 m in your next project.
Features
• Target oriented AGC-Leveler
• Final stage llmlter
• Downward expander with Auto Threshold
• Line and mlc Inputs
• 125 Hz and 6 kHz speech curve filters
• Parallel Input/output metering
• Stereo linkable
Symetrix Inc. • 14926 35th Ave. W. • Lynnwood, WA 98037 • USA • Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
421 m AGC-Leveler with Mic/Line Input
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Specifications
Connectors
Line Inputs
¼"TRS jack and screw terminals
20k balanced bridging,
Mic Input
XLR-female, 1Ok balanced bridging
Outputs
XLR-male, screw terminals, 200-ohms source
impedance, differentially balanced, +23 dBm maximum level
TS phone, unbalanced,+ 18 dBm maximum level
Bypass
Relay controlled, hard-wire bypass In
power-off and bypass conditions.
Sidechain
TRS phone, unbalanced send and receive,
1000-ohm source impedance, 10k input
impedance. Tip= receive, Ring = send.
Downward Expander
Ratio
Threshold
Attack Time
Release Time
AGC-Leveler
Ratio
AutoRelease Threshold
Attack Time
Release Time
Target Output
Range
Peak Limiter Ratio
Threshold
Attack Time
Release Time
1:2
-50VU (bypass) to -20VU (Auto Threshold)
1 ms
Program dependent, .3 - 3.5 seconds
depending on amount and duration
1:1 to 4:1
-70 dBu to -30 dBu
approximately 1 ms
Program dependent, 500 ms-5 seconds
depending on amount and duration.
Mic Preamp
Gain Range
Impedance
Max Input Level
THO +noise (gain control fully CW)
Phantom Power
CMRR
Sonics
Frequency Response 20 to 50 kHz, +4dBm (+0, -1dB) (+0, -3dB mic)
Harmonic Distortion
<0.05% 20 Hz to 20 kHz, +4dBm,
30 kHz bandwidth. Typically <0.01%@ 1000 Hz.
Residual Noise
-90 dBu, 20 kHz noise bandwidth,
rms responding meter
Speech Curve
Type
Frequencies
Switch selected cutoff filters allow tailoring LF
and/or HF response for speech applications.
LF = 125 Hz, 12 dB/octave HF= 6kHz, 24 dB/octave
lnpuVOutput Metering
Type
Range (min. to max.)
Ballistics
Calibration
Power
+20 dB
10:1
-15VU to +23VU (bypass)
1ms for 90% gain reduction
.8 seconds
+15 dB to +45 dB
10k Ohms
+8dBu
-85 dBu
48V(±2)
>80 dB (10 Hz - 20 kHz)
Physical Size
Shipping Weight
LED Bargraph, 12 steps+ clip
66 dB
peak
0 dB = OVU = +4 dBm = 1.23V
Ex1ernal in-line power supplies:
11 ?V ac, 50 to 60 Hz, 1OW (UL listed)
230V ac, 50 to 60 Hz, 1OW (TUV approved)
1.75'H X 19'W X 7.25'0
(4.45cm H x 48.3cm W x 18.4cm D)
8 lbs (3.363 kg)
©1994 Symetrix, Inc. Specifications subject to change without notice.
Architects and Engineers Specifications
The Automatic Gain Control (AGC) shall be asingle channel model that reduces
the dynamic range of wide range, wideband audio signals, providing peak
limiting, downward expansion and bandpass limiting filters. The AGC shall
occupy one rack space (1 U).
The AGC shall be capable of controlling audio signals ranging from -70 dBu to
+24 dBu and reducing their range by an inpuVoutput ratio ranging from 1:1 to
4:1. The inpuVoutput ratio shall be adjustable via a front-panel control. Response speed switching shall be provided to accommodate speech and music
sources. Atarget output level control shall be provided to shift the level of the
output signal over anominal ±20 dB range. The release time of the AGC shall be
controlled by the presence of Input signal and the signal sensor shall be capable
of discriminating between music/speech and random noise or pure tones. The
threshold level of the signal sensor shall be adjustable via afront panel control
and the presence of signals above the threshold setting shall be indicated via a
green LED.
TheAGC shall also contain an integral peak limiter having at least a10:1ratio and
adjustable threshold level. Agreen LED indicator shall be provided to indicate
peak limiter activity. The peak limiter threshold shall determine the absolute
maximum output amplitude of the AGC-Leveler regardless of other conditions.
The AGC shall also contain an integral downward expander having a 1:2
expansion ratio with threshold and release time controls. Furthermore, the
downward expander shall be capable of operating automatically via the signal
sensor circuitry. Agreen LED indicator shall be provided to indicate downward
expander circuit activity.
Bandpass limiting filters shall be provided having alowpass characteristic of 24 dB/
octave at 6 kHz and ahighpasscharacteristicof 12 dB/octave at 125 Hz. Both filters
shall be capable of being used indMdually or simultaneously.
The AGC shall provide identical peak responding Input and output level meters.
These meters shall be capable of responding to signals ranging from -54 VU to
+12 VU (-50 dBu to +16 dBu). An output clipping indicator shall be provided.
OSymetrix
STEAM POWERED RADIO.COM
The AGC shall provide facilities for stereo-coupling two units via a shielded
5-pin DIN male-to-male cable. Afront panel switch shall designate which unit is
the master and which unit is the slave.
The line level inputs shall be active balanced bridging designs terminated with
¼" TRS female and screw terminals. The mic level input shall also be an active
balance bridging design using athree pin XLR female (AES/IEC standard wiring).
The input circuitry shall incorporate RFI filters. The outputs shall be active
balanced designs having equal source impedances and terminated with 3-pin
XLR (AES/IEC standard wiring), and screw terminals. Aseparate ¼' TRS jack
shall provide an unbalanced output.
The balanced line level inputs shall accommodate +24 dBu signals without
distortion, and the balanced outputs shall be capable of delivering +23 dBm into
a 600-ohm load. The mic level input shall accommodate +8dBu signals. There
shall be separate gain trim controls for the mic and the line inputs and the mic
input shall provide 48V phantom power.
Overall frequency response shall be 20 Hz to 20 kHz,±1dB, measured at +4 dBm
output. There shall be no more than 0.02% harmonic distortion, measured under
the following conditions: +4 dbu input, +4 dBm output, BYPASS switch out, 1000
Hz. Residual noise output shall be no greater than -90 dBm, measured with a20
kHz noise bandwidth.
When the unit is inoperative (either by loss of power, or via the BYPASS switch),
the inputs and outputs shall be wired together. There shall be no transients
transmitted to the output terminals during either turn-on, turn-off, or bypass
operation.
The AGC shall be capable of operating by means of an in-line external power
supply. The 117V nominal ac (105 to 130V) 50/60 Hz supply shall be UL listed.
The nominal 230V (207 to 253V ac, 50 Hz) supply shall be TUV approved. The
unit shall be a Symetrix Incorporated model 421 m AGC-Leveler.
Symetrix Inc. · 14926 35th Ave. W. · Lynnwood, WA 98037 · USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 •e-mail: [email protected]
420 Stereo Power Amplifier
HE 420 STEREO POWER AMPLIFIER is a two-channel power amplifier for use in professional and
commercial audio systems. The 420 may be operated as a two channel amplifier with 20 watts
(RMS) per channel, or as a single channel amplifier capable of 40 watts (RMS) output (bridgedmono mode). The 420 is intended for use in powering near-field monitors, small reference speakers
used for radio or audio for video reference, small paging speakers, multiple pairs of headphones, or as a
general purpose line driver/distribution amplifier.
T
The 420 is easy to install and simple to operate as
well. When used as a stereo amplifier, a single
ganged potentiometer controls the level of both
channels. As a 2-channel amp there's an independent level control for each channel. In conjunction
with the level controls each channel has a bright red
LED to indicate the onset of clipping.
A front panel MODE switch mono sums (mixes) the
two inputs. This feature is handy for broadcast and
recording engineers who wish to check the mono
compatibility of their signals. Commercial sound
engineers can use this feature to mix paging signals
or paging and music signals.
In recording studios and other similar applications,
the 420 makes an ideal headphone amplifier. You
can drive one pair of phones from the front panel
jack, or many pairs from the rear panel terminals. In
fact, the 420 will drive multiple professional headphone sets such as the AKG K-240 to 122 dB SPL!
While the 420 is compact (1 rack space) and low
cost, one should not overlook it's impressive
performance data. Total harmonic distortion (THO)
is less than .04% at 1 watt output (see the back of
this page for complete specifications). The 420 is
truly a professional amplifier-clean, crisp sound
reproduction and total freedom from noise. As an
added feature , the 420's relatively low stray field
emissions allow it to be racked next to a wide variety
of audio and video equipment without adversely
affecting the equipment's performance.
As with all Symetrix products the documentation
accompanying the 420 is second to none. This
means you'll be able to install and begin using the
product in no time at all. Our mean time between
failure statistics are among the best in our industry,
but should you require applications assistance or
repair you 're backed up by a worldwide network of
Symetrix distributors and dealers.
Features
• Compact (uses only 1 rack space)
• 20 watts/channel (stereo)
• 40 watts (mono bridged)
• Mono mix mode
• Front panel headphone jack
• Front panel output mute switch
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA • Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
420 Stereo Power Amplifier
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Specifications
Connections
Inputs
XLR-female paralleled with tip-ring-sleeve 1/4" jacks
1okilohms line-level balanced bridging
balanced CMRR greater than 55 dB @1 kHz
Outputs
Two, 4 ohms minimum
impedance, #6 screw terminals
Maximum input level
+21 dBu
20 watts RMS, per channel ,
Maximum output (stereo/2-channel)
into a 4- or 8-ohm load
Maximum output (mono bridged) 40 watts RMS into an 8-ohm load
Minimum load
4-ohms, stereo mode;
8-ohms, monobridged mode
100-ohm source impedance,
Headphone output
19V open circuit with speakers off
Performance Data (measured at 120V ac line voltage)
Frequency response
20 Hz to 20 kHz +O, -1 dB
Crosstalk
>60 dB (22 kHz bandwidth)
Sensitivity
OdBu for 20 watts into an 8-ohm load
Maximum Gain
27 dB
Signal to noise
>95 dB
Typical Distortion
<0.04%, @1 kHz, 1 watt into 8 ohms
THD+N
<.2%, 20 Hz to 20 kHz, @20 watts into 8 ohms
Clip Indicators
one per channel
Physical
Size (hwd)
1.75 x 19 x 7 inches
4.44 x 48.26 x 17.78 cm
7.6 lbs (3.5kg) net
10 lbs (4.6 kg) shipping
Weight
Electrical
Power requirements
120Vac nominal, 108 to 132Vac
60 Hz, 100 watts
(01995 Symetrix, Inc, Specifications subject to change without notice.
Architects and Engineers Specifications
The power amplifier shall be a compact, two input, two output, high
performance, power amplifier. It shall occupy a single rack space. (1 U)
The unit shall be capable of delivering 20 watts per channel into
a minimum load of 4 ohms. The unit shall also have a mono-bridge
mode which delivers 40 watts into a minimum load of 8 ohms. The
inputs shall be active balanced bridging designs terminated with 3-pin
XLR (AES/IEC standard wiring) , and ¼' TRS female. The input
circuitry shall incorporate RFI filters . The balanced inputs shall
accommodate +24 dBu signals without distortion. Screw terminals
shall be provided for power amplifier outputs.
THD shall not be greaterthan 0.04%,@1 kHz,@ 1watt in 8ohms. Signal
to noise ratio shall be greater than 95 dB. Frequency response shall be
20 Hz to 20 kHz (+O dB, -1 dB).
The power amplifier shall be protected from output short-circuits.
A front panel Dual Tracking switch shall allow the Channel 1 gain
control to simultaneously control the level of both channels. There shall
be a ¼' tip-ring-sleeve jack mounted on the front panel for stereo
headphoneoutput. Afront panel switch shall be provided to mute the rear
panel output connections. Another front panel switch shall be provided
to sum the two input signals and route them to the two gain controls.
Independent clipping indicators shall be provided for each output
channel.
The amplifier shall be capable of operating by means of its own builtIn power supply connected to 120V nominal ac (108 to 132V) 60 Hz.
The unit shall be a Symetrix Incorporated model 420 Stereo Amplifier.
\
OSymetrix
STEAM POWERED RADIO.COM
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA• Tel: (206) 787-3222· FAX: (206) 787-3211 • e-mail: [email protected]
402 Dual Output Delay
HE SYMETRIX 402 DUAL OUTPUT DELAY is a 1 input, 2 output digital audio room delay intended
for acoustical alignment of distant speaker systems. This is a necessity due to the delay caused by
distance when multiple speakers are spread throughout a large room. In any multi-path situation,
large or small, the arrival time for sound arriving at the listener's ears via the room and via the
sound system should be matched plus a small additional delay of 10 to 25 ms. The additional delay causes
the listener to localize the direction of the sound to that of the first arrival, even if the late arrival is louder. This
effect is known as the Haas Effect. The 402 allows you to delay the remote speakers to match the time it takes
for the signal coming from the main speakers to reach the listener positioned near the remote speakers. This
way the two signals (delayed remote speakers and non-delayed front speakers) arrive at the listener at the
same time. This improves intelligibility and helps focus the listener's attention to where the sound is really
coming from. The 402 may be used wherever quiet, distortion-free delay is needed: churches, auditoriums,
theaters, concert halls, stadiums, and large meeting rooms.
T
What sets the 402 apart from other delays is the
meticulous attention paid to superb audio performance specs. A 64 times oversampling 19 bit AID
converter feeds the signal through a 20 bit digital
delay line. The two delayed outputs return through
18 bit D/A converters for total system dynamic range
exceeding 100 dB. To further optimize noise
performance, the 402 provides a 12 segment input
headroom meter which makes it extremely simple
for the user to optimize input level settings. Simply
put, the sound of the 402 is transparent enough for
even the most demanding applications-better than
CD quality to say the least.
Setting the delay times of the two outputs is a snap.
The user first selects which output to adjust and
then either increases or decreases the delay time
with the push of a button. A bright seven segment
LED displays the delay time. Delay times are
displayed in milliseconds, feet, or meters. If desired,
the user may measure the distance from the front of
house speakers to the placement of the remote
speakers and simply enter in the distance in feet or
meters. The 402 figures the proper delay time
accordingly. There are no cryptic dip switches or
multi-page displays to contend with.
Installers can choose XLR balanced, ¼' phone
connectors, or barrier terminal block for the input
and outputs. For security, a rear panel lockout
switch disables the delay adjustment controls. An
optional full panel security cover is available as well.
The 402 is a reliable, easy to use, high performance
digital delay, which comes with the Symetrix
reputation for quality and support.
Features
• 19 bit A/D, 18 bit D/A's for >100 dB
dynamic range
• Two Independently adjustable outputs
• Simple, Intuitive user Interface
• Delay settings stored In non-volatile memory
-no battery to replace
• Automatic hard wire bypass In case of
power loss
• Front panel lockout
• Barrier terminal, XLR, and ¼" phone connectors
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Symetrix Inc.· 14926 35th Ave. W. • Lynnwood, WA 98037 ·USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
402 Dual Output Delay
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Specifications
One, 4700-ohms balanced bridging
XLR-female, TRS and screw terminals
Inputs
Outputs
Maximum Output Level
Frequency Response
Distortion (THD+nolse)
Headroom Display
Dynamic Range
Signal-to-Noise
Sample Rate
Converter Type
Oelay Storage
Two, 100-ohms source impedance,
balanced. XLR-male, TRS and screw terminals
Maximum Input Level
Maximum Delay Time
Conversion Method
+20 dBu
Parameter Storage
+22 dBu into an open-circuit balanced load
+20 dBm into 600 ohm balanced loads
12 Hz to 20 kHz ±1 .5 dB
Security
<0.015%@1 kHz, 1V RMS
885 milliseconds, 999 feet, 304 meters
Approvals
12-LED bargraph,
8 green LED'[email protected] 6 dB/step
3 yellow LED's @1 dB/step
1 red LED @ true clipping
Physical
Size (hwd)
>104 dB. This represents the difference
between the largest and smallest signals
that will pass through the 402.
Measured using 8192 point FFT with
Blackman-Harris windowing function
93 dBfs measured with RMS voltmeter
using 20 kHz "Brickwall" filter
Weight
Electrical
Power
Power consumption
18-bit linear, 64X oversampling times 2
2 18-bit samples per sample
period processed to form a 19-bit
word. 20-bit data is stored
EEPROM non-volatile memory
Backup battery NOT required
Guaranteed for 10,000 parameterchanges
over 6 years at 4 delay changes/day, every day)
Recessed rear panel lockout
switch disables delay increment switches
Optional security cover (SC· 1)
Listed by Underwriters Laboratories Inc,
control number 2T38
1.75 X 19 X7 in
4.44 x 48.26 x 17.78 cm
7.5 lbs, 3.4 kg (shipping wt.), 6 lbs, 2.7 kg (net)
117V ac nominal, 105 to125Vac
50 to 60 Hz,
230V ac nominal, 205 to 253V ac, 50 Hz
12.5 Watts
101995 Symetrix, Inc. Specifications subject to change without notice.
48 kHz
Sigma-Delta
Architects and Engineers Specifications
The Digital Delay (DDL) shall be a single input, dual output model
that delays its input signal by a precise period before delivering the
delayed signal to its output. There shall be two independent delays
provided, each sharing a common input, and a common chassis. All
signal processing shall occur within the digital domain. Delays utilizing
bucket brigade delays, or other analog means shall not be acceptable
within the letter of this specification. The DDL shall occupy one rack space
(1U).
The DDL shall be capable of delaying an audio signal by up to 885 ms. The
delay time shall be adjustable in one millisecond, one foot, or
one meter increments. The delay lime shall be displayable in milliseconds, feet, or meters and shall be selectable from the front panel at
any lime during operation. Each channel's delay time shall be stored
in non-volatile memory. Provision shall be made to disable the front·
panel delay-time adjustment.
The DDL shall indicate its peak input signal level via a multi-step
LED ladder having the following indication points: ·48, -42, -36, ·30, ·24,
18, -12, ·6, -3, -2, •1, and clip.
The frequency response shall be 12 to 20000 Hz ±1.5 dB. The dynamic
range shall be 104 dB minimum. The dynamic range shall be defined
as the difference between the largest output signal possible and
the smallest output signal possible. The total harmonic distortion shall be
no more than 0.015%, measured at 1 kHz, 1V RMS.
The inputs shall be active balanced bridging designs terminated with 3pin XLR (AES/IEC standard wiring) , ¼' TRS female, and screw
terminals. The input circuitry shall incorporate RFI filters. The out·
puts shall be active balanced designs having equal source impedances
and terminated with 3-pin XLR (AES/IEC standard wiring) , and screw
OSymetrix
STEAM POWERED RADIO.COM
terminals. A separate ¼' TRS jack shall provide an unbalanced output.
The DDL shall accept input signals ranging from · 10 to +4 dBu.
The balanced inputs shall accommodate+20 dBu signals without distor·
tion, and the balanced outputs shall be capable of delivering +22 dBu into
an open-circuit balanced load, and +20 dBm into600-ohm balanced loads
without distortion . The output level of each output
shall be adjustable over the range of -1Oto +4 dBu.
When the unit is inoperative (either by loss of power, or via the
BYPASS switch), the inputs and outputs shall be wired together. There
shall be no transients transmitted to the output terminals during either
turn-on, turn-off, or bypass operation.
The Digital Delay (DDL) shall be capable of operating by means of its
own built-in power supply connected to 117V nominal ac (105 to 130V)
50/60 Hz (230V nominal ac, 207 to 253V ac, 50 Hz where applicable).
Power consumption shall be 12.5 Watts. The DDL shall be Listed by
Underwriters Laboratories Inc. (UL) or other equivalent nationally recognized safety testing agency.
The unit shall be a Symetrix Incorporated model 402 Dual
Output Delay.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA • Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
SX208 Stereo Compressor/Limiter
HE SX208 STEREO COMPRESSOR/LIMITER is a true stereo dynamic range controller offeri ng both
studio sonic performance and ease of operation at a very economical price.
T
Like all Symetrix compressor/limiters, the half rack sized SX208 gives full sized performance with
no objectionable side effects sometimes associated with dynamic range controllers. The heart of
the SX208 is built around an industry standard high performance VCA enabling a dynamic range in excess
of 110 dB with a typical distortion of less than .03%.
Ease of Operation
By eliminating redundant controls found on
competing designs, the SX208 is a step ahead in
usability and reliability. Three LED's "tell" the
operator when the input signal is below threshold,
"right on the money" or too "hot".
SX208 response times (release) are program
controlled. The incoming signal itself determines
how the unit will behave. Responding quickly to
transients and gently to longer term level changes,
the SX208 combines the advantages of both RMS
and peak detection circuitry. A front panel
Fast/Slow response time switch works in
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conjunction with the program controlled
Features
• Exceptionally low noise and distortion
• Simple straightforward operating controls
• LED indicators for Input level, compression,
and clipping
• Balanced or unbalanced signal connection
• UL approved power supply
SYST£M
circuitry to adapt to various material
types- fast for percussive sounds, slow for
smoother signals like vocals or speech.
Optional SX200 Series Accessories:
SC-2 Security Cover - security cover/filler pane
PS-2 Power Supply - replacement power supply
RM-2 Rack Mount - 19' rack mounting shelf
Specifications
Input
Impedance
Maximum Input Level
Balanced Input CMRR
Output
Source Impedance
Maximum Output Level
balanced bridging
>10 kilohms
+18 dBu
>40 dB at 1 kHz
balanced
300 ohms unbalanced, 600 ohms balanced
+20 dBm, 600 ohms, balanced
+17 dBm, 600 ohms, unbalanced
THD+N
Signal to Noise Ratio
Dynamic Range
Visual Indicators
Connectors
Physical
Size
.03%,+4 dBm, 1 kHz
Frequency Response
20 Hz to 20 kHz, +0,-1 dB
Compressor/limiter
Max. Attack
Min. Attack
Max. Release
Min. Release
Ratio
Max. Gain Reduction
Soft-knee transition characteristic
12 dB/ms
6 dB/ms
10 dB/ms
1 dB/ms
1:1 to 20:1
40 dB
Controls
System Bypass, Input Gain, Ratio,
Response nme Output
Greater than 92 dB
Shipping Weight
Power Requirements
Accessories
PS-2
RM-2
SC-2
110 dB
Threshold, Output Clip, Gain Reduction
Inputs and Outputs: 1/4' TRS Phone Jax
1/2 rack unit
Chassis 1.5'H x 8.2-W x 6'D
Front Panel 8.5-W x 1.75'H
5 lbs
16V ac, 200 ma (Symetrix PS-2 supplied)
(Symetrix PS-2 for 11 0V ac operation,
PS-2EP for 220V ac operation)
Spare power supply
Two-unit standard 19' rack mount
Security Cover
\C1995 Symetrix, Inc. Specifications subject to change without notice.
Symetrlx Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA • Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
SX204 Headphone Amplifier
Applications
STUDIO RECORDING
Drive four sets of phones
Independently, or drive many
sets of medium to high
Impedance phones simultaneously (up to 240 total pairs
of 600-ohm phones)
DISPLAYS
Active museum displays,
point-of-sale displays, audio
guided tours, etc.
BROADCAST
Drive phones loudly enough
to penetrate even the most
hardened air personalltles
REMOTERECORDING
Drive phones loud enough to
overcome headphone leakage
EDUCATIONAL
An Inexpensive, durable
way to provide a headphone distribution system
for A/V learning facllltles
IN-EAR MONITORS
On stage monitoring using
ear-worn ear speakers
SX
SERIES
HE MODEL SX204 HEADPHONE AMPLIFIER is a 1-in 4-out amplifier designed to drive multiple
headphones of any impedance. Symetrix' proprietary high voltage converter technology gives the
SX204 the ability to drive high impedance headphones with the equivalent output voltage of a
much larger power amplifier, yet provides more than ample current for low impedance phones.
The four stereo outputs automatically adjust output power to accommodate different load impedances.
T
Each of the four outputs has its own set of amplifiers, each with its own output control. Independent
amplifiers allow mixing and matching totally different headphone types.
Features
Controls provided are input level, output level for
each individual amplifier, and a stereo/mono switch.
• Four independent stereo outputs driven from
one stereo input
The Stereo/Mono switch allows the amplifier to be
used several ways. As a "normal" stereo amplifier
(with four outputs), the left and right inputs are used
for stereo signals, which feed the left and right outputs. Switching to mono with a stereo input provides
a quick check of the mono compatibility of a stereo mix.
• Drives high- or low-impedance headphones
• Stereo or mono operation
• Capable of > 50V peak-to-peak output swing
into 2000-ohm load
• Individual level controls for each output
As a mono amplifier, one signal fed to either input
will feed both outputs. Also in mono mode, when
two different mono signals are fed to the left and
right inputs, they will be combined to feed both the
left and right outputs.
• Master Input level control
• Balanced or unbalanced signal connection.
• UL approved power supply
The inputs are electronically balanced, but will
operate normally in an unbalanced configuration
when 2-conductor ¼' plugs are inserted. The
outputs are ¼' stereo connectors.
!lvt.-tx
Since the SX204 has a hatt-rack width
chassis, two such units may be mounted in
a single 1.75" rack space, giving eight individually controlled stereo headphone outputs.
=~Q..... ~? <? ~ -~--~--~-~-:
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Optional SX200 Series Accessories:
SC-2 Security Cover - security cover/filler pane
PS-2 Power Supply - replacement power supply
RM-2 Rack Mount - 19" rack mounting shelf
_,.W::1\.MOfltl'l'CYIDC. ILlffl.l. . . Ull
MJWXII.CJ0CWI.... ICIWfllll'l'C,l&f"""I
Specifications
Inputs
Impedance
Input Connector
Max Input Level
Outputs
Maximum output level
Output Connectors
4 each, low-Z, 160-ohm source impedance
>50V peak-to-peak into 2000 ohms
'!." stereo (x4)
Power Requirements
16Vac, 200 ma
(Symetrix PS-2, included)
Audio Performance
Frequency Response
THD+N
OSymetrix
STEAM POWERED RADIO.COM
Bridging, balanced/unbalanced, transformerless
>1Okilohms/leg
¼" Tip-Ring-Sleeve
+18 dBu
20 Hz to 20 kHz, +O, •1 dB
.01 % (1 kHz, OdBm, 600 ohms)
.02% (1 kHz, +24 dBm, 600 ohms)
Signal to Noise Ratio
Gain
Physical
Size
Size (HWD)
Weight
Accessories
PS-2
RM-2
SC-2
95 dB
20dB
½ rack unit
1.75 X 8.5 X 6.5 in
2.5 lbs
Spare power supply
Two-unit standard 19" rack mount
Security Cover
©1995 Symetrix, Inc. Specifications subject to change without notice.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 ·USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
SX202 Microphone Preamplifier
HE MODEL SX202 DUAL MICROPHONE PREAMPLIFIER is an ultra clean two channel stereo/mono
preamp, intended for use in the most critical digital and analog recording situations. In addition, the
SX202 is ideally suited for broadcast use, and for general purpose paging or public address applications.
T
Used in place of older preamp designs, the SX202 offers substantial sonic improvements with its
solid stereo imaging (less than 1Odegrees phase shift at 20 kHz), excellent transient handling (its positive
and negative slew rates are symmetrical), very low noise (approaching the theoretical limit), and almost
unmeasurable distortion (.007%).
Features
Its unique combination of features and performance
make the SX202 a very versatile product, designed
to deliver superior performance in a wide variety of
circumstances. Variable gain inputs, with 15 dB
pads, allow the SX202 to handle any input up to 14
dBV. Switchable +48 volt phantom power is included
for professional condenser microphones. One
channel is equipped with a polarity switch, to correct
for improperly wired cables or unresolvable mic
placement problems. In addition to the individual
outputs from each preamp, a left + right output is
included to provide a combined mono feed.
• Input levels to +14 dBV Left/Right and Left
+ Right outputs
• Uncompromising sonic performance
• +48 volt phantom powering
• Polarity reversal
• Compact (¼ rack) and lightweight
• UL approved power supply
Optional SX200 Serles Accessories:
SC-2 Security Cover - security cover/filler pane
PS-2 Power Supply - replacement power supply
RM-2 Rack Mount - 19' rack mounting shelf
0
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.
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OUT &
----Specifications
Inputs
Type
Input Impedance
Maximum Input Level
Connector
Clip Indicators
Frequency Response
low-Z balanced, transformerless
>3 kilohms
+14 dBV (with pad)
XLR-3
red LED's, fire 4 dB below clipping
20 Hz to 20 kHz, +O dB, •1 dB
0.007% (1 kHz, OdBm, 600 ohms)
0.01 % (1 kHz, +24 dBm, 600 ohms)
THD+N
Maximum Gain
60 dB
Minimum Gain
20 dB
Outputs
Type
Output Source Impedance
Maximum Output Level (600 ohms)
Connectors
Power Requirements
Signal to Noise Ratio
EIN
low·Z
600 ohms balanced
300 ohms unbalanced
+24 dBm balanced
+18 dBm unbalanced
1/4' TRS balanced/unbalanced
16V ac, 200 ma (Symetrix PS-2 supplied)
95 dB (·50 dBV, 150 ohms)
·128 dBm (150-ohm source, 20 Hz to 22 kHz 60 dB gain)
Phantom Power (DIN 45 596)
+48V
Physical
Size
Size (HWD)
½ rack unit
1.75 X 8.5 X 6.5 in
0 1995 Symetrix, Inc. Specifications subject to change without notice.
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 • USA• Tel: (206) 787-3222 • FAX: (206) 787-321 1• e-mail: [email protected]
STEAM POWERED RADIO.COM
SX201 Parametric EQ/Preamp
Applications
PARAMETRIC EQUALIZER
Use the SX201 for a problemsolvlng channel-Insert EQ for
curves that are beyond the
capablllty of your console's
channelEQ
BALANCED LINE DRIVER
Use the SX201 's balanced
output to drive long lines
INSTRUMENT PREAMP
The Instrument Input's 30 dB
gain make It Ideal for unbalanced, low-level, Instrument
sources. The SX201 Is an Ideal
"front end" for a studio-grade
Instrument preamp
HE SX201 EQ/PREAMP provides studio-quality equalization for line level balanced or unbalanced
signals, as well as for low level unbalanced signals. Three fully parametric bands of equalization
are provided, with +15 dB boost and -30 dB cut capability, allowing the SX201 to be used for both
creative and corrective equalization. Overlapping frequency controls cover the entire audio range,
from 16 Hz to 20 kHz. Bandwidth is continuously variable from .05 octaves (for deep notch filtering) , to
3.3 octaves (for smooth tone shaping).
T
The separate line and preamp inputs allow the SX201
to handle nearly any signal level. The line level input
provides both balanced or unbalanced terminations,
while the preamp input is unbalanced. The line level
input is intended for use with signals that have
already passed through a preamplifier. The preamp
input provides 30 dB gain, and is intended for use
with low-level signals such as those from synthesizers, guitars, bass guitars, or electronic drums. An
overall input level control allows setting internal signal levels to match the current boosVcut conditions.
Features
• Input levels to +14 dB Left/Right and Left
+ Right output
• Studio quality
• Three-band parametric equalizer with peak/
notch characteristic
• Balanced line or instrument inputs
• Balanced and unbalanced outputs
• UL approved power supply
Optional SX200 Series Accessories:
SC-2 Security Cover - security cover/filler pane
PS-2 Power Supply - replacement power supply
RM-2 Rack Mount - 19" rack mounting shelf
s.ut, PARAMETNC IE.CWREAMP
SX
00 00
SERIES
Specifications
Line Input
low-Z balanced/ unbalanced transformerless
input Impedance >20k
Frequency Response
THO+N
Max Input Level
Preamp Input
+18 dBu
SIN
Max Input Level
Parametric EQ
BoosVCut
Bandwidth
Frequency Range
Frequency Response
Band Ranges
OSymetrix
STEAM POWERED RADIO.COM
0.025%, 2 kHz, +18 dBm
101 dB @full output
universal low-Z/high-Z unbalanced
Outputs
Input Impedance
20 Hz to 20 kHz, +O, •1 dB
active balanced and unbalanced
>20k
Source Impedance
100 ohms, balanced
50 ohms, unbalanced
Maximum Output
+24 dBm, balanced
+18 dBm, unbalanced
-12 dBu, 20 mV
peak/notch curves
+15 dB, -30 dB
variable, 0.05 to 3.3 octaves
16 Hz to 22 kHz, in 3 overlapping bands,
5 octave range/band
20 Hz to 20 kHz, +O, -1 dB
Low: 16 to 512 Hz, Mid: 196 Hz to 6.3 kHz
High: 686 Hz to 22 kHz
Power Requirements
Accessories
Physical
Size
Size (HWD)
16Vac, 200 ma (Symetrix PS-2 supplied)
RM-2 two-unit standard 19" rack mount
¼ rack unit
1.75 X 8.5 X 6.5 in
©1995 Symetrix. Inc. Specifications subject to change without notice.
Symetrix Inc. • 14926 35th Ave. W. • Lynnwood, WA 98037 ·USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
551E Five Band Parametric EQ
s
uperior fidelity, flexibility, power, and precision. That's what sets the 551E Five Band Parametric
Equalizer apart from the rest Delivering an unbeatable combination of wide dynamic range, ultra-low
distortion, minimal phase shift and ringing, easy to use controls, and rock-solid construction, the 551 E
is leap forward in equalizer technology.
The five, fully parametric EQ bands are identical in
function. Each delivers up to 12 dB of boost and 20 dB
of cut, has an adjustable bandwidth control (from .05
octaves to 2 octaves), and a frequency control range
from 10 Hz to 20 kHz. Use each band anywhere in the
audio spectrum, not just the pre-selected ranges you
find on most equalizers. This can be very useful In sound
system work, among other things. For instance, you can
use three bands to correct low frequency problems and
still have two bands left for midrange and high
frequency work.
You'll find the 551 Eis just as useful for recording and
broadcast applications. The wide control range allows
you to perform creative as well as corrective
equalization. Sweetening vocal tracks, getting that
huge drum sound, disk mastering, or perfecting your
radio station's signature sound are the kinds of tasks
that are well within the 551E's capability.
As for sonic quality... Qur proprietary UltraQ™
topology delivers e><tJ:emely low noise audio performance - the kind ou would normally expect only
from a much more expensive unit. We've also
included a servo balanced output that completely
removes all DC offset Direct-coupled input and output
stages maximize the 551 E's low-frequency response
while minimizing noise and distortion.
Inside and out, the 551 E is designed to stand up to the
worst road abuse. The tour-worthy all steel chassis
houses a double-sided fiberglass circuit board - unlike
the flimsy phenolic PCBs found in most budget priced
units. Gold plated XLR connectors, a bypass relay, and
high precision components ensure accuracy and
reliability. Last, but not least, the 551 E has an internal
power supply with a detachable cord.
If you are an engineer in concert sound, installed
systems, recording, or broadcast, contact your
nearest Symetrix dealer today. See for yourself why
the audiophile performance and uncompromising
design of the 551 E Five Band Parametric Equalizer
make it the right choice for any professional audio
application.
Features
• UltraQ topology delivers extremely low noise
and distortion.
• Five identical, fully overlapping EQ bands.
• High cut and low cut filters.
• Servo balanced output (eliminates DC offset).
• Direct coupled Inputs and outputs (superb low
frequency response).
• Internal power supply with detachable cord.
®
Underwrlte11
La~~~torles Inc ••
CE
Symetrix Inc.• 14926 35th Ave. W. • Lynnwood, WA 98037 ·USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
551 E Five Band Parametric EQ
551 EfM MMD,AAAllffl/llC lOLIAUZD
OSymetrix
IWUACMEON
lYMffllOOO.WA,USA
Specifications
Maximum input level
Maximum output level
THD+Noise (1 kHz at +4dBu)
+21 dBu balanced
+21 dBu balanced
+17 dBu unbalanced
<0.002%
(<10 Hz to 30 kHz measurement bw)
-eq in, all bands flat
Signal to noise ratio
Dynamic range
Frequency Response
Input impedance
Output impedance
>96 dB (unweighted, ref to +4dBu)
-eq in, all bands flat
EQ band control specs:
Frequency control range
CuVBoost range
Bandwidth
Chassis size
Shipping weight
8 lbs, 3.64 kg
AC Requirments
via internal supply
117V ac, nominal, 95-130Vac, 50-60 Hz
230V ac, nominal, 165-255Vac, 50 Hz
>114 dB
-0.5 dB, -3dB (20Hz - 62 kHz)
1Ok ohms balanced, 5k ohms unbal.
600 ohms balanced, 300 ohms unbal.
1OHz - 20 kHz (inc. Frequency Switch)
-20 dB, +12dB
.05 oct - 2.0 oct
1.75'H x 19' W X 8' 0
4.45cm H x 48.3cm W x 20.3cm D
Power Consumption
15 watts, maximum
In the interest of continuous product improvement, Symetrix, Inc.
reserves the right to alter, change, or modify these specifications
without prior notice.
Copyright, 1996, Symetrlx, Inc. All rights reserved.
Architects and Engineers Specifications
The parametric Equalizer (EQ) shall be a single channel unit that shall
provide five independent filter bands. There shall also be separate
highpass and lowpass filters. The unit shall occupy one rack space (1 U).
Each filter band shall have the following controls and control ranges: a
cuVboost control with a-20 dB - +12dB range, afrequency sweep control
with a100 Hz · 2kHz range, afrequency range multiplier switch with X10,
X1 , and 0.1 settings, and a bandwidth control with a .05 octave - 2.0
octave range. There shall also be a 12 dB/Oct highpass filter with a user
adjustable cutoff frequency range 6Hzto 260 Hz, and a12 d8/0ct low pass
filter with acutoff frequency range from 3kHzto 65 kHz. Afront panel input
level control shall provide ±15 dB of gain adjustment.
When the unit is inoperative (either by loss of power or via the BYPASS
switch), the inputs and outputs will be wired together by a relay.
The frequency response with all filter bands flat, EO in, highpass and
lowpass set to the outside extremes of their ranges shall be 20Hz - 62 kHz
(-0.5, -3dB). The total harmonic distortion plus noise shall be less than
0.002% (EQ in, all bands flat). The dynamic range shall be greater than
114 dB. The EQ shall accept a maximum input signal of +21 dBu and have
a maximum output level of greater than +21 dBu. There shall be a front
panel clip indicator that will illuminate at 1dB below clipping. It shall
monitor the input, output and each EQ band.
The inputs shall be direct coupled, active balanced designs terminated
with 3-pin XLR (AES/IEC standard wiring), and ~ TRS female. The Input
circuitry shall incorporate RFI filters. There shall be a servo-balanced,
direct-coupled output that shall terminate in 3-pin XLR (AES/IEC standard wiring) and ~ TRS.
The EO shall be capable of operating by means of its built-In power supply
connected to 117V nominal AC, 105-130V, 50-60 Hz (230V nominal AC,
207-253V, 50 Hz where applicable). Power consumption shall be 15
watts maximum. There shall be a rear panel receptacle for an IEC type
detachable power cord. The EQ shall be UL and CE approved.
The unit shall be aSymetrix Incorporated model 551 EFive Band Parametric Equalizer.
Symetrix Inc.· 14926 35th Ave. W. • Lynnwood, WA 98037 · USA· Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
1996 Suggested Retail Price List
Effective September 1, 1996
Symetrix Inc.· 14926 35th Ave. W. • Lynnwood, WA 98037 • USA · Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
OSymetrix
1996 Retail Price List
610 Broadcast Audio Dellli.~
620 20 Bit AID eon,udill.._,,_,·,~--~
572
571
571
551E
528
Peak-RMS~--501
501-01 Peak-RMS ;oq.,._~ -
..---------,·4 00 SERi ES - - - - 488
DYNA-Bq.,..re
450
425
422
Stereo Power Amc-~t;t~ .,.,..,_"'·~~~--,._.
Dual Output Delay
- - - SX200 SERi ES, - - SX204 Headphone AmDJlffler•
SX202
Dual Mic/PreantlDllllw
-------.ACCESSORi ES- - - - usc-1 un1veru1 Security Cover
SC-2 Security Cover
PS-2
RM-2
PowerSupply
Rack Mount
All prices subject to change without notice . C1996 Symetrix, Inc. Effective September 1, 1996.
STEAM POWERED RADIO.COM
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City
Company
Telephone
FAX
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AUSTRALIA
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514 8561920
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Audio & Video Wholesalers
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02234 74004
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18512848
514 8561919
2530374
562 223 4310
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224 810970
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095 9782016
026691252
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609620933
34735818
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019104141
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23732722
212 2604514
01932 882222
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34732635
08824476
019103544
0117879627
22982396
23732722
212 2602309
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22391607
International Representatives
l.ocltlon
Coulltry
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Telephone
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EUROPE
England
World Marketing Ltd.
01637 877170
01637 850495
Please note: The above listed telephone and fax numbers are given in the international format (as they would be dialed from inside the country).
United States Representatives
Company
Aldridge Marketing
Applied Audio Marketing, Inc.
Audio Associates
Cambridge Marketing Group
Darmstedter Associates Inc
Derek Allen Associates
JAMM Distributing
Loppnow & Associates
Michael Chafee Enterprises
On The Road Marketing
Pro Tech Marketing Inc.
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Trankle & Associates
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(813) 921-4294
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(713) 528-1239
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(206) 392-3973
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MD, DE, DC, VA, PA, WV
OH
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South CA, AZ, HI, South NV
Ml, IL, IN, WI, MN, KY
WA, OR, West ID, West MT, AK
FL
NY, CT, MA, ME, VT, NH, NJ, RI
CO, UT, WY, NM, East ID, East MT
KS, NE, MO, ND, SD, IA
North CA, North NV
Symetrix Inc. · 14926 35th Ave. W. • Lynnwood, WA 98037 • USA • Tel: (206) 787-3222 • FAX: (206) 787-3211 • e-mail: [email protected]
STEAM POWERED RADIO.COM
STEAM POWERED RADIO.COM
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