Peavey VSX II Owner Manual
VSX II™
Electronic Crossover
For more information on other great Peavey products, go to your local Peavey dealer or online at www.peavey.com.
Intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
Intended to alert the user of the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the product.
CAUTION: Risk of electrical shock — DO NOT OPEN!
CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside.
Refer servicing to qualified service personnel.
WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture.
Before using this appliance, read the operating guide for further warnings.
Este símbolo tiene el propósito, de alertar al usuario de la presencia de “(voltaje) peligroso” sin
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operación y mantenimiento en la información que viene con el producto.
PRECAUCION: Riesgo de descarga eléctrica ¡NO ABRIR!
PRECAUCION: Para disminuír el riesgo de descarga eléctrica, no abra la cubierta. No hay piezas útiles
dentro. Deje todo mantenimiento en manos del personal técnico cualificado.
ADVERTENCIA: Para evitar descargas eléctricas o peligro de incendio, no deje expuesto a la lluvia o
humedad este aparato Antes de usar este aparato, Iea más advertencias en la guía de operación.
Ce symbole est utilisé dans ce manuel pour indiquer à l’utilisateur la présence d’une tension dangereuse
pouvant être d’amplitude suffisante pour constituer un risque de choc électrique.
Ce symbole est utilisé dans ce manuel pour indiquer à l’utilisateur qu’il ou qu’elle trouvera d’importantes
instructions concernant l’utilisation et l’entretien de l’appareil dans le paragraphe signalé.
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l’intérieur aucune pièce pouvant être reparée par l’utilisateur. Confiez I’entretien et la réparation de
l’appareil à un réparateur Peavey agréé.
AVERTISSEMENT: Afin de prévenir les risques de décharge électrique ou de feu, n’exposez pas cet
appareil à la pluie ou à l’humidité. Avant d’utiliser cet appareil, lisez attentivement les avertissements
supplémentaires de ce manuel.
Dieses Symbol soll den Anwender vor unisolierten gefährlichen Spannungen innerhalb des Gehäuses
warnen, die von Ausreichender Stärke sind, um einen elektrischen Schlag verursachen zu können.
Dieses Symbol soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam
machen, die Handhabung und Wartung des Produkts betreffen.
VORSICHT: Risiko — Elektrischer Schlag! Nicht öffnen!
VORSICHT: Um das Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen. Es
befinden sich keine Teile darin, die vom Anwender repariert werden könnten. Reparaturen nur von
qualifiziertem Fachpersonal durchführen lassen.
ACHTUNG: Um einen elektrischen Schlag oder Feuergefahr zu vermeiden, sollte dieses Gerät nicht dem
Regen oder Feuchtigkeit ausgesetzt werden. Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.
2
IMPORTANT SAFETY INSTRUCTIONS
WARNING: When using electrical products, basic cautions should always be followed, including the following:
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Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with a dry cloth.
Do not block any of the ventilation openings. Install in accordance with manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including amplifiers)
that produce heat.
Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one
wider than the other. A grounding type plug has two blades and a third grounding plug. The wide blade or third prong is
provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the
obsolete outlet.
Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point
they exit from the apparatus.
Note for UK only: If the colors of the wires in the mains lead of this unit do not correspond with the terminals in your
plug‚ proceed as follows:
a) The wire that is colored green and yellow must be connected to the terminal that is marked by the letter E‚ the earth
symbol‚ colored green or colored green and yellow.
b) The wire that is colored blue must be connected to the terminal that is marked with the letter N or the color black.
c) The wire that is colored brown must be connected to the terminal that is marked with the letter L or the color red.
Only use attachments/accessories provided by the manufacturer.
Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a
cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
Unplug this apparatus during lightning storms or when unused for long periods of time.
Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any
way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
Never break off the ground pin. Write for our free booklet “Shock Hazard and Grounding.” Connect only to a power
supply of the type marked on the unit adjacent to the power supply cord.
If this product is to be mounted in an equipment rack, rear support should be provided.
Exposure to extremely high noise levels may cause a permanent hearing loss. Individuals vary considerably in susceptibility to noise-induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently intense noise
for a sufficient time. The U.S. Government’s Occupational Safety and Health Administration (OSHA) has specified the
following permissible noise level exposures:
Duration Per Day In Hours
8
6
4
3
2
1 1⁄2
1
1
⁄2
1
⁄4 or less
Sound Level dBA, Slow Response
90
92
95
97
100
102
105
110
115
According to OSHA, any exposure in excess of the above permissible limits could result in some hearing loss. Ear plugs or protectors to the
ear canals or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss, if exposure
is in excess of the limits as set forth above. To ensure against potentially dangerous exposure to high sound pressure levels, it is
recommended that all persons exposed to equipment capable of producing high sound pressure levels such as this amplification system be
protected by hearing protectors while this unit is in operation.
SAVE THESE INSTRUCTIONS!
3
ENGLISH
VSX II ™
Electronic Crossover
You’ll be pleasantly surprised with all the new features loaded in the VSXII. Whether you’re an experienced user or not‚ you’ll
find this crossover easy to use and understand. The unit is visually designed using color coding to denote functionality. Easy to
set up and use‚ the VSXII is a single rack space‚ 2-way stereo/3-way mono crossover with an independent mono—100 Hz
subwoofer output. With gain control‚ low- and high-frequency level controls‚ adjustable crossover control (60 Hz–6 kHz @
24 dB per octave), 1/4" and XLR in/out and a 40 Hz LCF (24 dB per octave)‚ this is one of the most versatile crossovers in the
industry.
Please read this guide carefully to ensure your personal safety as well as the safety of all your equipment.
Features
· 2-way stereo/3-way mono electronic crossover network
· independent 100 Hz mono subwoofer output
· fourth order Linkwitz-Riley filters
· crossover frequency range 60 Hz to 6 kHz (24 dB/octave)
· front panel 2-way mono/3-way stereo mode switch with LED selection indicators
· mute and polarity switches on low and high frequency outputs
· signal presence (-22 dBu) and clip/mute LEDs on low and high frequency outputs
· input and output level trim controls (+/-20 dB) with unity gain detent
· adjustable high frequency horn equalization (0 to +12 dB)
· switchable 40 Hz (24 dB/octave) low-cut filter on inputs
· XLR, 1/4" phone and Euro screw terminal connections (balanced or unbalanced)
· 1U single rack space design
4
FRONT PANEL
(1) Gain 1
Used to optimize the interface gain between the VSX II Channel 1 and the associated mixer. Control range is
-20 dB to +20 dB with Unity gain at center (detent) position. In mono MODE Gain 1 is the only channel gain
control.
Operation Note
The default (0dB) setting (center detent on all controls) should be considered normal for many applications.
However, adjustments in the - (negative) direction will reduce system noise. Settings in the + (positive)
direction will improve headroom with mixers having output capability less than +22 dBu, at the expense of
added system noise.
In applications requiring low system noise, such as studios, churches, etc., and where headroom is not critical,
the noise level can be improved by operating the VSXII gain levels below 0 dB. Example: A setting of -6 dB will
reduce system noise by 6 dB. At the same time, system headroom will have been reduced by 6 dB. Such
“compromises” should be considered normal in noise sensitive applications.
System headroom can be substantially increased with the VSXII in applications where the mixer output is less
than +22 dBu. To accomplish this, the optimum gain setting will usually be the difference between the VSXII
output rating (+22 dBu) and the mixer output rating. Example: If the mixer output rating is +14 dBu, the VSXII
gain should be set at +8 dB (22–14 = +8 dB). If the mixer output rating were 22 dBu, the correct setting would
be 0dB. For mixers with output capability at +22 dBu or higher, gain settings above 0 dB will not improve
headroom but will increase system noise.
(2) Low Cut Filter (LCF 1)
Provides a 24 dB per octave roll-off at 40 Hz to reduce subsonic rumble and to protect the low speaker from
operating below its cut-off frequency. Affects both, the Low and High frequency bands. When not engaged, the
low-end roll-off frequency is below 10 Hz.
(3) Low 1 Polarity Switch
When engaged reverses the polarity of the signal in the Low frequency band to speed up trouble shooting and
assure proper phase response of the audio system.
5
(4) Signal Present LED
This green LED indicates the presence of a signal higher than -22 dBu in the LOW 1-band even if the band is
muted.
(5) Low 1 Mute Switch
When engaged eliminates the signal in the LF1 band, to help during installation of the audio system.
(6) Clip/Mute LED
This red LED indicates when the signal level in the LF1 frequency band is approaching the maximum available
headroom of +22 dBu. It illuminates when the band signal reaches approximately +20dBu. In Mute mode this
LED illuminates continuously.
(7) Low 1 Band Level Control
Each band-pass section features a level control to compensate for the various loudspeaker efficiency ratings.
The Low 1 Level has +/-20 dB range and unity gain (default) at the center detent position. In Mono MODE, LOW
1 is the only LOW level control.
(8) Low to High Crossover Frequency Controls
The VSXII two outputs per channel are derived from a fourth-order, Linkwitz/Riley, state variable filter (24 dB
per octave slope). Each filter is independent, with the crossover frequency selected via a recessed knob, rotary
control, to prevent accidental changing of the critical crossover frequency. Control range is from 60 Hz to 6 kHz
and determines the -6 dB crossover point between the low- and high-frequency bands within the channel. In
mono MODE this control determines the crossover point between the LOW and MID frequency bands.
(9) High 1 Band Level Control
Each band-pass section features a level control to compensate for the various loudspeaker efficiency ratings.
The HIGH 1 Level has +/-20 dB range and unity gain (default) at the center detent position. In Mono MODE,
HIGH 1 is not used.
(10) CD Horn EQ Boost
Adjusts the amount of boost within the HF band to compensate for the frequency roll-off and lost of efficiency
with some compression drivers. The screwdriver shaft control provides a variable boost from 0 dB to +12 dB at
20 kHz, with first-order slope and excellent phase response.
(11) High 1 Polarity Switch
When engaged‚ reverses the polarity of the signal in the HIGH 1 frequency band to speed up trouble shooting
and assure proper phase response of the audio system.
(12) Signal Present LED
This green LED indicates the presence of a signal higher than -22 dBu in the HIGH 1-band even if the band is
muted.
(13) High 1 Mute Switch
When engaged eliminates the signal in the HIGH 1 band, to help during the install of the audio system.
(14) Clip/Mute LED
This red LED indicates when the signal level in the HIGH 1 frequency band is approaching the maximum
available headroom of +22 dBu. It illuminates when the band signal reaches approximately +20 dBu. In Mute
mode this LED illuminates continuously.
6
(15) Stereo 2-way or Mono 3-way Mode Switch
Determines the unit’s MODE of operation. When this switch is disengaged, VSXII is configured as a twochannel, 2-way, stereo crossover. When this switch is depressed, VSXII is configured as a single channel, 3way, mono crossover.
(16) Stereo Mode LED Indicator
This yellow LED blinks (1Hz) continuously when the VSXII is in stereo mode. It also indicates the control
functions for this MODE are depicted on the upper white strip.
(17) Mono Mode LED Indicator
This yellow LED blinks (1 Hz) continuously when the VSXII is in mono mode. It also indicates the control
functions for this MODE are depicted on the lower white strip.
(18) Gain 2
Used to optimize the interface gain between the VSXII Channel 2, and the associated mixer. Control range is
-20 dB to +20 dB with Unity gain at center (detent) position. In mono MODE Gain 2 is not used.
(19) Low Cut Filter (LCF 2)
Provides a 24 dB per octave roll-off at 40 Hz to reduce subsonic rumble and to protect the low speaker from
operating below its cutoff frequency. Affects both, the Low and High frequency bands. When not engaged,
the low-end roll-off frequency of Channel 2 is below 10 Hz. In mono MODE this filter is not operable.
(20) Low 2 Polarity Switch
When engaged‚ reverses the polarity of the signal in the Low frequency band to speed up trouble shooting
and assure proper phase response of the audio system.
(21) Switch Present LED
This green LED indicates the presence of a signal higher than -22 dBu in the LOW 2-band even if the
band is muted.
(22) Low 2 Mute Switch
When engaged‚ eliminates the signal in the LOW 2 band, to help during installation of the audio system.
(23) Clip/Mute LED
This red LED indicates when the signal level in the LOW 2 frequency band is approaching the maximum
available headroom of +22 dBu. It illuminates when the band signal reaches approximately +20 dBu. In
Mute mode this LED illuminates continuously.
(24) Low 2 Band Level Control
Each band-pass section features a level control to compensate for the various loudspeaker efficiency
ratings. The Low 2 Level has +/-20 dB range and unity gain (default) at the center detent position. In Mono
MODE, LOW 2 is the MID band level control.
(25) Low to High Crossover Frequency Controls
The VSXII two outputs per channel are derived from a fourth-order, Linkwitz/Riley, state variable filter
(24 dB per octave slope). Each filter is independent, with the crossover frequency selected via a recessed
knob, rotary control, to prevent accidental changing of the critical crossover frequency. Control range is
from 60 Hz to 6 kHz and in stereo MODE determines the -6 dB crossover point between the low and high
frequency bands within channel 2. In mono MODE this control determines the crossover point between the
MID and HIGH frequency bands.
7
(26) High 2 Band Level Control
Each band-pass section features a level control to compensate for the various loudspeaker efficiency ratings.
The HIGH 2 Level has +/-20dB range and unity gain (default) at the center detent position. In Mono MODE,
HIGH 2 is the only HIGH level control.
(27) CD Horn EQ Boost
Adjusts the amount of boost within the HIGH band to compensate for the frequency roll-off and lost of
efficiency with some compression drivers. The screwdriver shaft control provides a variable boost from 0 dB to
+12 dB at 20 kHz, with first-order slop and excellent phase response.
(28) High 2 Polarity Switch
When engaged‚ reverses the polarity of the signal in the HIGH 2 frequency band to speed up trouble shooting
and assure proper phase response of the audio system.
(29) Signal Present LED
This green LED indicates the presence of a signal higher than -22 dBu in the HIGH 2-band even if the band is
muted.
(30) High 2 Mute Switch
When engaged eliminates the signal in the HIGH 2 band, to help during installation of the audio system.
(31) Clip/Mute LED
This red LED indicates when the signal level in the HIGH 2 frequency band is approaching the maximum
available headroom of +22 dBu. It illuminates when the band signal reaches approximately +20 dBu. In Mute
mode this LED illuminates continuously.
(32) Power Switch
Toggle this push-button to turn the unit ON or OFF.
(33) Power LED
This blue LED illuminates when the VSXII is powered on.
Operation Note
Always check for proper system connections before applying power. Upon initial hook-up, mute all
bands and set all the band-pass level controls to minimum (-20 dB) position before applying power;
then slowly bring up the various levels to verify proper band-pass connections. An improperly wired
system could destroy loudspeakers.
8
REAR PANEL
All Inputs and Outputs are electronically balanced (Pin 2 positive). Each Input or Output has three connector
options: XLR, 1/4" and 3-pin Euro. When a mono, TS 1/4" phone jack is inserted, this input (or output) becomes
unbalanced. Whenever possible‚ balanced connections are preferred.
(34) IEC Mains Connector
This is a standard IEC power connector. An AC mains cord having the appropriate AC plug and ratings for the
intended operating voltage is included in the carton.
Never break off the ground pin on any equipment. It is provided for your safety. If the outlet used does not
have a ground pin, a suitable grounding adapter should be used and the third wire should be grounded
properly. To prevent the risk of shock or fire hazard, always be sure that the VSXII crossover and all
associated equipment are properly grounded.
(35) Channel 1 Input
This is Channel 1 balanced input in stereo MODE. In mono MODE this is the unit’s only operable input.
(36) Channel 1 Low Output
Channel 1 low-pass frequency band output in stereo MODE. In mono MODE this is the unit’s only LOW
frequency output.
(37) Channel 1 High Output
Channel 1 high-pass frequency band output in stereo MODE. In mono MODE this output is not used
(inoperable).
(38) Subwoofer Output
Yields only the low frequency signals through a separate, fourth-order low-pass filter with a corner frequency
(-3 dB) at 100 Hz and a 24 dB/octave slope. Samples the Channel 1 and Channel 2 signals before the crossover
filters in stereo MODE or just Channel 1 signal in mono MODE. The 40 Hz low cut filters affect this output.
(39) Channel 2 Input
This is Channel 2 balanced input in stereo MODE. In mono MODE this input is not used (inoperable).
(40) Channel 2 Low Output
Channel 2 low-pass frequency band output in stereo MODE. In mono MODE this is the unit’s single channel MID
frequency output.
9
(41) Channel 2 High Output
Channel 2 high-pass frequency band output in stereo MODE. In mono MODE this output is the unit’s only HIGH
frequency band.
Operation Note
When a standard two conductor phone plug is inserted into a TRS jack, the system becomes unbalanced.
Such connection should be made only when the associated equipment is in close proximity to the VSXII.
The XLR input and 1/4" input are in parallel. If a two-conductor phone plug is used in the 1/4" jack, both
inputs become unbalanced. If a three-conductor phone plug is used to patch to associated equipment
which is unbalanced, the entire channel becomes unbalanced.
Setup Procedures
To achieve proper system set up and to provide good system performance and reliability, all the system
component (loudspeakers’) efficiency rating and crossover frequency values must be determined and used
according to the procedure described bellow. Special attention should be paid in mono, single-channel 3-way
MODE, so that the LOW-TO-MID crossover frequency control (8) will not be set higher than the MID-TO-HIGH
crossover frequency control (25).
Step 1:
The efficiency rating of the low frequency enclosure becomes the “reference efficiency” for the entire
system. The level control associated with this band-pass should always be set at 0 dB. Example: A
system’s low frequency component has an efficiency rating of 100 dB at 1 W, 1 M, 100 dB is the “reference
efficiency” for setup.
Step 2:
For 3-way systems, the MID band level (Channel 2 low) setting will be the difference in efficiency rating
between the low and mid components. Example: The system’s mid frequency component efficiency is 99 dB at
1 W, 1 M, 100–99 = +1 dB. The MID band level setting (Channel 2 low) should be +1 dB.
Step 3:
The HIGH band level setting will be the difference in efficiency rating between the low and high components.
Example: The system’s high frequency component efficiency is 106 dB at 1 W, 1 M, 100–106 = -6 dB. The HIGH
band level setting should be -6 dB.
Step 4:
The crossover frequency adjustment must be correct for the various components in the system. These values
are usually, but not necessarily, the cut-off frequencies of the associated loudspeakers. Crossover frequencies
are sometimes selected to improve the “power sharing” for a given sound system application. These selections
should never be below the cut-off frequency values.
Step 5:
For 2-way or 3-way system, the 40 Hz filter may be activated if desired. This feature protects subwoofers from
operating below their cut-off frequencies and preserves headroom.
Step 6:
Adjust the gain control as described in the gain section.
10
VSXII™ Electronic Crossover
SPECIFICATIONS
CONTROLS:
Channel Gain Control:
+/- 20 dB
LF and HF Gain Control:
+/- 20 dB
LCF:
-3 dB @ 40 Hz, 24 dB/octave
LF to HF Crossover Frequency:
60 Hz to 6 kHz, 24 dB/octave
CD Horn EQ (Adjustable):
0 to +12 dB @ 20 kHz, First order
Frequency Response:
Each output is -6 dB at the selected
crossover frequency due to the true
Linkwitz/Riley configuration.
Outputs are essentially flat within
their relative pass-bands.
LF Output:
+0 to -0.5 dB @ 10 Hz (40 Hz LCF off)
HF Output:
+0 to -0.5 dB @ 150 kHz
Subwoofer LPF Output:
0 dBu, -3 dB @ 100 Hz, 24 dB/
octave
(In 2-Way Mode: Ch 1 + Ch 2)
Maximum Input/Output Level:
+22 dBu, 10V RMS
All Gain controls @ 0 dB or lower
Total Harmonic Distortion
(+ Noise):
Less than 0.02% @ 0 dBu (20 Hz20 kHz)
Less than 0.002% @ +10 dBu (20 Hz20 kHz)
Hum and Noise:
(All level controls @ 0 dB, Crossover
control @ 1 kHz, 40 Hz LCF off,
22 Hz-22 kHz BW)
LF Output:
-100 dBu
Signal Clip/MUTE:
Red, +20 dBu, each frequency band
2-Way/3-Way MODE:
Yellow, Blinking, 1 Hz
Connectors:
All Inputs and Outputs
XLR—Balanced (pin 2 positive)
TRS 1/4" Phone Jack—Balanced
3-Pin Euro Connector
Power Requirements:
Domestic:
120 VAC 50/60 Hz, 15 W
Export:
230 VAC 50 Hz, 15 W
Weight and Dimensions:
HF Output:
-97 dBu
Outputs Muted:
-101 dBu
Input Impedance:
10 k Ohms Balanced/unbalanced
LED Indicators:
Signal present
Green, -22 dBu threshold, each
frequency band
11
Unpacked Weight:
7.5 lb (3.4 kg)
Unpacked W x D x H:
19 x 10 x 1.75 in
Packed Weight:
11 lb (5 kg)
Packed W x D x H:
23.4 x 18.9 x 2.75 in
VSXII Block Diagram
12
DEUTSCH
VSX II ™
Elektronische Frequenzweiche
Sie werden angenehm überrascht sein von all den neuen Funktionen, mit denen die VSX II ausgestattet ist. Ganz gleich, ob Sie
sich mit einem solchen Gerät auskennen oder nicht, diese Frequenzweiche ist leicht verständlich und einfach zu bedienen. Das
Gerät zeichnet sich durch sein visuelles Design aus – seine Funktionen sind farbig gekennzeichnet. Die VSXII, die sich einfach
installieren und bedienen lässt, nimmt nur eine Rack-Höhe in Anspruch und ist eine Zweiwege-Stereo-/Dreiwege-MonoFrequenzweiche mit einer unabhängigen Mono-Subwoofer-Leistung von 100 Hz. Mit Gain-Regelung, Nieder- und
Hochfrequenzpegelregelung, justierbarer Überschneidungsregelung (60 Hz bis 6 kHz bei 24 dB pro Oktave), 1/4"- und XLREingängen und -Ausgängen und einem 40 Hz-Tiefpassfilter (24 dB pro Oktave) ist sie eine der vielseitigsten Frequenzweichen,
die derzeit auf dem Markt sind.
Lesen Sie sich diese Anleitung bitte sorgfältig durch, damit sowohl Ihre Sicherheit als auch die Ihrer Ausrüstung gewährleistet
ist.
Merkmale
• Elektronische Zweiwege-Stereo-/Dreiwege-Mono-Frequenzweiche
• Unabhängige 100 Hz-Mono-Subwoofer-Leistung
• Linkwitz-Riley-Filter 4. Ordnung
• Überschneidungsfrequenzbereich von 60 Hz bis 6 kHz (24 dB/Oktave)
• Zweiwege-Stereo-/Dreiwege-Mono-Modusschalter auf der Vorderseite mit LED-Wahlanzeigen
• Mute- und Polarity-Schalter an Nieder- und Hochfrequenzausgängen
• LED-Anzeigen für Signalpräsenz (-22 dBu) und Clip/Mute an Nieder- und Hochfrequenzausgängen
• Feineinstellungen für Eingangs- und Ausgangspegel (+/-20 dB) mit arretierbarer Leistungsverstärkung
• Justierbarer Hochfrequenzhornabgleich (0 bis +12 dB)
• Schaltbarer 40 Hz-Tiefpassfilter (24 dB/Oktave) an den Eingängen
• XLR-, 1/4"-Phono- und Euro-Schraubklemmenanschlüsse (symmetriert bzw. unsymmetriert)
• Nimmt nur eine einzige Rack-Höhe in Anspruch
13
Funktionen an der Vorderseite
(1) Gain 1
Hiermit wird der Gain der Schnittstelle zwischen Kanal 1 der VSX II und dem zugehörigen Mischpult optimiert.
Der Regelbereich beträgt -20 dB bis +20 dB bei Leistungsverstärkung auf der mittleren (arretierten) Position.
Im Mono-MODUS ist Gain 1 die einzige Kanal-Gain-Regelung.
Hinweis zum Betrieb
Die Standardeinstellung (0 dB) (mittlere Arretierung bei allen Reglern) ist für viele Einsätze die übliche
Einstellung. Durch Justierung in die Richtung - (negativ) lässt sich jedoch Systemrauschen verringern.
Einstellungen in die Richtung + (positiv) verbessern zwar den Headroom bei Mischpulten, deren
Leistungsabgabe unter +22 dBu liegt, dies verstärkt jedoch wiederum das Systemrauschen.
Bei Einsätzen, die geringes Systemrauschen erfordern, wie etwa in Studios, Kirchen usw., und bei denen der
Headroom von geringerer Bedeutung ist, kann der Rauschpegel durch Herunterregeln der VSX II-Gain-Pegel
unter 0 dB verbessert werden. Beispiel: Bei einer Einstellung von -6 dB wird das Systemrauschen um 6 dB
verringert. Gleichzeitig wird der System-Headroom um 6 dB verringert. Bei Einsatzzwecken, bei denen der
Rauschpegel von Bedeutung ist, sollten solche „Kompromisse" als üblich erachtet werden.
Der System-Headroom kann für Einsatzzwecke, bei denen die Leistung des Mischpults unter +22 dBu liegt, mit
der VSX II deutlich gesteigert werden. Dazu muss die optimale Gain-Einstellung in der Regel der Differenz
zwischen der Ausgangsleistung der VSX II (+22 dBu) und der Ausgangsleistung des Mischpults entsprechen.
Beispiel: Beträgt die Ausgangsleistung des Mischpults +14 dBu, sollte der VSX II-Gain auf +8 dB eingestellt
werden (22 - 14 = +8 dB). Beträgt die Ausgangsleistung des Mischpults 22 dBu, wäre die korrekte Einstellung 0
dB. Bei Mischpulten mit einer Ausgangsleistung von +22 dBu oder mehr verbessern Gain-Einstellungen von
über 0 dB den Headroom nicht, sondern verstärken das Systemrauschen.
(2) Low Cut Filter (LCF 1 - Tiefpassfilter)
Mit diesem Schalter wird eine Dämpfung um 24 dB pro Oktave bei 40 Hz ermöglicht, mit der Brummen im
Unterschallbereich verringert und der Niederfrequenzlautsprecher vor dem Betrieb unter seiner Grenzfrequenz
geschützt wird. Dies gilt sowohl für Nieder- als auch für Hochfrequenzbänder. Ist dieser Schalter nicht aktiviert,
liegt die Dämpfung im unteren Bereich unter 10 Hz.
(3) Low 1 Polarity-Schalter
Ist dieser Schalter gedrückt, wird die Polarität des Signals im Niederfrequenzband umgekehrt, um die
Fehlersuche zu beschleunigen und um einen korrekten Phasenfrequenzgang des Audiosystems zu
gewährleisten.
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(4) Signal Present-LED
Diese grüne LED zeigt das Vorhandensein eines Signals von über -22 dBu im LOW 1-Band an, selbst wenn das
Band stummgeschaltet ist.
(5) Low 1 Mute-Schalter
Ist dieser Schalter gedrückt, wird das Signal im LF1-Band eliminiert, was bei der Installation des Audiosystems
behilflich ist.
(6) Clip/Mute-LED
Diese rote LED zeigt an, wenn der Signalpegel im LF1-Frequenzband den maximal verfügbaren Headroom von
+22 dBu erreicht. Sie leuchtet auf, wenn das Bandsignal etwa +20 dBu erreicht. Im Mute-Modus leuchtet diese
LED kontinuierlich auf.
(7) Low 1 Band Level-Regler
Jeder Bandpassbereich ist mit einem Pegelregler ausgestattet, um die verschiedenen Leistungswerte der
Lautsprecher auszugleichen. Der Low 1-Pegel hat einen Bereich von +/-20 dB, die Leistungsverstärkung
(Standard) befindet sich in der mittleren arretierten Position. Im Mono-MODUS ist LOW 1 die einzige LOWPegelregelung.
(8) Low to High Crossover Frequency-Regler
Die beiden Ausgänge pro Kanal der VSX II werden von einem Linkwitz-Riley-Universalfilter 4. Ordnung
abgeleitet (24 dB pro Oktavendämpfung). Jeder Filter arbeitet unabhängig, wobei die Überschneidungsfrequenz mit einem eingelassenen Drehknopf geregelt wird, um eine versehentliche Änderung der kritischen
Überschneidungsfrequenz zu verhindern. Der Regelbereich beträgt 60 Hz bis 6 kHz und legt den Überschneidungspunkt bei -6 dB zwischen den Niederfrequenz- und Hochfrequenzbändern innerhalb des Kanals fest. Im
Mono-MODUS wird mit diesem Regler der Überschneidungspunkt zwischen den LOW- und MIDFrequenzbändern festgelegt.
(9) High 1 Band Level-Regler
Jeder Bandpassbereich ist mit einem Pegelregler ausgestattet, um die verschiedenen Leistungswerte der
Lautsprecher auszugleichen. Der HIGH 1-Pegel hat einen Bereich von +/-20 dB, die Leistungsverstärkung
(Standard) befindet sich in der mittleren arretierten Position. Im Mono-MODUS wird HIGH 1 nicht verwendet.
(10) CD Horn EQ Boost
Hiermit wird die Stärke der Anhebung innerhalb des Hochfrequenzbands festgelegt, um die Frequenzdämpfung
und den Effizienzverlust durch bestimmte Kompressionstreiber auszugleichen. Mit der
Schraubendreherschaftregelung ist eine variable Anhebung von 0 dB bis +12 dB bei 20 kHz mit einer Steigung
1. Ordnung und einem ausgezeichneten Phasenfrequenzgang möglich.
(11) High 1 Polarity-Schalter
Ist dieser Schalter gedrückt, wird die Polarität des Signals im HIGH 1-Frequenzband umgekehrt, um die
Fehlersuche zu beschleunigen und um einen korrekten Phasenfrequenzgang des Audiosystems zu
gewährleisten.
(12) Signal Present-LED
Diese grüne LED zeigt das Vorhandensein eines Signals von über -22 dBu im HIGH 1-Band an, selbst wenn das
Band stummgeschaltet ist.
(13) High 1 Mute-Schalter
Ist dieser Schalter gedrückt, wird das Signal im HIGH 1-Band eliminiert, was bei der Installation des
Audiosystems behilflich ist.
(14) Clip/Mute-LED
Diese rote LED zeigt an, wenn der Signalpegel im HIGH 1-Frequenzband den maximal verfügbaren Headroom
von +22 dBu erreicht. Sie leuchtet auf, wenn das Bandsignal etwa +20 dBu erreicht. Im Mute-Modus leuchtet
diese LED kontinuierlich auf.
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(15) Stereo-Zweiwege- oder Mono-Dreiwegemodus-Schalter
Hiermit wird der BETRIEBSMODUS des Geräts eingestellt. Ist dieser Schalter deaktiviert, wird die VSX II als
Zweikanal-Zweiwege-Stereo-Frequenzweiche konfiguriert. Ist dieser Schalter aktiviert, wird die VSX II als
Einkanal-Dreiwege-Mono-Frequenzweiche konfiguriert.
(16) Stereo Mode-LED-Anzeige
Diese gelbe LED blinkt kontinuierlich (1 Hz), wenn sich die VSX II i
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