Electro-Voice DMC 1122B & DML-1122A Owner's Manual

Electro-Yoice
THE DELTAMAX™ SYSTEM
OWNER’S MANUAL
DMC 1122B CONTROLLER
DML-1122A LOUDSPEAKER
THE DELTAMAX™ SYSTEM
TABLE OF CONTENTS
DESCRIPTION AND FEATURES ....................e.0srrecenccacceoezeroreneeon
Table oí Contents
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OPERATION
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AMPLIFIER/CONTROLLER CALIBRATION
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INSTALLATION
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Speaker Installation ..
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WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
THE DELTAMAX™ SYSTEM
DESCRIPTION
GENERAL
The DeltaMax™ DMC-1122B/DML-1122A system
consists of a two-way biamped, high-performance
speaker system and a companion electronic con-
troller. The DML-1122A is a full-range loudspeaker
system intended for high-level sound reinforcement
in touring-sound and permanent-installation appli-
cations. The trapezoidal cabinet shape allows tight
cluster designs, enabling maximum mutual coupling
and single-point-source arrays. The unique cir-
cuitry of the DMC controller provides accurate pro-
tection for the loudspeakers without the use of
shifting high-pass or low-pass filters, shifting cross-
over frequencies or independent band-pass com-
pression. The electronic protection is invoked only
when catastrophic conditions are present for the
loudspeakers. The result is that accurate fre-
quency response is maintained from the lowest
sound pressure levels to the very highest sound
pressure levels available from the loudspeakers.
There are two models in the DML-1122A series:
the DML-1122AP (painted finish) and the
DML-1122APF (painted finish with flying hardware).
The DML-1122A utilizes a 12-inch woofer and a
1.3-inch-exit modified DH1A high-frequency driver.
The system uses flat-front, constant-directivity,
high-frequency horns which are based on the
Electro-Voice HP series (Patent #4,685,532) and
are geometrically optimized for performance from
1,250 Hz to 20,000 Hz.
The DeltaMax™ flying version mode! DML-1122APF
includes three steel-reinforced aircraft-type pan
fittings on the top and bottom of the enclosures to
facilitate the hanging of multi-cabinet arrays. Each
DeltaMax™ flying system is packed with a separate
owners manual which provides specific hanging
instructions.
The electronic circuits are designed to provide
optimum audio performance, even when the audio
drive level is increased for maximum loudness.
Precise speaker modeling circuits control a high-
performance compressor and voitage limiter which
provide speaker excursion protection, voice-coil
temperature protection, and amplifier maximum-
power limiting.
Where very high levels of deep bass are required,
the DMC-2181S/DML-2181A DeltaMax"M sub-
woofer system may be added to the DMC-1122B/
DML-1122A. The DML-2181 A loudspeaker cabi-
net, with two manifolded eighteen-inch speakers,
and the DMC-2181 series electronic controllers
Description
were designed specifically to work in conjunction
with the two-way systems to provide extremely
high-level low-frequency output down to 35 Hz.
Optimum performance of these speakers can only
be assured when used with their dedicated elec-
tronics. Do not use with other electronic cross-
overs and/or processors.
FEATURE SUMMARY
* Fourth-order Linkwitz-Riley crossover filters pro-
vide smooth, accurate response through the
crossover region.
* Special equalization circuits allow flat, wideband
system response.
* Sensing circuits for the drivers control the com-
pressor and voltage limiter to prevent voice-coil
overheating, overexcursion and amplifier clipping
without affecting spectral balance or program
dynamics.
* Dual-time constant compressor circuit with vari-
able compression ratio reduces peak and aver-
age levels for loudspeaker thermal protection
and amplifier clipping prevention as necessary
while preserving relative program dynamics.
* Voltage-clamp loudspeaker excursion protection
does not alter overall program dynamics or fre-
quency response.
* A connection to the control voltage is available
through a jack on the back panel. This allows
precise gain tracking when more than one unit is
used.
* The front panel display shows drive signal level
and compressor gain reduction. Sensing display
for each sense channel shows amplifier limit, ex-
cursion limit, and temperature limit. When its
limit is approached, each LED lights yellow.
* Speaker system is trapezoidal for compact ar-
rays. Flying versions feature integral, steel-rein-
forced fittings to facilitate hanging.
* Both the woofer and the compression driver em-
ploy the best available technology for high power
and accurate sound reproduction.
* A state-of-the-art, flat-front, constant-directivity
horn is utilized for even coverage and flat re-
sponse.
page 1
THE DELTAMAX™ SYSTEM
Specifications
CONTROLLER SPECIFICATIONS
CHANNEL CONFIGURATIONS:
Monoaural two-way; two sense channeis
FILTER TYPE:
4th-order Linkwitz-Riley
CROSSOVER FREQUENCY:
1,250 Hz
GAIN:
5 dB nominal
SIGNAL-PATH EQUALIZATION (see Figure 1),
LF EQ:
—3 dB at 40 Hz, +11 dB at 84 Hz
LF Signal Delay:
0.03 ms at crossover frequency
HF EQ:
4th order optimized for DML-1122A series
driver and horn
TOTAL HARMONIC DISTORTION, 20 - 20,000 Hz:
0.03% typical, 0.1% maximum
NOISE, EACH OUTPUT, 20 - 20,000 Hz NBW,
TYPICAL:
—86 dBu
SIGNAL INPUT,
pe:
Electronically balanced differential
Maximum Level:
+18 dBu
Impedance:
27,000 ohms and .0015uf
CMRR, Typical:
-55 dB
Connector:
Female 3-pin XLR-type
SENSE CHANNEL INPUTS,
Li. again
Floating differential
Maximum Level,
LF: 145V rms
HF: 145V rms
Impedance:
100 kilohms each side to ground
Connector:
Two five-way binding posts
OUTPUTS (LF and HF):
Type: po :
Transformer floating differential
Maximum Level:
+18 dBu
Minimum Load Impedance for Full Level:
600 ohms
Connectors:
Male 3-pin XLR-type
POWER REQUIREMENTS:
100, 120, 220, 240 V ac, 50 - 60 Hz, 13 W
CHASSIS CONSTRUCTION:
Painted steel
COLORS:
Gray front panel/black chassis with white graphics
MOUNTING:
EIA 19-inch rack mount, 1.75 in. high, 8.97 in.
behind panel (including connectors); supplied
with front-panel security cover for controls.
PE SEE TS ESS EEE ESS SEE ee ST
SYSTEM SPECIFICATIONS
Frequency Response, Measured in Farfield,
Calculated to One Meter on Axis, Swept One-Third-
Octave Pink Noise, One Watt into LF Midband
(2.83 V at 250 Hz), Anechoic environment, +3 dB
(see Figure 2):
67-20,000 Hz
Sound Pressure Level at One Meter, One Watt
Input Power, Anechoic Environment, Band-Limited
Pink-Noise Signal,
High Frequency:
110 dB
Low Frequency:
98 dB
Typical System Maximum Continuous Sound
Pressure Levels at One Meter, Anecholc
Environment:
123 dB
Typical System Maximum Peak Sound Pressure
Levels at One Meter, Anechoic Environment:
129 dB
Crossover Frequency:
1,250 Hz
Beamwidth Angle Included by 6-d5-Down Points
on Polar Responses, Indicated One-Third-Octave
Bands of Pink Noise (see Figure 4),
1.0-20 kHz Horizontal:
80° (+25°, -20”)
3.8-20 kHz Vertical:
55° (+25°, —5°)
Directivity Factor R, (Q) 1.0-20 kHz Median
(see Figure 5):
10.6 (+9.3, 4.0)
Directivity Index D, 1.0-20 kHz Median
(see Figure 5):
9.8 dB (+3.2 dB, —1.6 dB)
Distortion, 115 dB SPL at One Meter,
Shaped Spectrum (see Figure 6),
.Second Harmonic
100 Hz:
4.5%
800 Hz:
0.8%
2,000 Hz:
0.7%
5,000 Hz:
1.6%
Third Harmonic
100 Hz:
0.9%
800 Hz:
1.8%
2,000 Hz:
0.9%
5,000 Hz:
1.6%
page 2
THE DELTAMAX™ SYSTEM
Specifications
SPEAKER SPECIFICATIONS
Transducer Complement,
High Frequency:
DH1A variant compression driver (1.3-inch exit)
Low Frequency:
DL12X variant 12-inch woofer
Efficiency,
High Frequency:
25%
Low Frequency:
4.5%
Long-Term Average Power Handling Capacity,
High Frequency (per AES2-1984):
75 watts
Low Frequency (per EIA RS-426A):
300 watts
Short-Term Power Handling Capacity,
High Frequency:
300 watts
Low Frequency:
1,200 watts
Maximum Long-Term Midband Acoustic Output,
High Frequency:
18.8 watts
Low Frequency:
13.5 watts
Nominal Impedance,
High Frequency:
8 ohms
Low Frequency:
8 ohms
Minimum Impedance,
High Frequency:
6.0 ohms
Low Freguency:
8.4 ohms
Dimensions,
Helght:
58.4 cm (23.0 in.)
Width:
37.1 em (14.63 in.)
Depth: 7
35.6 cm (14.0 in.)
Net Weight:
30.7 kg (68 Ib)
Shipping Weight:
33.9 kg (75 Ib)
Enclosure Materials,
Structural:
*/a-inch 14-ply birch plywood
Finish:
Black textured paint
Grille:
Steel with charcoal-gray foam
Hanging (DML-1122APF only):
3-point flying system (accepts Aeroquip 32326 and
32343 fittings)
RESPONSE IN dB
Em 76 50 169 a 500 IU 265
suc 10690 10060
FREQUENCY IM HERTZ
FIGURE 1 - DMC-1122B Frequency Response
SPL in dB
FREQUENCY IN HERTZ
FIGURE 2 - DMC-1122B/DML-1122A
Axial Frequency Response
(1 watt/1 meter Into LF midband)
page 3
Figures
THE DELTAMAX™ SYSTEM
VERTICAL ————
5 dB per division
HORIZONTAL
FIGURE 3 - DMC-1122B/DML-1122A Polar Response
('/-octave pink noise, 4 volts at 20 feet)
page 4
THE DELTAMAX™ SYSTEM Figures
5 dB per division
FIGURE 3 (continued) - DMC-1122B/DML-1122A Polar Response
('/s-octave pink noise, 4 volts at 20 feet) ETE TAL
VERTICAL ————
page 5
THE DELTAMAX™ SYSTEM
Figures
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100 200 500 1000 2000 5000 10000 20000
FREQUENCY (Hz)
FIGURE 4 - DMC-1122B/DML-1122A
Beamwidth vs. Frequency Whole Space
(anechoic)
NUMBERS INDICA
y SPECIFIC Ra V
DIRECTIVITY FACTOR Rg (Q)
FIGURE 5 - DMC-1122B/DML-1122A
Directivity Factor and Directivity Index
vs. Frequency Whole Space (anechoic)
DIRECTIVITY INDEX Dj (dB)
LEVEL IN dB
(Shaped to reflec! typical
frequency
Jrd HARMONIC
2nd HARMONIC
+ = че 750 pan! 15:00 7005 OH HEHE тек
FAEDUERC Y IN HERTS
FIGURE 6 - DMC-1122B/DML-1122A
Harmonic Distortion
(115 dB SPL/1 meter using typical
music frequency spectrum)
page 6
Block Diagram
THE DELTAMAX™ SYSTEM
FUNCTIONAL BLOCK DIAGRAM
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page 7
THE DELTAMAX™ SYSTEM Operation
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PICTORIAL 1 — DMC-1122B Front Panel Diagram
OPERATION
FRONT PANEL INDICATORS AND CONTROLS
(refer to pictorial 1)
1. INPUT LEVEL INDICATORS: Three LEDs
show the drive level at the input of the control-
ler. Levels are calibrated in dBu (-20, 0, + 16)
NOTE: Do not allow the 16-dB input-level
indicator to stay on continuously. Ifthe 16-dB
indicator is allowed to stay on for long periods,
the input circuit will clip. The input signal
should be reduced until the 16-dB indicator
lights only on loud instantaneous peaks.
2. GAIN REDUCTION INDICATORS: Three
LEDs show how much gain reduction is occur-
ring in the compressor at the input of the con-
troller. The display is calibrated in relative dB
(3, 6, 12). Gain reduction occurs only when the
maximum temperature, excursion and amplifier
capabilities are exceeded for either the woofer
or compression driver. The Output-Limits dis-
play indicates which limits are being exceeded
when gain reduction occurs.
NOTE: Do not allow the 12-dB-gain reduction 4.
indicator to stay on continuously. If the 12-dB
indicator is allowed to stay on for long periods,
the speaker may be damaged. The input
signal should be reduced until the 12-dB
indicator lights only on loud passages.
3. OUTPUT LIMIT INDICATORS:
A. TEMPERATURE LIMIT: These LED's
light when the temperatures of the woofer
or compression-driver voice coils
approach their maximum allowable limit.
Under this condition, gain reduction will
occur at the input of the controller so that
the maximum-temperature limits will not
be exceeded for either the woofer or
compression driver.
B. EXCURSION LIMIT: These LED’s light
when the excursion of the woofer cone or
compression-driver diaphragm approach
their maximum allowable limit. Under this
condition, voltage clamping will occur at
the output of either the low- or high-
frequency section so that the maximum-
excursion limits will not be exceeded for
either the woofer or compression driver.
C. AMPLIFIER LIMIT: These LED's will
provide status information for the high-
and low-frequency power amplifiers if the
controller has been calibrated to the
amplifiers. (See the AMPLIFIER/
CONTROLLER CALIBRATION section.)
With the Cal/Clip-Limit switch pressed in,
the LED's will signal the occurence of
amplifier clipping. With the switch in the
outward position, the LED's indicate that
gain reduction in the form of hard limiting
is occurring at the input of the controller to
prevent the amplifiers from clipping.
OUTPUT LEVEL CONTROLS:
A. LF: This control adjusts the level of the
low-frequency output signal. The control
range is from - 12 dB to + 12 dB.
NOTE: The gain has been structured within
the DMC-1122B controllers so that
DML-1122A loudspeaker will have a flat
frequency response (as shown in Figure 2) in
an anechoic environment with the output
levels of the controllers set in the 0-dB-detent
position and with the amplifier channels having
identical gain driving the LF and HF sections
of the speaker.
page 8
THE DELTAMAX™ SYSTEM
OPERATION (continued)
5. AMPLIFIER CALIBRATION CONTROLS:
These controls are used for calibrating the con-
troller to both the low- and high-frequency am-
plifiers so that the controller can monitor the
clipping of the amplifier outputs and, if desired,
act as a limiter to prevent amplifier clipping.
See AMPLIFIER/CONTROLLER CALIBRA-
TION section.
NOTE: The calibrated markings on the front
panel correspond to the power level that an
amplifier would deliver to an 8-ohm load. A
crude, approximate calibration can be ob-
tained by rotating the control until the slot of
the trimpot points at a power level equivalent
to the amplifier power rating for an 8-ohm
load. (When the trimpot is in its mid position it
is pointing at 400 watts.)
6. CAL-CLIP LIMIT SWITCH: This switch selects
the mode that controller will monitor the amplifi-
ers (assuming that the controller has been cali-
brated to the amplifiers - see AMPLIFIER/
CONTROLLER CALIBRATION section). With
the switch pushed in, the Amplifier Limit LED's
will indicate when the amplifiers are clipping.
With the switch in the outward position, the Am-
plifier Limit LED's will indicate that gain reduc-
tion is occurring to prevent the amplifiers from
clipping.
NOTE: If the controller has not been cali-
brated to both the low- and high-frequency
amplifiers, the Cal/Clip Limit switch should be
pushed in. This will defeat the compressor/
limiter from trying to prevent amplifier clipping.
(The Amplifier Limit LED's will still flash when
the amplifier exceeds the power levels that the
Amplifier Calibration trimpots are set to.) Poor
sound quality can result with incorrect calibra-
tion and the compressor/limiter engaged.
Operation
7. POWER INDICATOR: This LED lights when
the controller is on.
8. POWER SWITCH: This switch turns the con-
troller on and off.
BACK PANEL CONNECTIONS
(refer to pictorial 2)
1. AC POWER CORD RECEPTACLE: This re-
ceptacle is for the ac power cord (supplied with
the unit).
FUSE RECEPTACLE: This fuse receptacle
requires either a 0.25 A 250 V slow blow fuse
(for 100/120 V ac operation), ora 0.1 A250 V
slow blow fuse (for 220/240 V ac operation).
3. SENSE INPUTS:
A. LF: This input is for the connection of the
sense line to monitor the power delivered
to the woofer and should be connected to
the output of the low-frequency amplifier.
№
B. HF: This input is for the connection of the
sense line to monitor the power delivered
to the compression driver and should be
connected to the output of the high-
frequency amplifier.
NOTE: The Sense Inputs are floating differen-
tial with 5-way binding posts, see CONNEC-
TOR and CABLE REQUIREMENTS section
for detailed wiring information.
4. OUTPUTS:
A. LF: This input is the low-frequency output
of the DMC crossover/controller and
should be connected to the input of the
low-frequency amplifier.
с
HF: This connection is the high-frequency
output of the DMC crossover/controller
and should be connected to the input of
the high-frequency amplifier.
2 3 4 5 6
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PICTORIAL 2 — DMC-1122B Back Panel Diagram
THE DELTAMAX™ SYSTEM
OPERATION (continued)
5. GAIN CONTROL BUS: This 1/a-inch jack is for
slaving the gain-control busses of other DMC
controllers to enable gain tracking in a multiple-
controller system. See CONNECTOR and
CABLE REQUIREMENTS section for detailed
wiring information.
6. INPUT: This connection is for the full-range
signal input to the DMC controller. This input is
electronically balanced with a female 3-pin
XLR-type connector with pin 1 as a ground ref-
erence, pin 2 high (+) and pin 3 low (-). See
CONNECTOR and CABLE REQUIREMENTS
section for detailed wiring information.
TYPICAL SYSTEM OPERATION
The DML-1122A is a full-range, biamped loud-
speaker system to be used with the DMC-1122B
electronic controller. Besides conventional fre-
quency division, the DMC electronic controllers
have equalization and time delay to obtain optimum
performance from their respective DeltaMax™ DML
loudspeaker systems. In addition, sense lines to
the controllers monitor the voltage drive to each
loudspeaker in the system and automatically acti-
vate protection circuitry to prevent cone/diaphragm
overexcursion, voice-coil overheating and amplifier
clipping. Before operating a DeltaMax™ system,
the user should read this manual thoroughly and
make sure that the system has been set up as de-
tailed in the INSTALLATION section and the ampli-
fiers and controller have been calibrated as detailed
in the AMPLIFIER/CONTROLLER CALIBRATION
section.
The gain and equalization structures in the DMC
controllers have been set up so that the DML loud-
speaker systems will have a flat frequency re-
sponse (in an anechoic environment) when the
Output Level trimpots on the controllers are set in
the 0-dB detent position and the amplifiers all have
the same gain (i.e., the amplifiers are calibrated for
32 dB of gain as detailed in the AMPLIFIER/CON-
TROLLER CALIBRATION section). This gives the
user a standard reference every time the system is
set up. Adjustments to the drive levels of the low-
and high-frequency sections are then only needed
to compensate for room acoustics or array configu-
ration. When adjustments are required, they
should be made with the Output Level trimpots on
the controllers. The level controls on the amplifiers
should be left in their calibrated positions. (See the
MULTIPLE LOUDSPEAKER ARRAY section for
circumstances when it is permissible to adjust the
amplifier level controls.)
The input circuit of the DMC controllers clips with a
+ 18 dBu (6.2 volts rms) input signal. The input-
signal level display has three LED's calibrated to —
20, 0 and + 16 dBu. To avoid clipping, the input
Operation
should be driven only to the point that the + 16 dB
LED lights on instantaneous peaks. If more gain is
desired from the controller, the Output Level
trimpots may be turned up. Note that there are cali-
brated markings on the front panel of the controller
(3 dB per division) to enable accurate gain adjust-
ments.
Extensive modeling circuits allow the controller to
monitor the status of the voice-coil temperature and
the cone/diaphragm excursion of the loudspeakers
in each frequency band. If a loudspeaker in one of
the frequency bands approaches its maximum ther-
mal limit, a multi-time-constant compressor circuit
with a variable compression ratio will reduce the
peak and average levels of the full-range input sig-
nal as necessary to protect the driver, while pre-
serving the spectral balance and the relative
program dynamics. When gain reduction occurs,
an Output Limit Temperature LED will light indicat-
ing which frequency-band loudspeaker is reaching
its thermal limit. If a loudspeaker in one of the fre-
quency bands approaches it maximum excursion
limit, a dynamic frequency-sensitive voltage-clamp-
ing circuit at the output of that frequency band will
clamp the peak of the output waveform at a level
above which excursion damage would occur to the
loudspeaker; hence, preserving the overall spectral
balance. When voltage clamping occurs, an Output
Limit Excursion LED will light indicating which fre-
quency-band loudspeaker is reaching its excursion
limit.
The DMC Controller will also prevent long-term am-
plifier clipping. The controller must be calibrated as
detailed in the AMPLIFIER/CONTROLLER CALI-
BRATION section and the Cal/Clip Limit switch
must be in the Out position for this function to work
properly. If an amplifier in one of the frequency
bands approaches clipping, a multi-time-constant
compressor-limiter circuit will reduce the peak and
average levels of the full-range input signal as nec-
essary to prevent long-term clipping while preserv-
ing the overall spectral balance. When gain
“reduction occurs, an Output Limit Amplifier LED will
light indicating which frequency-band amplifier is
reaching its power limit. With the Cal/Clip Limit
switch pushed in, gain reduction will not oceur to
prevent amplifier clipping and the Output Limit Am-
plifier LED's will simply indicate when the amplifiers
are going into clipping.
The DeltaMax™ DMC controllers provide protection
for the loudspeakers without affecting the overall
spectral balance or dynamic range. The controllers
have an LED display to inform the user when the
protection circuitry is activated and what is causing
the protection to take place. Each frequency band
has three LED's to indicate loudspeaker thermal-
protection activation, loudspeaker excursion protec-
tion activation and amplifier clipping (or amplifier
clipping prevention). In addition, there is an LED
page 10
THE DELTAMAX™ SYSTEM
OPERATION (continued)
display to indicate the amount of long-term overall
gain reduction occurring due to loudspeaker ther-
mal protection and amplifier clipping prevention.
(The instantaneous loudspeaker excursion voltage-
clamping protection is not reflected in the overall
gain-reduction display.)
In very high-powered applications, the detailed dis-
plays on the DMC controllers provide the user with
information to make adjustments or changes to the
system (if desired) to eliminate the protection and
increase the acoustic output. For example:
* |f an excessive amount of low-frequency protec-
tion is occurring, selective equalization can be
used (/s-octave-band equalizer, parametric
equalizer, etc.) to reduce the level in the fre-
quency range that is causing the excessive ex-
cursion, allowing the overall level to be turned
up. If the desired amount of high-level low-fre-
quency response still cannot be obtained,
subwoofers (or additional subwoofers) should be
added to the system.
* |f an excessive amount of loudspeaker thermal
protection is occurring in any frequency band,
more speaker systems are generally needed. If
the program material has a lot of energy concen-
trated in a relatively small frequency range, se-
lective equalization may serve as an effective
compromise.
* If excessive amplifier clipping (or amplifier clip-
ping prevention) is occurring without excessive
Operation
loudspeaker thermal protection or excursion pro-
tection, larger power amplifiers should be used.
* |f excessive loudspeaker thermal protection and
excursion protection is occurring, more speakers
should be used.
* If excessive overall gain reduction is occurring,
more speakers should be added.
* |f the 12-dB-gain-reduction LED is on for any sig-
nificant portion of time, the level should be
turned down. Levels driven beyond this point
may exceed the protection capability of the pro-
tection circuitry.
When multiple controllers are used (such asin a
stereo system) the control voltages should be
slaved together as detailed in the INSTALLATION
section. The gain of all of the controllers will then
track whenever gain reduction occurs due to loud-
speaker thermal protection or amplifier clipping pre-
vention, regardless of which loudspeaker or
amplifier was exceeding its limit. This will prevent
acoustic image shifting at very high levels. When a
DMC-2181S/DML-2181A subwoofer system is
used with a full-range DeltaMax™ system (such as
a DMC-1122B/DML-1122A) the control voltages
should be slaved together to prevent spectral bal-
ance shifting at high levels when gain reduction oc-
curs for loudspeaker thermal protection or amplifier
clipping prevention. The loudspeaker excursion
voltage-clamping protection wili still operate inde-
pendently in each frequency band in each controller
when the control voltages are slaved.
page 11
THE DELTAMAX™ SYSTEM
AMPLIFIER/CONTROLLER CALIBRATION
AMPLIFIER CALIBRATION PROCEDURE
Maximum performance of the DeltaMax™ controller
protection circuitry occurs, under the most severely
over-driven conditions, when the voltage gain of the
amplifiers fall in the range of 27 to 35 dB (with 32
dB being optimum). This gain range is typical of
most high-power amplifiers and can easily be ad-
justed by simply adjusting the level controls on the
amplifier. 3
The procedure for calibrating an amplifier to have
32 dB of gain is as follows:
1. With the amplifier turned on and without speak-
ers hooked on the amplifier output, apply 0.5-
volt rms 1,000-Hz sinewave signal to the input
of the amplifier.
2. Adjust the amplifier level control until the output
of the amplifier measures 20 volts rms.
NOTE: If the amplifier will be operated in the
mono-bridged mode, it should be calibrated
when wired in the mono-bridged configuration.
CONTROLLER CALIBRATION PROCEDURE
This procedure is for calibration of the DMC
controller's internal amplifier limit circuits to the
actual clip level of the power amplifiers. Calibration
is set by the LF and HF Amplifier Calibration
trimpots on the front panel.
Before plugging in the ac power cord, be sure the
controller is wired for the correct primary (mains)
voltage.
Disconnect the speakers and remove the security
cover from the controller by removing the two
screws on the front panel of the controller. Perform
the following procedure:
1. Connect the controller to the low- and high-fre-
quency power amplifier channels as detailed in
the INSTALLATION section.
2. Be sure the controller LF and HF Sense Inputs
are connected to the correct amplifier outputs
and the speakers are disconnected from the
amplifier.
3. Set the low- and high-frequency amplifier gain
controls for 32 dB voltage gain, or as close as
possible to 32 dB (this is optimum, but it can be
in the range of 27 to 35 dB). See the AMPLI-
FIER CALIBRATION PROCEDURE section.
4. Tum the LF and HF Amplifier Calibration
trimpots on the controller to full counterclock-
wise. Press the Cal/Clip Limit switch to its re-
cessed Cal/Clip position with a screwdriver or
other suitable tool.
5. In order to prevent thermal limiting from occur-
ring while calibrating the amplifier limit levels,
insert a shorted 1/«-inch phone plug (tip-sieeve)
6.
7.
10.
Th
Amplifier/Controller Calibration
into the Gain control bus jack on the back of
the controller. The Thermal Limit LED may still
come on but no gain reduction should be indi-
cated.
Send a 500-Hz sinewave test signal to the con-
troller input.
Adjust the signal source level until the low-fre-
quency amplifier begins to clip (you may turn
up the LF Output Level on the controller if nec-
essary to get the amplifier to clip). Clipping is
noted by the clip indicator on the power ampli-
fier or by monitoring the output with an oscillo-
scope. Now, turn the level down until the clip
light just goes out (or until the clipping disap-
pears on the oscilloscope).
Turn the LF Amplifier Calibration trimpot on the
controller clockwise with a screwdriver until the
LF Amplifier Output Limit LED comes on. Note
that the slot of the trimpot is pointed at the ap-
proximate power rating of the amplifier for an 8-
ohm load as denoted by the calibrated
markings on the front panel of the controller.
Note also that this is the maximum amount of
power capable of being delivered to a single
driver in this amplifier configuration.
The LF section of the controller is now cali-
brated. The LF Output Level trimpot may
be adjusted as necessary for the desired
frequency spectrum balance without
affecting calibration.
Change the input test signal to a frequency of
5,000 Hz.
Adjust the signal source level until the high-fre-
quency amplifier begins to clip (you may turn
up the HF Output Level on the controller if nec-
essary to get the amplifier to clip). Now, tum
the level down until the clip light just goes out
(or until the clipping disappears on the oscillo-
scope).
Turn the HF Amplifier Calibration trimpot on the
controller clockwise with a screwdriver until the
HF Amplifier Output Limit LED comes on. Note
that the slot of the trimpot is pointed at the ap-
proximate power rating of the amplifier for an 8-
ohm load as denoted by the calibrated
markings on the front pane! of the controller.
Note also that this is the maximum amount of
power capable of being delivered to a single
driver in this amplifier configuration. If the
power rating of the high-frequency power am-
plifier is much greater than 250 watts (and,
hence, the HF Amplifier Calibration trimpot on
the controller is set much greater than 250
watts), then an additional margin of safety for
the high-frequency driver can be obtained by
setting the HF Amplifier Calibration trimpot to
250 watts.
page 12
THE DELTAMAX™ SYSTEM
AMPLIFIER CALIBRATION PROCEDURE
(continued)
The HF section of the controller is now cali-
brated. The HF Output Level trimpot may be
adjusted as necessary for the desired fre-
quency spectrum balance without affecting cali-
bration.
12. Remove the shorted ‘/s-inch phone plug
from the Gain Control Bus jack and set the
Cal/Clip Limit switch to the Limit position (out).
Set the HF and LF Output Level controls to
their center-detent position (or as desired).
13. Turn the amplifier off and connect the speaker
cables to the output of the amplifier. Make cer-
tain that the “lows” are wired to the woofer and
that the “highs” are wired to the compression
driver. In addition, be sure to observe polarity
when making speaker connections.
NOTES:
A. The Amplifier Calibration trimpots may be
adjusted during use with program material
to set the desired amount of amplifier
limiting. The limiter in the controller will
allow some fast transient peaks through,
allowing some amplifier clipping to occur
on signal peaks after the calibration
procedure. The limiter circuit will,
however, prevent long-term amplifier
clipping when adjusted properly.
B. The Cal/Clip Limit switch may be left in the
recessed Cal/Clip position (in) if the power
amplifier has an internal limiter, or if clip
protection is not desired., When left in the
Cal/Clip position, the Amplifier Output
Limiter indicators on the front panel of the
controller will indicate when the amplifier
is self-limiting or clipping.
С. If two or more speakers are connected in
parallel to an amplifier output, most
amplifiers will exhibit a drop in clipping
voltage due to the lower load impedance.
This will require that the Amplifier
Calibration trimpot be set to a value
slightly lower than the value obtained in
the “no-load” calibration test.
Note that the result of this is that, even
when multiple speakers are paralleled on
an amplifier channel, the Amplifier
Calibration trimpot will always end up
pointing at the maximum amount of power
(on the calibrated markings on the front
panel) that the amplifier is capable of
delivering to each individual driver no
matter how many drivers are connected in
parallel.
Amplifier/Controller Calibratior/Installation
D. Do not change the amplifier gain, or
recalibration will be necessary. Use the
LF and HF Output Level controls on the
controller to change power amplifier drive
levels. The Output Level controls do not
affect controller calibration.
INSTALLATION
AMPLIFIER REQUIREMENTS
Professional power amplifiers with the following
ratings are recommended for use with the
DMC-1122B/DML-1122A system:
LF: 300-600 watts continuous into eight ohms
HF: 125-250 watts continuous into eight ohms
The use of amplifiers with lower power ratings is
acceptable, however, the full-power capabilities of
the DML speakers will not be realized. The use of
amplifiers with significantly higher power ratings is
wasteful and may endanger the loudspeakers; it is
generally not recommended.
Under certain circumstances, however, higher rated
power amplifiers are acceptable. It is acceptable to
drive the DML-1122A speaker with a stereo power
amplifier having the recommended LF power rating
utilizing one channel to drive the low frequencies
and the other channel to drive the high frequencies.
For an extra degree of protection when operating in
this configuration, the user may want to set the HF
Amplifier Calibration level to the 250-watt position
to limit excessively high power levels from reaching
the compression driver.
DML-1122A speakers may be paralleled with other
DML-1122A speakers if the amplifier is capable of
delivering adequate power to each speaker at the
lower impedance. Under no circumstances should
DML-1122A and DML-1152A speakers be paral-
leled on the same amplifier channels.
NOTE: For proper operation of the protection
circuitry, the power amplifiers must be calibrated
to have a voltage gain between 27 and 35 dB (32
dB is optimum). See the AMPLIFIER/CONTROL-
LER CALIBRATION section.
CONNECTOR AND CABLE REQUIREMENTS
Controller Connections
The DeltaMax™ controllers have 3-pin XLR-type
connectors for signal input and output. The input is
electronically balanced and has a female connector
with pin 1 as a referenced ground, pin 2 high (+)
and pin 3 low (=). The outputs are transformer bal-
anced and have male connectors with pin assign-
ments identical to the input. Figure 13 illustrates
the preferred interconnection between the controller
and the power amplifier. When driving unbalanced
lines, pin 3 should be shorted to ground.
page 13
THE DELTAMAX™ SYSTEM
INSTALLATION (continued)
To hook up the DeltaMax™ controller to the power
amplifiers, connect the LF Output of the controller
to the input of the low-frequency amplifier and the
HF Output of the controller to the input of the high-
frequency amplifier. The outputs of the low- and
high-frequency amplifiers are then connected to the
LF input (woofer) and HF input (compression driver)
respectively, of the DML-1122A speaker system.
See the LOUDSPEAKER CONNECTIONS section
for details of the loudspeaker wiring. See Figures 8
and 9 for two typical system configurations.
Sense lines must be connected to the DeltaMax™
controller so that the power levels being delivered
to the woofer and compression driver can be moni-
tored. This is accomplished by connecting the out-
put of the low-frequency amplifier to the LF Sense
input on the controller and the output of the high-
frequency amplifier to the HF Sense Input on the
controlier. The sense input connectors are 5-way
binding posts wired in a floating differential configu-
ration. This configuration makes it possible to con-
nect sense lines to a bridged amplifier without
shorting out one of the legs of the amplifier. High-
quality banana plugs may be used for these con-
nections, but wires underneath the binding posts
provide greater security. Small gauge wire (e.g. 22
gauge) is acceptable for these connections be-
cause there is minute current flow, but be sure the
connections are secure and safe enough for the
high voltages from the amplifier output.
The gain control bus in the DMC controllers is ac-
cessible through a two-conductor 1/«-inch jack on
the back of the controller. This feature is used
when itis desired for the gain of two or more units
to track. Using a standard '/s-inch patch cable,
connect the jacks together. For more than two
units, use Y-connectors. For example:
1. When multiple controllers and loudspeakers
are used (such as in a stereo system), the
controller's Gain Control jacks should be con-
nected together to maintain level balancing and
imaging.
2. When the DMC-1122B/DML-1122A full-range
system is used with the DMC-2181S/
DML-2181A subwoofer system, the controller's
Gain Control jacks should be connected to-
gether between the two controllers to ensure
flat-frequency response when the controllers
are operating in the protection mode.
Loudspeaker Connections
The DML-1122A speaker system is equipped with
4-pin Neutrik Speakon™ NL4MPR connectors for
electrical connection to the woofer and compres-
sion drivers. Each cabinet has two identical con-
nectors with parallel wiring for connecting additional
DML speaker systems. One mating Neutrik
Installation
Speakon™ NL4FC cable-end connector is supplied
with each system.
Cables, connectors and wiring accessories are
available for the DML speaker systems from Pro
Co. Sound, Inc. and Whirlwind Music Distributors,
Inc. To find your local Pro Co., Whirlwind or
Neutrik dealer, contact:
Pro Co Sound, Inc.
135 E. Kalamazoo Ave.
Kalamazoo, Ml 49007
Whirlwind Music Distributors, Inc.
P.O. Box 1075
Rochester, NY 14603
Neutrik USA, Inc.
195-S3 Lehigh Ave.
Lakewood, NJ 08701
The pin connections are as follows:
Pin 1 —= LF (-)
Pin 1 + = LF (4)
Pin 2 - = НЕ (-)
Pin 2 + = HF (+)
Both the low-frequency and high-frequency inputs
present a nominal eight-ohm load to the amplifier;
however, the compression driver has a low-
frequency protection capacitor in series.
Multiple Loudspeaker Arrays
Arrays consisting of multiples of identical
DeltaMax™ loudspeaker systems can be imple-
mented in a variety of ways. There does not need
to be one controller for every speaker cabinet.
Generally, there only needs to be as many control-
lers as there are different program sources. For
example; a monaural program source requires one
DMC-1122B controller; a stereo program source
requires two DMC-1122B controllers; etc. In addi-
tion, a DMC-2181S/DML-2181A subwoofer system
may be added to a DMC-1122B/DML-1122A system.
The DMC-2181S is a stereo controller with left and
right high outputs (above 100 Hz) and a mono-
summed sub output (below 100 Hz). A monaural
program source requires one DMC-2181S control-
ler and one DMC-1122B controller; a stereo pro-
gram source requires one DMC-2181S controller
and two DMC-1122B controllers.
For the sake of simplicity, the following discussion
will be confined to the various possible connection
schemes for arrays of identical loudspeakers with
only one program source and without subwoofers.
(A stereo array can be broken down and analyzed
as two separate arrays, each having a separate
program source. Subwoofer wiring is addressed in
the DMC-2181S manual.) Amplifier inputs, outputs
and sense lines will be addressed in the discussion.
The outputs (SUB OUT, LF OUT, HF OUT, etc.) of
the DMC controllers are connected to the inputs of
multiple amplifier channels through the use of Y-
page 14
THE DELTAMAX™ SYSTEM
INSTALLATION (continued)
cords (or multiple Y-cords). The number of ampli-
fier channels that can be driven by a single output
of a controller is limited only by the total combined
input impedance of the paralleled amplifiers. The
DeltaMax™ controller outputs can drive a combined
impedance of 600 ohms or greater, (For example,
sixteen amplifiers, each having an input impedance
of 10 k ohms, can be paralleled off of one DMC out-
put.) Ifit is necessary to parallel additional amplifi-
ers, line-level distribution amplifiers will have to be
employed to drive the amplifier inputs. (Alterna-
tively, multiple DMC controllers with paralleled in-
puts could be used to distribute the amplifier load.)
For the case where all of the DeltaMax™ loud-
speakers are paralleled on the output of a single
amplifier channel and only one controller is used,
the sense line to that controller is connected to the
output of the amplifier. In this case, all of the loud
speakers are driven at the same level and the con-
troller monitors the voltage drive to each speaker.
Make sure that the amplifier is calibrated for 32 dB
of gain and that the controller is calibrated to the
amplifier (see AMPLIFIER/CONTROLLER CALI-
BRATION section).
For the case where the Delta Max™ loudspeakers
are powered by multiple amplifiers, all driven at the
same level and only one controller is used, the
sense line to that controller is connected to any one
of the amplifier outputs. Note that this requires the
use of identical amplifiers, each calibrated for 32 dB
of gain and that the controller is calibrated to the
amplifiers (see AMPLIFIER/CONTROLLER CALI-
BRATION section). Although the controller is only
actually sensing one amplifier and one set of loud-
speakers, they all are being protected equally as
long as all of the amplifiers are performing identi-
cally.
For the case where the DeltaMax™ loudspeakers
are powered by multiple amplifiers, each driven at
different levels and only one controller is used, the
sense line to that controller is connected to the out-
put of the amplifier that is delivering the highest
power levels to the loudspeakers. This is a fairly
common occurrence; where the levels of individual
loudspeakers in an array are adjusted to provide
even room coverage. In this case, the amplifier be-
ing sensed must be calibrated for 32 dB of gain and
the controller is calibrated to that amplifier. (See
AMPLIFIER/CONTROLLER CALIBRATION sec-
tion.) The other amplifiers must be identical to the
one being sensed, with the exception that their lev-
els are turned down as necessary to obtain even
room coverage. Although the controller is actually
sensing only one amplifier and one set of loud-
speakers, they are all being protected because the
one being driven the hardest is triggering the pro-
tection.
Installation
Note in the last two examples where multiple ampli-
fiers are used to power multiple loudspeakers in an
array, the level setting and calibration of the amplifi-
ers are critical to ensure that all of the loudspeakers
are protected with only one sense line. If, in the nor-
mal course of operation the level settings of the
amplifiers are likely to be tampered with, the sys-
tem should be set up with one controller per ampli-
fier, allowing each set of speakers to be monitored.
In this case, each amplifier would be calibrated for
32 dB of gain and any level adjustment of loud-
speakers would be done with the Output Level
trimpots on the controllers.
It should be noted that, when multiple DML-1122A
loudspeaker systems are closely assembled in an
array, a build up of low and lower-mid frequencies
can occur. The cause of this phenomenon is two-
fold. Mutual acoustic coupling between woofers at
the lowest frequencies (typically below 100 Hz) re-
sults in increased efficiency and, hence, increased
sound pressure level. (A similar effect occurs when
a loudspeaker is placed near a boundary—a wall, a
ceiling, a floor, etc.) In the upper-bass/lower-mid-
range region (typically below 500 Hz), an array of
multiple woofers will have greater directivity (a
higher Q) than that of a single woofer, resulting in
higher on-axis sound pressure levels. Because the
equalization of the DMC-1122B controller is tailored
to provide a flat acoustic frequency response with a
single DML-1122A loudspeaker, an over emphasis
of the low and lower-mid frequencies can result
when multiple loudspeakers are assembled to-
gether. The exact nature of this phenomenon will
depend on the details of the array (the number of
loudspeakers, their spacing, the splay angles, prox-
imity to boundaries, etc.) An increase in acoustic
response at these frequencies can result in low-
frequency feedback or unwanted rumble, and is
Dee: dealt with using a graphic or parametric equal-
zer.
SPEAKER INSTALLATION
The DML-1122APF is a flying version of the
DML-1122AP, Each cabinet has a total of six steel-
reinforced aircraft-type pan fittings (three on the top
and three on the bottom). This three-point flying
system makes maximum use of the trapezoidal
cabinets, permitting a wide range of angle adjust-
ment and offering maximum flexibility in array de-
sign and implementation for both the touring sound
company and the sound contractor. The pan fittings
mate with the Aeroquip 32343 and 32326 twelve-
jaw fittings. Electro-Voice offers the DMS series of
rigging hardware; a complete line of flying accesso-
ries to be used with the DML speaker systems.
page 15
THE DELTAMAX™ SYSTEM
INSTALLATION (continued)
*** CAUTION ***
The DML-1122APF speaker system should be
suspended overhead only in accordance with
the procedures and limitations specified in the
DML-1122AF Flying Manual which is packed
with each flying speaker system.
Each DML-1122A speaker system comes with four
rubber feet and.mounting screws as accessories for
the user to install as an option if desired. Rubber
feet on the enclosure lessens the possibility of slip-
ping and sliding in applications where the speaker
systems are stacked.
CONTROLLER INSTALLATION
Power Source
The DMC-1122B comes prewired from the factory
for operation at 120 volts. To operate at 240 volts,
the primary wiring of the power transformer must be
altered.
*** CAUTION ***
Hazardous voltages and currents may be en-
countered within the chassis. The service infor-
mation contained within this document is for
use by Electro-Voice authorized warranty sta-
tions and qualified service personnel only.
To change the transformer primary wiring configu-
ration use the following procedure:
1. Unplug the controller's power cord from the ac
power source.
2. Remove the seven screws securing the top
cover. There are two screws on each side, two
screws on the rear and one screw in the front
panel (center, top).
Installation
3. Locate the eight voltage select solder cups
near the power transformer. Referring to Table
1, reconnect the leads corresponding to the de-
sired primary voltage.
4. Install the correct line fuse. See values in
Table Il.
5. Plug the power cord into an ac outlet and tum
the controller on. Measure the voltage at the
points shown in the PCB diagram. The mea-
sured voltage should be +22 volts. If the mea-
sured voltage is not within 10% of this value,
tum the unit off and check the connections in
step 3.
6. Reinstall the top cover with the seven screws.
Line Fuse,
MDL Series
Line Voltage Slo-Blo
100 Vac 0.25 A/250 V
120 V ac 0.25 A/250 V
220 V ac 0.10 A/250 V
240 V ac 0.10 A/250V
TABLE Il
Main Fuse Selection Guide
100 VAC PRIMARY WIRING
U 7 -
>, 5 vs e
337
FR 7
120 VAC PRIMARY WIRING
то
PUR
SWITCH
TABLE 1
Primary Power Conversion Chart for 100-, 120-, 220- and 240-V, 50/60-Hz Operation
220 VAC PRIMARY WIRING
ur U
FA
— а) 6
+
240 VAC PRIMARY WIRING
то
РА
SWITCH
page 16
THE DELTAMAX™ SYSTEM
INSTALLATION (continued)
Mounting
The unit is one rack-space high (13%/4") and fits a
standard EIA 19-inch rack. To make wiring easier,
mount the controller near the power amplifier(s).
Grounding
A widely accepted grounding technique for audio
systems is the star connection (single-point)
ground. The final configuration will be determined
by the size of the system and the equipment used
in the system. However, the star connection is rec-
ommended as a starting point.
The interconnecting cables of line level equipment,
such as the DeltaMax"* controller should have the
shields connected at one point only, usually the receiv-
ing end of the signal transmission. See Figure 8.
Never lift the third wire safety ground of the ac
power cable. It protects against possible shock
hazard.
When deciding how to best ground the controller in
a particular system, note that the controller's input
and output XLR-type connectors have pin 1 refer-
enced to chassis ground through a 20 k resistor
and a .01pF capacitor. This minimizes the possibil-
ity of a ground loop. Circuit ground ties to the chas-
sis ground internally at one point. The input to the
controller is active differential and the output is
transformer isolated.
Installation/Maintenance
Ventilation
Adequate ventilation should be provided in the rack
to maintain a reasonable operating temperature.
The ambient temperature inside the rack cabinet
should not exceed 60°C (140°F) under any condi-
tions.
Security
A security cover and attachment screws are sup-
plied to protect the control settings against
uninvited adjustments.
Maintenance
Use a soft damp cloth to clean the unit. No other
maintenance is required.
page 17
THE DELTAMAX™ SYSTEM Figures
2 + IN
De a as o STE Im
LJ LL oN
Ne ee == = ——] POWER
GND AMPLIFIER
DeltaMax™ CONTROLLER
OUTPUT (ONLY ONE
CHANNEL SHOWN) Ch
FIGURE 7 - DeltaMax™ Output Connection
GAIN
CONTROL
BUS
SENSE INPUTS OUTPUTS A INPUT
EE) === 00 00 © ©
НЕ LF HF LF
HF LF
SENSE SENSE NT CARTE
CABLE CABLE
OUTPUTS INPUTS
A A. POWER
oO OO AMPUFIER © ©
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CHANNEL CHANNEL CHANNEL CHANNEL
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o na a a
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FIGURE B - Interconnections for Single Channel Operation
page 18
THE DELTAMAX™ SYSTEM
Figure
GAIN
CONTROL
BUS
SENSE INPUTS
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i die e WE LEFT RIGHT
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DML-1122A LF x A 3
FIGURE 9 - Interconnection for Stereo Operation
page 19
Assembly View of P.C. Board
THE DELTAMAX™ SYSTEM
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page 20
THE DELTAMAX™ SYSTEM
MAIN P.C. BOARD
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Schemati
THE DELTAMAX™ SYSTEM
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Schemati
THE DELTAMAX™ SYSTEM
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THE DELTAMAX™ SYSTEM
Service/Warranty
SERVICE/WARRANTY INFORMATION
SHIPPING DAMAGE
Inspect the shipping carton for possible damage. If
damage is found, notify the transportation company
immediately. Save the carton as evidence for the
carrier to inspect. If damage occurs during ship-
ping, it is the responsibility of.the consignee to file a
claim with the carrier, If the carton is in good condi-
tion but the unit is damaged, call Electro-Voice.
Included in the box with the DeltaMax™ Controller
is a power cord, warranty card, two operating volt-
age labels, a 1/10 amp fuse for 220-240 V ac, and
this manual.
FIELD SERVICE
Controller Power Inspection
If the DMC power indicator does not light:
1. Check the power switch.
2. Check the line cord.
3. Check the fuse.
4
Check the mains voltage and DMC operating
voltage configuration.
SERVICING THE SPEAKER SYSTEM
The DML-1122A was designed for expedient field
service. The foam grille may be removed by simply
grabbing a corner and gently peeling it off. Once
the screws securing the steel grille are removed
(using a #2 Phillips screwdriver), the grille may be
lifted off. Loosening the four woofer clamp bolts
(using a straight-blade screwdriver, or a ¥/s-inch
nutdriver or socket wrench) allows the woofer to be
easily removed. Once the horn-mounting screws
are removed (using a #2 Phillips screwdriver), the
compression driver may be accessed through both
the horn and woofer cutouts in the baffle board and
my be removed from the horn (using a 3/a-inch
socket wrench). A woofer failure will require re-
placement of the entire driver. In the case of com-
pression driver failure, a diaphragm assembly
replacement kit with instructions is available; or, if
desired, the complete driver may be returned for
service.
Listed below are the available driver replacement
and/or repair parts as well as a variety of other user
serviceable items that are available from the
Electro-Voice service department in Buchanan,
Michigan: EV Part Numbers
ltem DML-1122AP/1122APF
Complete woofer 812-1372
HP driver diaphragm Kit B1147XX
Logo nameplate assy. 81680
Foam grille 72711
Steel grille assy. 81922
Input panel sub-assy. 81865
Connector (NLAMP-R) 17305
Cable Connector 17306
WARRANTY (Limited)
Electro-Voice products are guaranteed against mal-
function due to defects in materials or workmanship
for a specified period, as noted in the individual
product-line statement(s) below, or in the individual
product data sheet or owners manual, beginning
with the date of original purchase. If such malfunc-
tion occurs during the specified period, the product
will be repaired or replaced (at our option) without
charge. The product will be returned to the cus-
tomer prepaid. Exclusions and Limitations: The
Limited Warranty does not apply to: (a) exterior fin-
ish or appearance; (b) certain specific items de-
scribed in the individual product-line statement(s)
below, or in the individual product data sheet or
owner's manual; (¢) malfunction resulting from use
or operation of the product other than as specified
in the product data sheet or owner's manual; (d
malfunction resulting from misuse or abuse of the
product; or (e) malfunction occurring at any time
after repairs have been made to the product by
anyone other than Electro-Voice or any of its autho-
rized service representatives. Obtaining Warranty
Service: To obtain warranty service, a customer
must deliver the product, prepaid, to Electro-Voice
or any of its authorized service representatives to-
ether with proof of purchase of the product in the
orm of a bill of sale or receipted invoice. A list of
authorized service representatives is available from
Electro-Voice at 600 Cecil Street, Buchanan, MI
49107 (616/695-6831 or 800/234-6831) and/or
Electro-Voice West, at 8234 Doe Avenue, Visalia,
CA 93291 (209/651-7777 or 800/825-1242). Inci-
dental and Consequential Damages Excluded:
Product repair or replacement and return to the
customer are the only remedies provided to the
customer. Electro-Voice shall not be liable for any
incidental or consequential damages including,
without limitation, injury to persons or property or
loss of use. Some states do not allow the exclusion
or limitation of incidental or consequential PD es
so the above limitation or exclusion may not apply
to you. Other Rights: This warranty gives you spe-
cific legal rights, and you may also have other
rights which vary from state to state.
Electro-Voice Speakers and Speaker Systems
are guaranteed against malfunction due to defects
in materials or workmanship for a period of five (5)
years from the date of original purchase. The Lim-
ited Warranty does not apply to bumed voice coils
or malfunctions such as cone and/or coil damage
resulting from improperly designed enclosures.
Electro-Voice Electronics are guaranteed against
malfunction due to defects in materials or workman-
ship for a period of three (3) years from the date of
original purchase. Electro-Voice Flying Hardware
(including enclosure-mounted hardware and rigging
accessories) is guaranteed Aga malfunction due
to defects in materials or workmanship for a period
of one (1) year from the date of original
purchase.Additional details are included in the Uni-
form Limited Warranty statement.
Service and repair address for this product: Electro-
Voice, Inc., 600 Cecil Street, Buchanan, Michigan
49107 (616/695-6831 or 800/234-6831).
Specifications subject to change without notice.
page 28
THE DELTAMAX™ SYSTEM
DMC-1122B REPAIR PARTS LIST
Power Supply Board Assembly (27-01-038256)
C1,C5,C6 15-01-124502 Capacitor, 10uf, 50 volt,
aluminum electroylitic,
Radial Lead
03,04 15-01-124505 Capacitor, 1000uf,
20 volt, aluminum
electroylitic, Radial Lead
C2 15-02-026884 Capacitor, 0.01uf,
- 250 volt, ceramic,
UL approved
U1 17-01-121660 |.C., voltage regulator,
+15V, LM7815
2 17-01-121659 1.C., voltage regulator,
-15V, LM7915
U3 17-01-119087 — |.C., voltage regulator,
+5V, LM7805
CRi 48-02-037580 Bridge Rectifier, 1.5 amp,
pc mount
CR2, CR3, CR5 48-02-042787 Diode, 1N4004, 400V, 1A
CR4 39-01-124973 LED, green
Fi 51-04-124634 Fuse, 175mA, 250V,
slow blow
Ti 56-08-025906 Transformer, power,
pc mount
DMC-1122B Main Board Assembly (27-01-028359)
C53,C70 15-01-027316 Capacitor, 100uf, 35V,
aluminum electrolytic
C222,C322 15-01-027317 Capacitor, 1000uf, 35V,
aluminum electrolytic
C206,C306,C54,
C71 15-01-027327 Capacitor, 47uf, 25V,
aluminum electrolytic
C12 15-01-028703 Capacitor, 4.7uf, 63V,
aluminum electolytic
C6.011,0321 15-01-028850 Capacitor, 1uf, 35V,
aluminum electrolytic
C212,C221 15-01-028851 Capacitor, 2.2uf, 35V,
aluminum electrolytic
C201,C203,C224,
C301,C303,C324 15-01-122935 Capacitor, 10uf, 35V,
aluminum electrolytic
C14 15-01-026831 Capacitor, 220pf, 50V,
ceramic
C41,C50,C51,C58
C67,C68 15-02-027325 Capacitor, 150pf, 100V,
ceramic
C1,C3,C4,C5 15-02-027326 Capacitor, 1500pf, 100V,
ceramic
£9,0202,C203 15-02-027455 Capacitor, 100pf, 50V,
ceramic
C10 15-02-028803 Capacitor, 330pf, 50V,
ceramic
Repair Parts List
C2,C7,C8,C55,C56,
C57,C72,C73,C74
C701,C702,C703,
C704,C705,C706,
C707,C708,C709,
C710,0711,0712,
C713,C714,C715,
C716,C717,C718 15-02-100307 Capacitor, 0.01uf, 100V,
Z5U ceramic
C52,C59,C60,C69,
C208,C211,C216,
C217,C220 15-06-026822 Capacitor, 0.1uf, 50V,
5%, mylar
C13,042,C43,C44,
C307,C504,C506,
C507,C508,C512,
£513 15-06-026823 Capacitor, 0.001uf, 50V,
5%, mylar
С45 15-06-026824 Capacitor, 0.0047 и?,
50V, 5%, mylar
C213 15-06-026825 Capacitor, 0.012uf, 50V,
5%, mylar
C223 15-06-027320 Capacitor, 0.0015uf,
50\, 5%, mylar
C63,C64 15-06-027321 Capacitor, 0.0082uf,
50V, 5%, mylar
C15,020,021,022
C23,C323 15-06-027322 Capacitor, 0.01uf, 50V,
5%, mylar
С207,С209,С210,
C214,C215,C218,
C219 C501 15-06-027367 Capacitor, 0.047uf, 50V,
5%, mylar
C505,0509,0510 15-06-028020 Capacitor, 0.022uf, 50V,
10%, mylar
C312 15-06-028155 Capacitor, 0.33uf, 50V,
5%, mylar
C314,C315 15-06-028852 Capacitor, 0.0018uf,
50V, 10%, mylar
C308,C313 15-06-028853 Capacitor, 0.0068uf,
50V, 10%, mylar
A201,A202,A203,
A204,A301,A302,
A303,A305 17-01-027338 1.C., RC4136
A502,A505,A506 17-01-028867 — L.C., LM339
A503,A504 17-01-028902 — I.C., LM393P
A2 17-01-028905 1.C., dbx2150A
A7 17-01-028906 1.C., CA3046
A5 17-01-028907 I.C., NES517N
A1,A3,A10,A11,
A12,A16 17-01-122832 1.C., NE5523A
A4 A13,A18,A21 17-01-124461 I.C., TLO74CN
A20,A501 17-01-124688 1.C., TLO72CP
Jz 21-01-028908 Connector, % inch phono
jack, right angle
Ji 21-01-124470 Connector, XLR, female,
right angle
page 29
THE DELTAMAX™ SYSTEM
Repair Parts List
R21 47-01-102112 Resistor, 27K, 5%, %W
R27,R28,R28,
R223,R234,R579,
R580,R581 47-01-102113 Resistor, 30K, 5%, Y4W
R229,R230,R262 47-01-102115 Resistor, 36K, 5%, 4W
R31,R32,R217,
R249,R317 47-01-102120 Resistor, 51K, 5%, %4W
R247 47-01-102121 Resistor, 56K, 5%, %W
R23,R232,R233 47-01-102122 Resistor, 62K, 5%, %W
R19,R124 47-01-102123 Resistor, 68K, 5%, %W
R365 47-01-102124 Resistor, 75K, 5%, AW
R12,R36,R40,R269,
R315,R360,R504,
R505,R511,R512,
R513,R520,R521,
R522,R538,R541,
R544 47-01-102127 Resistor, 100K, 5%, VW
R245,R246 47-01-102128 Resistor, 110K, 5%, WW
R344 47-01-102132 Resistor, 160K, 5%, “W
R330 47-01-102886 Resistor, 390K, 5%, WW
R260 47-01-104541 Resistor, 330K, 5%, AW
R537,R540,R543 47-01-108441 Resistor, 240K, 5%, WW
R156 47-01-108491 Resistor, 1M, 5%, %W
R33,R34,R35,R38,
R215,R231,R241,
R341 47-01-109204 Resistor, 470K, 5%, %W
R272 47-01-109298 Resistor, 180K, 5%, "AW
R503 47-01-112203 Resistor, 200K, 5%, AW
R363 47-01-113206 Resistor, 5.6M, 5%, “WW
R54,R133,R136 47-03-027328 Resistor, 806, 1%, '4W
R96 47-03-027331 Resistor, 44.2K, 1%, VW
R157 47-03-028159 Resistor, 4.53K, 1%, VW
R57,R58,R50,R60 47-03-028214 — Resistor, 12.7K, 1%, iW
R151 47-03-028857 Resistor, B.06K, 1%, WW
R240,R340 47-03-038218 Resistor, 536K, 1%, UW
R155 47-03-109431 Resistor, 36.5K, 1%, AW
R226,R327 47-03-109434 Resistor, 20.0K, 1%, VW
R3,R4,R6,R7,
R115,R125,R129,
Ri31,R132,8124,
R135,R139,R212,
R213,R222,R224,
R225,R227,R237,
R238,R242,R512,
R313,R324,R325,
R326,R337,R328,
R342,R501,R502 47-03-119305 Resistor, 10.0K, 1%, %W
R218,R220,R318,
R320 47-03-119305 Resistor, 100K, 1%, УМУ
R219,R221,R319,
J4,J5 21-01-124642 Connector, XLA, male,
right angle
D507 39-01-028846 LED, green
D509 39-01-028893 LED, red
D508,0510,0511,
D512,0513,0514,
D516,D517,0519,
D520 39-01-028894 LED, yellow
R271 47-01-027332 ” Resistor, 4.7K, 5%, WW
R236,R250 47-01-027461 Resistor, 4.3K, 5%, '4W
R13 47-01-028860 Resistor, 51, 5%, VW
R244 47-01-028862 Resistor, 2M, 5%, '4W
R270,R362 47-01-028865 Resistor, 3.6M, 5%, '4W
R510 47-01-102051 Resistor, 75, 5%, “WW
R2,R5,R117,R141 47-01-102054 Resistor, 100, 5%, “WW
R10 47-01-102062 Resistor, 220, 5%, “AW
R509,R524 47-01-102075 Resistor, 750, 5%, 14W
R17,R267,R359, A514
R523,R525,R526,
R527,R528,R536,
R539,R546,R547,
R549,RA550,R552,
R553 47-01-102078 Resistor, 1K, 5%, “W
R101 47-01-102080 Resistor, 1.2K, 5%, '4W
R518,R519 47-01-102085 Resistor, 2K, 5%, KW
R37 47-01-102086 Resistor, 2.2K, 5%, '4W
R210 47-01-102087 Resistor, 2.4K, 5%, “WW
R39,R264 47-01-102088 Resistor, 2.7K, 5%, KW
R161,R343 47-01-102089 Resistor, 3K, 5%, “WW
Ri46,A329 47-01-102080 — Resistor, 3.3K, 5%, '4W
R162,R314,R351,
R517 47-01-102092 Resistor, 3.9K, 5%, YaW
H14,R214,R235,
R310,R506,R508,
R528,R530,R531,
R532,R533.R534,
R555,R556,R558,
R559 R561,R562 47-01-102094 Resistor, 4.7K, 5%, AW
R22,R30,R92,
A119,R364 47-01-102095 Resistor, 5.1K, 5%, WWW
R251 47-01-102096 Resistor, 5.6K, 5%, AW
R128,R143,R350 47-01-102097 Resistor, 6.2K, 5%, WW
R265,R582,R584 47-01-102099 Resistor, 7.5K, 5%, Y4W
R16,R108,R109,R111,
R112,R114,R1186,
R137,R140,R216,
R268,R316,R361,
R535 47-01-102102 Resistor, 10K, 5%, *4W
A9,R263 47-01-102104 Resistor, 12kK, 5%, WW
R20 47-01-102105 Resistor, 13K, 5%, YW
R18,R24,R150,
243 R248,R583,
R585,R587 47-01-102106 Resistor, 15K, 5%, “W
R1,R8,6R15,R118,
R142 47-01-102109 Rasistor, 20K, 5%, MW
R347
47-01-102110
Resistor, 22K, 5%, '4W
R93,R94,R122,
R123, R261,R262,
R507,R516
47-01-102111
Resistor, 24K, 5%, WW
R321 47-03-121532 Resistor, 1.00K, 1%, “W
R515 47-03-121651 Resistor, 14.7K, 1%, “UW
R100 47-03-121737 Resistor, 10.7K, 1%, UW
R121 47-03-123010 Resistor, 13.0K, 1%, “WW
R328 47-03-124484 Resistor, 15.0K, 1%, AW
R228,R323 47-03-124615 Resistor, 30.1K, 1%, “W
RSS 47-03-124648 Resistor, 1.78K, 1%, MW
RS0 47-03-124654 Resistor, 8.87K, 1%, “WW
R126,R239,R339 47-03-124655 Resistor, 11.3K, 1%, “W
R148 47-03-124685 Resistor, 12.1K, 1%, UW
page 30
THE DELTAMAX™ SYSTEM
R56,R322 47-03-124696 Resistor, 4.99K, 1%, “UW
R51,R55,R144 47-03-124697 Resistor, 3.24K, 1%, 4W
R52,R53 47-03-124699 Resistor, 1.15K, 1%, “WW
R120,R91 47-06-027344 Potentiometer, 50K-B
K86, CC, 16mm, vertical
R26 47-06-027459 Potentiometer, 5k,
trimmer
R204,R304 47-06-028556 Potentiometer, 50k,
| 16mm, vertical
R11 47-06-028818 Potentiometer, 50k,
trimmer
R266,R273,R358,
R366 47-06-028910 Potentiometer, 100k,
trimmer
D1,D2,D3,D4,D5,
08,09,010,011,
D12,013,0100,D101,
D102,D103,D114,
D115,0116,0117,
D201,0202,D203,
D204,D207,D208,
D209,D210,D211,
0212,0213,0215,
D216,0218,D219,
0220,0301,0302,
0303,0304,0307,
D308,D309,D310,
0311,0312,0313,
D315,0316,D318,
D319,0320,D501,
D502,0503,D504,
D505 48-01-027340 Diode, Signal, 1N4447
D205,D206,D305,D306 48-01-028163 Diode,
Zener, 6.2V, 185234
D525,0526 48-01-028891 Diode, Zener, 15V,
1N4744
D222,0322 48-01-028892 Diode, Zener, 7.5V,
1N4737A
0221,0321 48-01-028896 Diode, Zener, 3.9V,
1N4730A
swi 51-02-028058 Switch, push ON/push
OFF
12,13 56-07-026392 transformer, audio
output
Repair Parts List
page 31