Electro-Voice DELTAMAX DML-1152A Owner's Manual page 14

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-1152A 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
controller. 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/s-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 '/4-inch patch cable, con-
nect 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-1152B/DML-1152A full-range
system is used with the DMC-2181S/
DML-2181A subwoofer system, the controller's
Gain Control jacks should be connected togeth-
er between the two controllers to ensure flat-
frequency response when the controllers are
operating in the protection mode.
Loudspeaker Connections
The DML-1152A speaker system is equipped with
4-pin Neutrik Speakon™ NLAMPR 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, MI 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 4 = LF (+)
Pin 2- = HF (=)
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-fre-
quency 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-1152B controller; a stereo program source
requires two DMC-1152B controllers; etc. In addi-
tion, а DMC-2181S/DML-2181A subwoofer system
may be added to a DMC-1152B/DML-1152A sys-
tem. The DMC-21818 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 ОМС-21815 control-
ler and one DMC-1152B controller; a stereo pro-
gram source requires one DMC-2181S controller
and two DMC-1152B 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 Owner's Manual.) Amplifier in-
puts, 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
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