DeltaMax
TM
DMS-1152/64 Loudspeaker System
DeltaMax
TM
DMS-1152/64 Loudspeaker System
2
Power-Handling Test
Electro-Voice components and systems are
manufactured to exacting standards to en-
sure reliability in continuous use in ardu-
ous real-life conditions. Besides utilizing
industry-standard power tests, extreme in-
house power tests which push the perfor-
mance bounadries of the loudspeakers are
also performed for an extra measure of reli-
ability. The DMS-1152/64 systems are rated
per ANSI/EIA RS-426-A Loudspeaker
Power Rating, Full Range Test, which uses
a shaped-random-noise signal to simulate
typical music to test the mechanical and
thermal capabilities of the loudspeakers.
The Dx34 digital electronic unit was used
to provide the necessary crossover filters
and equalization during power testing.
Specifically, the DMS-1152/64 passes the
ANSI/EIA RS-426-A power test with the
follwing test parameters:
Low-Frequency Section:
P
E(MAX)
:
600 watts
Test Voltages:
58.7 volts rms
117.4 volts peak
R
SR
(1.15 R
E
):
5.75 ohms
High-Frequency Section:
P
E(MAX)
:
60 watts
Test Voltages:
17.6 volts rms
35.2 volts peak
R
SR
(1.15 R
E
):
5.18 ohms
Crossover, Equalization and Time-Delay
Controller
The DMS-1152/64 speaker system and vari-
ants are designed as an integrated pack-
age that utilizes any of the following con-
trollers: DMC-1152X, or Electro-Voice Dx34
digital crossover system. Optimal perfor-
mance of the DMS-1152/64 speaker sys-
tem can only be assured when using the
above referenced controllers.
All controllers used with the DMS-1152/
64 feature a 1,480-Hz crossover frequency
utilizing 24-dB-per-octave Linkwitz-Riley
filters. All contain fixed time delay and
equalization for optimum performance of
the DMS-1152/64. Protection circuitry in
the DMC-1152X controller also ensures
maximum reliability and functionality.
Electrical Connection and System
Wiring
Electrical connections to the DMS-1152/
64 are made on the back of the enclosure
via a 4-pin conncector. There are two con-
nectors on the input panel to allow paral-
leling of other DMS-1152/64 systems. The
Neutrik Speakon
®
NL4MPR is used for
both connections. The pin assignments
are as follows:
Pin 1+: LF(+)
Pin 1-: LF(–)
Pin 2+: HF(+)
Pin 2-: HF(–)
The wiring diagram of the loudspeaker sys-
tem is shown in Figure 7. The electrical
impedance is shown in Figure 6.
Amplifier Requirements
Power amplfiers with the following ratings
are recommended for use with the DMS-
1152/64 speaker systems:
LF: 600-1,200 watts continuous into 8 ohms
HF: 125-250 watts continuous into 8 ohms
DMS-1152/64 speakers may be paralleled
only with other DMS-1152/64 speakers if
the amplifier is capable of delivering full
power at the lower impedances. The use
of amplifiers with lower power ratings is
acceptable; however, the full-power capa-
bilities of the DMS speakers will not be
realized. The use of amplifiers with signifi-
cantly higher power ratings will generate
maximum dynamic range and fidelity, but
care must be utilized for longer duration
signals as mechanical and thermal damage
are possible in the system. Under certain
circumstances, higher rated amplifiers are
acceptable. It is acceptable to drive the
DMS-1152/64 speakers with a stereo power
amp utilizing one channel to drive the low
frequencies and the other channel to drive
the high frequencies. See owner's manu-
als on various controllers for appropriate
settings.
Flying the DMS Systems
A manual entitled the DMS Flying Manual
is available from Electro-Voice, and is in-
cluded with each flying DMS loudspeaker
system. A brief introductory overview is
included here. The DMS Flying Manual
should be consulted for complete struc-
tural specifications and detailed informa-
tion on safely suspending and using the
DMS systems.
The DMS-1152/64PF is the version of the
DMS-1152/64 loudspeaker system that in-
cludes flying hardware. The DMS sys-
tems incorporate a unique, two-point fly-
ing system that permits a wide range of
vertical angle adjustment, and offers maxi-
mum flexibility in array design for both tour-
ing sound and permanent installations.
The quick release, aircraft-rated, heavy-
duty L-track-type hardware design allows
arrays of loudspeakers to be assembled
(and disassembled) very quickly, and of-
fers such flexibility in the vertical angling
of cabinets that pull-up points are usually
unnecessary. Furthermore, all of the fly-
ing DMS loudspeaker models include the
same rigging hardware, allowing different
models to be mixed as necessary through-
out an array.
The working-load limit (for an 8:1 safety
factor) for each rigging point on the DMS
loudspeaker enclosure is 227 kg (500 lb)
for a 0° pull angle and 170 kg (375 lb) for a
90° pull angle when used with the New
Haven NH32101-2S double-stud fitting,
and 113 kg (250 lb) when used with the
New Haven NH8192-2 or Ancra 42546-10
single-stud fittings with locking pins. The
working-load limit (for an 8:1 safety fac-
tor) for the overall enclosure is 340 kg (750
lb). (Consult the DMS Flying Manual for
specific structural ratings and limitations.)
The enclosures may be oriented with the
rigging track on the sides of the enclosure,
or on the top and bottom, and may be
daisy-chained together as long as the
safety factor is 8:1 or greater, and local
regulations are met. For fire safety and ad-
ditional structural strength in both flying
orientations, top-to-bottom and side-to-
side metal straps link the rigging track in-
side the enclosure. Electro-Voice offers a
line of flying-hardware accessories for use
with the DMS loudspeaker systems. All
associated rigging is the responsibility of
others.
CAUTION: The DMS loudspeaker sys-
tem should be suspended overhead only in
accordance with the procedures and limi-
tations specified in the DMS Flying
Manual and manual updates notices.
Field Replacement
