description
features
TourClass
®
protection circuits
acl
active clip limiting
prevents speaker damage by
providing gentle gain reduction at the clipping threshold.
igm
instantaneous gain modulation
monitors speaker loads to
detect conditions that may overstress output devices, allowing safe
operation into difficult impedances.
autoramp
gradually increases gain to the attenuator level-
settings when the amplifier is turned on.
Protection features include:
thermal runaway,input overload, dc,
short circuit, in-rush current, and turn-on/turn-off transients
.
The Crest Audio Multiplex 900 integrates cost-effective design
with exceptional sonic accuracy, long-term reliability, and the
basic features required for cinema sound applications. The
Multiplex 900’s remarkable price/performance ratio is the
result of innovative engineering and highly efficient manufac-
turing in Crest's modern USA facility along with nearly two
decades of leadership in professional amplifier design. The
Multiplex 900 offers a welcome balance of exceptional audio
performance and overall value. However, no compromises in
component selection or quality control were permitted as a
shortcut to cost reductions.
In every respect, the Multiplex 900 embodies the Crest Audio
tradition of roadworthy ruggedness and reliability. For exam-
ple, the Multiplex 900 includes the same TourClass protection
features as found in Crest’s CA and CK Family amplifiers.
The Multiplex 900 will endure virtually any type of mishap or
system stress – whether from uncontrolled upstream oscilla-
tion, extreme ambient heat, or accidental shorting – without
damage to internal circuitry or connected speakers.
.
robust “over-built” power supply – massive filter capacitors and
a high-output custom transformer provide ample current for solid
bass performance, even when driving low impedance loads.
.
more output transistors – by using more output devices than
comparable models, the Multiplex 900 puts less stress on each device
yielding a wider safe operating area (
SOA
) and long-term reliability.
.
wide-band design – frequency response extends from 10
Hz
to
20
kHz
(-3
dB @
165
kHz
), ensuring powerful sub-bass performance as
well as detailed, transparent high-frequency response.
.
more effective cooling – large, extruded aluminum heatsink and
front-mounted, two-speed 4-inch fan prolonging amplifier life by
minimizing internal temperatures.
.
front panel magnetic circuit-breaker/power switch
.
rear panel knobs attenuators (with cover)
.
differentially-balanced
¼
-inch
TRS
and Barrier Strip Input Connectors
.
five-way binding post or Speakon output connectors
(market dependent)
.
LED
indicators –
SIGNAL PRESENT
,
CLIP
,
ACTIVE
, and
PROTECT
.
stereo/bridged-mono mode select switch
.
five-year warranty*
power specifications
8
Ω
stereo
4
Ω
stereo
8
Ω
bridged
1
kHz
, 0.01% THD+N
230w
400w
800w
Power figures are watts per channel, both channels driven.
900
Multiplex 900 power amplifier
4
Ω
stereo
Multiplex 1100
Multiplex 1500
1
kHz
, 0.01% THD+N
550w
750w
power specifications:
other Multiplex Series power amplifiers
