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 1500 integrates cost-effective
design with exceptional sonic accuracy, long-term reliability,
and the basic features required for cinema sound applica-
tions. The Multiplex 1500’s remarkable price/performance
ratio is the result of innovative engineering and highly effi-
cient manufacturing in Crest's modern USA facility along
with nearly two decades of leadership in professional amplifier
design. The Multiplex 1500 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 1500 embodies the Crest Audio
tradition of roadworthy ruggedness and reliability. For example,
the Multiplex 1500 includes the same TourClass protection fea-
tures as found in Crest’s CA and CK Family amplifiers. The
Multiplex 1500 will endure virtually any type of mishap or sys-
tem stress – whether from uncontrolled upstream oscillation,
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 1500 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
, 0.1% THD+N
400w
750w
1500w
Power figures are watts per channel, both channels driven.
1500
Multiplex 1500 power amplifier
4
Ω
stereo
Multiplex 900
Multiplex 1100
1
kHz
, 0.1% THD+N
400w
550w
power specifications:
other Multiplex Series power amplifiers
