Service Manuals, User Guides, Schematic Diagrams or docs for : . Rare and Ancient Equipment CREST CPX 2600 hfe_crest_audio_cpx_900_1500_2600_en
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owner's manual CPX
S E R I E S
CPX power amplifier
20 23 20 23
ON
16 26 16 26
A B
6 29 6 29
(dB)
32 PWR SIG GCLTM GCLTM SIG PWR (dB)
32 CPX 2600 POWER AMPLIFIER
POWER
CPX 900
CPX 1500
CPX 2600
important precautions
1 Save the carton and packing materi-
Service Information
als! Should you ever need to ship Do not run the output of any ampli-
the unit, use only the original factory fier channel back into another Do not remove the cover!
packing. channel's input. Removing the cover will expose you
to potentially dangerous voltages.
For replacement packaging, call Crest Do not parallel- or series-con- There are no user serviceable parts
Audio's Customer Service Department nect an amplifier output with any inside.
directly. other amplifier output.
Equipment should be serviced
2 Read all documentation before Crest Audio is not responsible for by qualified service personnel
operating your equipment. Retain damage to loudspeakers for any rea- when:
all documentation for future reference. son.
A. The power supply cord or the plug has
Do not connect the inputs or out- been damaged.
3 Follow all instructions printed on
puts of amplifiers to any other
unit chassis for proper opera- voltage source: such as a battery, B. The equipment has been exposed to
tion. mains source, or power supply, rain.
regardless of whether the amplifier C. The equipment does not appear to
is turned on or off. operate normally, or exhibits a marked
Connecting amplifier outputs to change in performance.
4 Never hold a power switch or cir-
oscilloscopes or other test equip-
cuit breaker in the on-position, if D. The equipment has been dropped, or
ment while the amplifier is in the enclosure damaged.
it won't stay there by itself! bridged mono mode may damage
both the amplifier and test equip- To obtain service:
5 Do not use the unit if the electri-
ment! contact your nearest Crest Audio
cal power cord is frayed or bro- Service Center, Distributor, Dealer,
ken. or Crest Audio at 201.909.8700
The power supply cords should be USA
routed so that they are not likely to or visit www.crestaudio.com for
be walked on or pinched by items Do not spill water or other liquids
into or on the unit, or operate the additional information.
placed upon or against them.
unit while standing in liquid. email: [email protected]
6 Always operate the unit with the Do not block fan intake or
AC ground wire connected to the exhaust ports.
electrical system ground.
Precautions should be taken so that Do not operate equipment on a
the means of grounding of a piece of surface or in an environment
equipment is not defeated. which may impede the normal
flow of air around the unit: such
7 Damage caused by connection to as a bed, rug, weathersheet, car-
improper AC voltage is not cov- pet, or completely enclosed rack.
ered by any warranty. Mains voltage If the unit is used in an extreme-
must be correct and the same as that ly dusty or smoky environment:
printed on the rear of the unit. the unit should be periodically
8 Do not ground any hot (red) terminal. "blown free" of foreign matter.
Never connect a hot (red) output to Do not use the unit near stoves,
ground or to another hot (red) output! heat registers, radiators, or other
heat producing devices.
The power cord of equipment
should be unplugged from the out-
9 Power down and disconnect units let when left unused for a long peri-
from mains voltage before making od of time.
connections.
10 Do not drive the inputs with a
signal level greater than that
required to enable equipment to
reach full output.
CPX Owner's manual
1 introduction p.3
2 installation
unpacking
p.5
mounting
cooling and ventilation
powering
maintenance
3 features overview
front panel
p.11
rear panel
contents
4 application details
installations
p.23
bridged
GCL
5 connections
input
p.27
output
6 Specifications p.31
wire gauge charts p.32, 33
p. 1
1 introduction CPX owner's manual
p. 2
introduction 1
welcome
Congratulations on your purchase of a new CPX Series power amplifier, and
thank you for your confidence in Crest Audio products. You are among the grow-
ing number of audio professionals who have made Crest Audio one of the world's
leading suppliers of professional and commercial/industrial audio systems.
For your safety, please read the Important Precautions section before installing
and operating the amplifier. The Crest Audio CPX Series amplifiers are designed
for high operating efficiency and accurate sonic performance across the full audio
bandwidth, even under stressful conditions.
CPX series amplifiers feature a 2-way crossover and sub-sonic (low-cut) filter for
each channel. Crossover frequencies are fixed at 150 Hz, allowing subwoofers to
be driven at extremely high sound pressure levels, and the filters cut at 40 Hz to
prevent low-end rumble. Using proven technology gained through years of ampli-
fier design, this unit takes advantage of rugged TO-3P output devices mounted
on massive aluminum extrusions and dissipates heat via an extremely quiet and
effective 2-speed fan. CPX amplifiers employ mammoth toroidal power trans-
formers and offer impressive specifications and features not found on similarly
priced competitive units.
These amps are designed to drive a 2-ohm load per channel, thus achieving awe-
some performance levels into 4 ohms in BRIDGE mode. CPX amplifiers are
ruggedly constructed, rack-mountable pieces of gear with superb patching capa-
bility, allowing superior flexibility in application.
Front panel features include calibrated, detented gain (dB) controls and LED indi-
cators for power (PWR), signal presence (SIG), and GCL (Gain Comparator
Limiter) activation on each channel, as well as a rocker mains POWER switch.
The back panel contains an IEC connector for the mains power cord, a mains cir-
cuit breaker with reset, and the critical cooling fan opening. This opening should
have an adequate supply of cool air and should never be blocked or restricted.
Also on the back panel are the input and output sections, including an input bar-
rier strip for permanent installations. Each channel input section includes a combo
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