Crest Audio CPA900 - User Manual

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: short circuit, dc voltage,
comprehensive thermal management, current in-rush turn-
on/off transient, and sub/ultrasonic input.
The Crest Audio CPA900 professional power amplifier is
designed to achieve unsurpassed sonic performance and long-
term reliability – even when operating under extreme stress
– in touring or fixed installation applications.
Absolute sonic accuracy is the hallmark of every Crest ampli-
fier. Bass is solid and defined to the limits of audibility, with
ample current reserves delivered by an “over-engineered”
power supply and advanced Class
H circuitry. Wide-band-
width output devices assure detailed, transparent high fre-
quency response. And, thanks to Crest’s exclusive
IGM circuit,
the CPA900 will drive 2
Ω loads safely without compromise
in performance.
Construction and Quality Control
The CPA900 is built exclusively in Crest’s own USA manu-
facturing facility, with internal components selected for pre-
mium quality and proven durability. Each modular
subassembly is pre-tested, and the assembled CPA900 receives
a rigorous “hot room” burn-in before thorough final check-
out on precision test equipment.
.
Crest’s legendary “overbuilt” power supply
.
toroidal power transformer
.
latest generation of high-speed, wide-bandwidth output devices
.
twin tunnel cooling with back-to-front air flow
.
dual, variable speed DC fans
.
massive, extruded aluminum heat sinks
.
balanced XLR and
1
⁄4-inch (TRS) inputs
.
five-way binding post outputs or Speakon
™
connectors
(market dependent)
.
stereo/parallel/bridged mono mode selector switch
.
ground lift switch
.
input sensitivity selection
.
recessed, stepped attenuators
.
front panel circuit breaker switch
.
modular construction
.
five-year warranty*
power specifications 8Ω stereo 4Ω stereo 2Ω stereo 8Ω bridged 4Ω bridged
1kHz, 0.01% THD 600w 900w 1000w 1800w 2000w
20Hz-20kHz, 0.1% THD+N 550w 800w 900w 1600w 1800w
Power figures are watts per channel, both channels driven.
CPA900
CPA900 power amplifier
4Ω stereo CPA400 CPA600 CPA1200 CPA1800
1kHz, 0.01% THD+N 435w 600w 1200w 1800w
20Hz-20kHz, 0.1% THD+N 400w 500w 1100w 1700w
power specifications:
other CPA Series power amplifiers

Summary

Product Description

Key Features

Construction and Quality

Power Specifications Overview

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.

AUTORAMP

Gradually increases gain to the attenuator level settings when the amplifier is turned on.

Detailed Specifications

Power Output Ratings

Stereo and bridged mono power output across various impedances and frequencies.

Performance Metrics

Includes frequency response, power bandwidth, THD+N, SMPTE IMD, and damping factor.

Input and Sensitivity

Details input impedance, sensitivity, gain, hum and noise, and crosstalk.

Amplifier Configuration

Covers power supply, circuit breaker, current draw, and thermal emissions.

Connectors and Controls

Describes input/output connectors, front/rear panel controls, and LED indicators.

Physical Characteristics

Details construction, dimensions, and weight of the amplifier unit.

Architects Specifications

Crest Audio CPA900 Specifications

General

Brand	Crest Audio
Model	CPA900
Category	Amplifier
Language	English