Crest Audio PRO II SERIES 8002 - 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 nominal 2
Ω speaker loads.
autoramp gradually increases gain to the attenuator level-
settings when the amplifier is turned on.
Other protection features include: short circuit, dc voltage,
comprehensive thermal management, current in-rush turn-
on/off transient, and sub/ultrasonic input.
superior sound quality
excellent low frequency and transient response
louder than conventional amplifiers
—maximum output level never dips
constant, predictable performance
consistent power output
accepts any line voltage worldwide—50 or 60Hz
accepts long power cable runs with no loss of output power
draws significantly less peak current
lighter-duty power distribution components
low line-voltage distortion
minimal supply-ripple
cost-effective
extreme reliability
reduced shipping costs—half the weight of conventional amplifiers
The Pro II Series heralds a major advance in amplifier design
from Crest Audio. Extreme reliability and hallmark sonic accu-
racy of the legendary Professional Series is maintained in the
same rugged package—but at only half the weight. Such dra-
matic weight savings are made possible by PowerLok, a radical
new power-supply technology that provides significant perfor-
mance and flexibility advances over conventional designs.
PowerLok is Crest Audio’s unique implementation of Power
Factor Correction, which allows current to be drawn
throughout the entire cycle of the AC line-frequency, provid-
ing maximum output power, while drawing significantly
smaller peak currents from the AC line.
Compared with an amplifier using a conventional power-sup-
ply, PowerLok requires less peak power to produce identical
output power results—and because PowerLok’s current peaks
are smaller, a Pro II amplifier can be serviced by a lower-rated
breaker than a conventional amplifier of similar wattage.
.
PowerLok technology
.
dramatically reduced net weight
.
latest generation of high-speed, wide-bandwidth output devices
.
twin-tunnel cooling with back-to-front air flow
.
dual, rear-mounted, continuously-variable-speed fans
.
balanced male and female xlr inputs
with switch-configurable xlr polarity and sensitivity selection
.
Speakon and five-way binding post output connectors
.
stereo, parallel, bridged-mono: mode selector switch
.
ground-lift switch
.
front panel circuit-breaker switch
.
recessed, stepped attenuators
.
modular construction
.
aluminum chassis
.
five-year warranty
power specifications 8Ω stereo 4Ω stereo 2Ω stereo 8Ω bridged 4Ω bridged
1kHz, 0.01% THD+N 800w 1400w 2000w 2800w 4000w
20Hz-20kHz, 0.1% THD+N 750w 1350w 1900w 2700w 3800w
Power figures are watts per channel, both channels driven.
8002
8002 power amplifier

Crest Audio PRO II SERIES 8002 Specifications

General

Power Output (4 Ohms Bridged)	4000W
Power Output (4 Ohms)	1300W per channel
Power Output (2 Ohms)	2000W per channel
Frequency Response	20Hz - 20kHz, +0/-0.2dB
Input Impedance	20k Ohms balanced
Power Requirements	120V, 60Hz

Summary

Amplifier Description and Benefits

Superior Sound Quality

Provides excellent low frequency and transient response, offering louder output than conventional amplifiers.

Consistent Power Output

Accepts any line voltage worldwide (50 or 60Hz) and long power cable runs without loss.

Cost-Effectiveness

Features extreme reliability and reduced shipping costs due to its half-weight design.

Key Amplifier Features

PowerLok Technology

Radical new power-supply technology providing significant performance and flexibility advances.

Advanced Components and Cooling

Latest generation high-speed output devices and twin-tunnel cooling with variable-speed fans.

Connectivity and Controls

Balanced XLR inputs, Speakon/binding post outputs, mode selection, ground-lift, circuit breaker, and attenuators.

Build and Warranty

Modular construction, aluminum chassis, and a comprehensive five-year warranty.

TourClass Protection Circuits

Active Clip Limiting (ACL)

Prevents speaker damage by providing gentle gain reduction at the clipping threshold.

Instantaneous Gain Modulation (IGM)

Monitors speaker loads to detect conditions that may overstress output devices.

AutoRamp Gain Increase

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

Other Protection Features

Includes short circuit, DC voltage, thermal management, and transient protection.

Technical Specifications

Power Output Ratings

Detailed stereo and bridged mono power ratings at various impedances and THD+N levels.

Frequency Response and Bandwidth

Specifies frequency response at 1W @ 8 ohms and power bandwidth at rated power @ 4 ohms.

Distortion and Damping Factor

Lists THD+N, SMPTE IMD distortion, and damping factor specifications.

Input and Noise Specifications

Covers input CMRR, sensitivity options, impedance, hum, noise, and crosstalk.

Power Supply and Cooling

Details Power supply versions, circuit breaker rating, current draw, thermal emissions, and cooling method.

Connectors and Controls

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

Construction and Warranty

Information on chassis construction, dimensions, weight, and warranty coverage.