Crest Audio Ci 20 X 4 Manual de usuario

Multi-Channel

Power Processing

Amplifiers

™

SERIES

FEATURES OVERVIEW:

• Four- and eight-channel versions available, each rated @

200 watts per channel @ 8 ohms or 70 volts (100-volts

isolated outputs with optional accessories).

• Individual channels may be selected as low impedance or

70 volt

• Tour Class® protection

• Front and rear panel indicators for amplifier status

• Variable-speed fan

• Sequential turn-on standard

• Euro-style input connectors

• Barrier strip output connectors

• One controlled-voltage input per channel standard

• One fault relay per channel standard

• Module bay provided to input Nx module bay accessories

for full amplifier control and monitoring via NexSys® 4

software or MediaMatrix® product and digital audio

distribution

• 100- and 50-volt operation supported with external

accessories

• EN60849 and ANSI60849 compliant with optional

accessories

DESCRIPTION:

The Ci Series is the next generation family of elevated efficiency

amplification from Crest Audio. Ci amplifiers are designed to

drive low-impedance or 70-volt speaker loads without bridging

between channels. Bridged operations are supported for

additional power into 8-ohm loads or 140-volt operation.

As with all Crest Audio products, sonic performance is of

primary importance. In addition, high-efficiency, comprehensive

load protection and compact packaging have been achieved in

the Ci design.

The Ci Series amplifiers incorporate Crest Audio’s tried-and-

true modular approach to intelligent amplifier configuration.

Through the provision of a single module bay, these amplifiers

may accommodate modules that facilitate load monitoring,

digital audio delivery and Crest Audio’s NexSys networking.

A full complement of features and options makes this series

very versatile, whether powering airport systems, restaurant

audio or a myriad of other applications. The Ci Series amplifiers

bring a new generation of amplification to Crest Audio.

Power Ratings Dual Bridged

8Ω 4Ω 70 volt 8Ω 140 volt

Ci 20x8 220 w 150 w 200 w 300 w 400 w

Ci 20x4 220 w 150 w 220 w 300 w 440 w

1kHz, 0.02% THD+N Power figures are watts per channel, all channels driven.

(Ci 20x8 model shown)

™

Product Specifications

frequency response 1W @ 8 ohms 5 Hz to 20 kHz, +/-1 dB

power bw rated power @ 4 ohms, 1% THD+N 20 Hz to 20 kHz, +/-1 dB

THD + N <0.02% @ rated power (@ 70 volt, 1kHz)

damping factor 200:1 @ 8 ohms (20 Hz to 100 Hz)

input CMRR >60 dB @ 1kHz

gain / input sensitivity @ 70 volts 1.14 volts for full rated output power (70 volt switch selected)

gain / input sensitivity @ 8Ω 0.775 volts for full rated output power (Low Z switch selected)

input impedance >20 kohms balanced, >10 kohms unbalanced

hum and noise > -97 dB, A-weighted below rated power @ 8 ohms

crosstalk > -60 dB below max rated power (1 kHz)

power supply Linear with toroid transformer

Ci 20x4 Ci 20x8

circuit breaker rating (120V/230V) 6A / 3A 12A / 6A

current draw (120VAC) 1/8 power, 70 volts 2.3A 4.0A

1/3 power, 70 volts 4.4A 8.0A

at idle <1.0A <2.0A

thermal emissions 1/3 Power, 70 volts btu / hr 621 947

cooling Front to side via variable speed fan

input connectors balanced three-pin Euro-style (rear panel)

output connectors barrier strips (rear panel)

power sequence connectors balanced three-pin Euro-style (rear panel)

fault connectors balanced three-pin Euro-style (rear panel)

control voltage connectors balanced two-pin Euro-style (rear panel)

controls front panel: three-position On / Off / Remote power switch

rear panel: stepped attenuators, 70V/Low Z switch, dual/bridged switch,

circuit breaker

LED indicators front and rear panels: Signal, ACL/IGM, Protect, Active, Power Present

construction 16-gauge steel chassis, double thickness in rack ear areas

dimensions (h x w x d) 3.5" x 19" (front panel) 17" (chassis) x 17.3" (18.55" to rack ears)

warranty five years *U.S.A., Canada, United Kingdom and many other countries

Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications.

Crest Audio Inc.

5022 HWY 493 N Meridian, MS 39305 USA

Printed in the U.S.A. 80307271 TEL: 601.486.2000 FAX: 601.486.1380 www.crestaudio.com

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