Crest Audio CKS1200-2

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CKS1200-2 POWER

PROCESSING AMPLIFIER

Power Specifications 8Ω Stereo 4Ω Stereo 2Ω Stereo

20Hz - 20kHz, 0.1% THD+N 600W 900W 1100W

1kHz, 0.02% THD+N 620W 940W 1130W

• Sequential Turn-On/Off (STO). Standard system uses any +8 to

+18VDC source and contact closure.

• PowerSave. Reduces power consumption at idle by turning off the

bias circuit (and fan if heat sink temperature is below allowed thresh-

old) when no signal present at input.

• 3 Module Bays. Unique chassis construction provides three separate

bays into which a diverse range of space-saving and cost effective

Input Processing, Network and Power/Output modules can be fitted.

By combining multiple processing and control functions in the ampli-

fier, CKS Series Power Processing amplifiers significantly save on

installation costs versus conventional outboard processing.

• Cool Operation. High thermal mass heat sinks, with high-efficiency

variable speed fan. Front panel mounted filter for easy maintenance.

• “Overbuilt” Power Supply. In the Crest tradition, the CKV power

supply is “over-engineered” for ample current reserves to meet

demanding load conditions.

• More Transistors. More output devices than comparably-powered

competitive models to provide wider safe operating area and lower

heat generation.

Product Description

The Crest Audio CKS1200-2 Power Processing amplifier is designed specifically for the unique requirements of high-quality commercial and indus-

trial sound installations. Design goals met by the CKS1200-2 include exceptional sonic accuracy, high efficiency, minimum power consumption,

comprehensive loudspeaker protection, and the ability to handle extended duty cycles.

In addition, the CKS1200-2 incorporates Crest Audio’s proprietary modular approach to input/output and external control configuration. We call this

concept Power Processing. Through the provision of three plug-in module bays, these amplifiers offer exceptional flexibility with integral signal pro-

cessing, load monitoring, and either local or system-wide computer control via Crest Audio’s NexSys

network.

The CKS1200-2 amplifier is manufactured exclusively in Crest Audio’s own USA plant, using only the highest quality components.

Key sub-assemblies are individually pre-tested, and all units are rigorously “burned-in” before final checkout on precision test equipment.

• TourClass

Protection Circuits:

ACL (Active Clip Limiting) prevents speaker damage with gentle

gain reduction at clip threshold.

IGM (Instantaneous Gain Modulation) monitors connected loads to

detect conditions that may overstress output devices, allowing safe

operation into difficult loads.

AutoRamp gradually increases gain to attenuator setting level when

amplifier is turned on.

TourClass also includes comprehensive thermal management, and

short circuit, DC voltage, turn-on/off transient, current inrush and

sub/ultrasonic input protection.

• Selectable input sensitivity/voltage gain (internal jumpers)

• UL certification

• Front panel status indication

• Rear panel attenuators with removable knobs

• Barrier strip input and output connectors

• Optional input isolation transformers

• Front panel label area

• Full five-year warranty*

CKS1200-2 Features

Figures are watts per channel, both channels driven. NexSys is a registered trademark of Crest Audio Inc.

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Summary

CKS1200-2 Features

Sequential Turn-On;Off (STO)

PowerSave Feature

Modular Input;Output Bays

Chassis offers three bays for versatile input processing, network, and power/output modules.

Robust Power Supply

Advanced Output Transistors

TourClass Protection Circuits

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

Audio Specifications

Power Output Ratings

Details stereo power output at 8, 4, and 2 ohms across different THD+N levels.

Frequency Response

Specifies the amplifier's frequency response range and attenuation at specific frequencies.

Input Sensitivity and Gain

Defines input sensitivity and selectable voltage gain options for different configurations.

Protection Circuitry

Lists protection features including ACL, IGM, and thermal management.

Cooling System

Architect and Engineer Specifications

Power Amplifier Output Requirements

Minimum power delivery at 8, 4, and 2 ohms per channel, both channels driven, 20Hz-20kHz, 0.1% THD+N.

Cooling System Design

Protection Circuitry Details

Includes circuitry for output short circuits, DC voltage, thermal overload, gain increase, and clip limiting.

Energy Saving Feature

Automatically removes output stage bias current when the amplifier is in an idle condition.

Input Gain and Sensitivity Options

Voltage gain options X40, X20, or 0.775V sensitivity, jumper-selectable.

Hum and Noise Level

Frequency Response Specification

Frequency response greater than 20Hz-20kHz, +0, -0.3dB at rated power.

AC Power Configuration

Module Bay Configuration

Connector Specifications

Crest Audio CKS1200-2 Specifications

General

Power Output (Bridge Mono, 8 Ohms)	1800W
Channels	2
THD (Total Harmonic Distortion)	< 0.03%
Signal-to-Noise Ratio	> 100 dB
Power Output (Stereo, 4 Ohms)	900W per channel
Cooling	Variable speed fan
Protection	DC protection, thermal protection, short circuit protection
Connectors	Inputs: XLR; Outputs: Binding post