Crest Audio CKV800 - User Manual

CKV800 POWER
PROCESSING AMPLIFIER
Power Specification 70.7 Volt
20Hz - 20kHz, 0.1% THD+N 400W
• 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, CKV 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 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 CKV800 Power Processing amplifier is designed specifically for the unique requirements of high quality, 70V distributed sound
systems in commercial, industrial and institutional installations. Design goals met by the CKV800 include exceptional sonic accuracy, high efficien-
cy, minimum power consumption, comprehensive loudspeaker protection, and the ability to handle extended duty cycles.
In addition, the CKV800 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 CKV800 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*
CKV800 Features
Figures are watts per channel, both channels driven. NexSys is a registered trademark of Crest Audio Inc.

Crest Audio CKV800 Specifications

General

Brand	Crest Audio
Model	CKV800
Category	Amplifier
Language	English

Summary

Product Description

CKV800 Key Features

Sequential Turn-On;Off (STO)

Standard system uses any +8 to +18VDC source and contact closure for sequential power management.

PowerSave Feature

Reduces idle power consumption by turning off bias circuit and fan when no input signal is present.

Modular Input;Output Bays

Three bays for space-saving and cost-effective input processing, network, and power/output modules.

TourClass Protection Circuits

Includes ACL, IGM, AutoRamp, thermal, short circuit, DC voltage, and input protection for amplifier safety.

Operational Controls and Indicators

Features front panel status LEDs (Signal, ACL, Protect, Active) and controls for power and remote operation.

Power Specifications

Audio Specifications

Output Power and Voltage

Delivers 400 Watts into a 70.7 Volt line, with specified peak and RMS output voltages.

Frequency Response and Bandwidth

Details frequency response from 10Hz-20kHz with minimal attenuation at full power bandwidth.

Input Sensitivity and Gain

Configurable input sensitivity (1.77V or 0.775V) and selectable voltage gain (X40 or X20).

Noise and Crosstalk

Specifies noise levels below -105dB and crosstalk greater than -60dB for clean audio.

Construction and Connectivity

Chassis and Cooling

Features a steel chassis with variable speed fan and front panel filter for efficient cooling.

Input and Output Connectors

Barrier strip connectors for inputs/outputs and 4-pin connector for sequential turn-on/off.

Power Supply and Current Draw

Universal power supply (100-240V) with specified idle and power draw figures.

Architects and Engineers Specifications

Performance Requirements

Must deliver 400W per channel into 70.7V line, 20Hz-20kHz, 0.1% THD+N.

Protection and Control Features

Includes protection against shorts, DC voltage, thermal overload, and gradual gain increase.

Input and Output Module Bays

Rear panel features bays for plug-in modules for signal processing and network control.

Physical Dimensions and Weight

Standard 19-inch rack mountable dimensions and specified net weight.