Crest audio CKV800 SPECIFICATIONS

CKV800 POWER

PROCESSING AMPLIFIER

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 efficien­cy, 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 pro­cessing, 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.

CKV800 Features

• 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 thresh­old) 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 ampli­fier, 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.

• 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*

Power Specification 70.7 Volt

20Hz - 20kHz, 0.1% THD+N 400W

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

CKV800 POWER PROCESSING AMPLIFIER

Output Power, 70.7 Volt

Max RMS Output Voltage

(each channel)

Peak Output Voltage (each channel)

Frequency Response (+0 / -0.3dB, 1W/70.7V)

Power Bandwidth (full power, 1% THD+N)

TourClass®Protection

(rated power, 1kHz)

THD+N

SMPTE IMD (rated power, 60Hz & 7kHz)

Input CMRR (1kHz)

Input Sensitivity (rated power)

Standard Voltage Gain
Input Impedance (balanced/unbalanced)
Hum and Noise

(“A” weighted, rated power)

Crosstalk (“A” weighted, rated power)

Input Connectors

(per channel)

Output Connectors (per channel)

Filter Storage

Power Supply

(factory configured)

Idle Current Draw 120V

1/8 Power Curr. Draw

(typical music, 120V/70.7V)

1/3 Power Curr. Draw (cont. music, 120V/70.7V)

Max Curr. Draw (breaker rating, 120V/70.7V)

Thermal Emissions (1/8 Power, 70.7V)
Thermal Emissions (1/3 Power, 70.7V)

Cooling

Controls

LED Indicators

(per channel)

Construction

Dimensions

(Height x Width x Depth)

Gross Weight, Net Weight

Warranty

Rear View

SPECIFICATIONS

20Hz-20kHz, 0.1% THD+N

400 Watts
92V
130V
10Hz-20kHz, -3dB @148kHz
10Hz - 20kHz, +0/-0.2 dB
ACL, IGM, AutoRamp, short circuit, DC voltage, turn­on/off transient, current inrush, sub/ultrasonic input.
<0.1% @ 70.7V out
<0.1% @ 70.7V out
>60 dB

1.77V @ 70.7V out
X40 (jumper-selectable for X20 or .775V sens.)
>20kΩ/>10kΩ

-105 dB
>-60dB

Class

AB
Rear-panel barrier strip input, 4-pin Phoenix sequential
turn-on/off connector on standard CC-STL module
Rear-panel barrier strip output
11,200 µF
100V-240V, 50-60Hz

0.8A (PowerSave active)

7.0A

10.1A
15A
2540 BTU/hr
3263 BTU/hr
Variable speed, front panel mounted fan,
front-to-side airflow
3-position front panel On/Remote/Off switch, two rear­panel channel attenuators, AC mains circuit breaker
Signal, ACL (one per ch.) Protect, Active
Steel chassis, 16 gauge.
Double thickness in rack ear areas.

5.25" x 19" x 17.13" / 133 x 483 x 435mm

58.20 lbs. (26.42 kg), 50.20 lbs. (22.80 kg)
5 years*

Architect’s & Engineer’s Specifications

The power amplifier shall consist of 2 channels and deliver a
minimum of 400 watts per channel into a 70.7 volt “constant
voltage” line without the need for external step-up transform­ers, both channels driven, 20Hz-20kHz, 0.1% THD+N.
A variable speed fan, with the ability to completely turn off
under appropriate ambient temperature conditions, shall pro­vide air flow through the chassis from front to both sides.
The amplifier shall have circuitry to protect itself and the
speaker load from output short circuits, DC voltage on out­puts, and thermal overload. The amplifier shall include cir­cuitry to gradually increase gain to attenuator setting levels
when amplifier is turned on, and circuitry for impedance
sensing and active clip limiting.
The amplifier shall include an energy saving feature which
shall automatically remove the output stage bias current when
the amplifier is in an idle condition.
The amplifier shall have a voltage gain of X40, or a voltage
gain of X20, or an input sensitivity of 0.775V, for rated
power, internally jumper-selectable. The hum and noise level
shall be greater than 105dB below rated output, “A” weight­ed. The amplifier shall have a class AB output stage (with a
modulated power supply). The frequency response shall be
greater than 20Hz-20kHz, +0, -0.3dB at rated power. The
amplifier shall operate at either 100, 120, 220, 230, or 240
volts, 50-60 Hz AC (configured at factory). Maximum current
draw at 120V shall be no greater than 15A, both channels dri­ven continuously into a 70.7V line. Front panel LED indica­tors shall include Active, Protect, Signal Present, and ACL
(Clip Limiting) LEDs for each channel. The power switch
shall have three positions; one to permit power up from a
remote location, one to permit local power up, and an ‘off’
position. The fan filter shall be front panel mounted, with no
tools required for removal.
The rear panel shall be configured with three openings or
bays which will accept plug-in modules used to accomplish
input signal processing, network control, remote sequential
turn-on/off and other related functions. The output module
shall be fitted with the following connectors: 5mm, 4-pin
Phoenix for sequential turn-on/off wiring, and an output bar­rier strip with 0.438" (11mm) screw spacing, and 0.320"
(8mm) lug space. The input module shall be fitted with an
input barrier strip connector with 0.320" (8mm) screw spac­ing, and 0.270" (7mm) lug space, and two individual channel
attenuators with removable knobs.
A user re-settable AC mains circuit breaker and a single
molded AC cord (suitable for a normal household AC outlet)
shall be mounted on the rear chassis.
The packaging of the amplifier shall allow for standard rack
mounting without requiring space between similar units.
Dimensions shall be 19" (435mm) wide, 5.25" (133mm) high
and 17.13" (435mm) deep. It shall weigh 50.20 lbs. (22.80 kg)
net. The amplifier shall be designated the Crest Audio model
CKV800.

*USA, Canada, United Kingdom,
and many other countries.

Power figures are watts per chan­nel, both channels driven. Crest
Audio reserves the right to make
improvements in manufacturing or
design which may affect specifica­tion. Crest Audio specification lit­erature is available in electronic
form to qualified users. Contact
Crest Audio Inc. for more infor­mation. ©1996 Crest Audio Inc.

v. 2.1 11/20/96 A3300011

LISTED 8B42

COMMERCIAL

POWER

AMPLIFIER

120V~60 Hz 15A

In

Out
Com

+8 to 18VDC
20 mA

NEC

CLASS 2 ONLY

Model
CC-STL

CLASS 2 WIRING

MAY BE USED

Output

–

A

+

+

B

–

Signal
Ground
Lift
Jumper

*A3300011*

Model

Output Power

Name

@70.7V

CKV 100

50W

CKV 200

100W

CKV 400

200W

CKV 800

400W

CKV 1600

800W

CKV 2400

1200W

Designed & manufactured in the USA by:

Paramus, New Jersey 07652 USA

Crest Audio Inc.

100 Eisenhower Dr.

Model
Name

CKS 100
CKS 200
CKS 400
CKS 800

CKS 800-2
CKS 1200-2
CKS 1600-2

Output Power

@8Ω/Ch.

50W
100W
200W
400W
400W
600W
800W

Model
CC-BLK

SEE INSTRUCTION MANUAL

Input B

Input A

–

–

+

+

Model
CC-IPB

Level

5

4

6

A

3

7

2

8

1

9

0

10

Level

5

4

6

B

3

7

2

8

1

9

0

10

Crest Audio Inc.

100 Eisenhower Dr., Paramus NJ 07652 USA

TEL: [phone] FAX: [phone]

http://www.crestaudio.com

Printed in USA