C K X 8 0 0 P OW E R P RO C E S S I N G A M P L I F I E R
P R E L I M I N A R Y S P E C I F I C A T I O N S
A r c h i t e c t ’ s & E n g i n e e r ’ s S p e c i f i c a t i o n s
The power amplifier shall consist of 2 channels and deliver a
minimum of 400 watts per channel into a 100 volt “constant
voltage” line without the need for external step-up transform-
ers, both channels driven, 40Hz–16kHz, 0.1% THD+N.
A variable speed fan, with the ability to completely turn off
under appropriate ambient temperature conditions, shall pro-
vide 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 out-
puts, and thermal overload. The amplifier shall include cir-
cuitry 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 mod-
ulated power supply). The frequency response shall be
greater than 40Hz–16kHz, (-1dB) at rated power. The ampli-
fier shall operate at either 100, 120, 220, 230, or 240 volts,
50–60Hz AC (configured at factory). Maximum current draw
at 240V shall be no greater than 7.5A, both channels driven
continuously into a 100V line.
Front panel LED indicators shall include Active, Protect,
Signal Present, and ACL (Clip Limiting) LEDs for each chan-
nel. The power switch shall have three positions; one to per-
mit 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 a touch-proof
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 57lbs. (25.91kg) net.
The amplifier shall be designated the Crest Audio model
CKX800.
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL
: 201.909.8700
FAX
: 201.909.8744
http://www.crestaudio.com
Printed in USA
v. 1.1 10/3/97 A3300037
Rear View
Output Power, 100 volt (50 or 70.7 volt option)
Max RMS Output Voltage
(each channel)
Peak Output Voltage
(each channel)
Frequency Response
(1W/100V)
Power Bandwidth
(rated power, 1% THD+N)
TourClass
®
Protection
THD+N
(rated power, 1kHz)
SMPTE IMD
(rated power, 60Hz & 7kHz)
Input CMRR
(1kHz)
Input Sensitivity
(rated power)
Voltage Gain
Input Impedance
(balanced, unbalanced)
Hum and Noise
(below rated power)
Crosstalk
(below rated power)
Class
Input Connectors
(per channel)
Output Connectors
(per channel)
Filter Storage
Power Supply
(factory configured)
Idle Current Draw
(240V)
1/8 Power Current Draw
(typical music, 240V)
1/3 Power Current Draw
(cont. music, 240V)
Max Current Draw
(breaker rating, 240V)
Thermal Emissions
(1/8 Power, 240V)
Thermal Emissions
(1/3 Power, 240V)
Cooling
Controls
LED Indicators
(per channel)
Construction
Dimensions
(Height x Width x Depth)
Gross Weight, Net Weight
40Hz–20kHz, 0.1% THD+N
400 Watts
105V
150V
38Hz–38kHz, +0/-3dB
40Hz–16kHz, +0/-1dB
ACL, IGM, AutoRamp, short circuit, DC voltage, turn-
on/off transient, current inrush, sub/ultrasonic input.
<0.1%
<0.1%
>60dB
1.41V at X40 gain setting
X40 standard, X20 & 0.775V user-selectable
>20k
Ω
, >10k
Ω
105dB, A-weighted
>60dB @ 1kHz
AB
Rear-panel barrier strip input, 4-pin Phoenix sequential
turn-on/off connector on standard CC-STL module
Touch-proof rear-panel barrier strip output
32,800µF
100–240V, 50–60Hz
0.4A (PowerSave active)
3.5A
5.2A
7.5A
1195BTU/hr
1536BTU/hr
Variable speed, front panel mounted fan,
front-to-side airflow
3-position front panel On/Remote/Off switch, two rear-
panel channel attenuators, AC mains circuit breaker
Active, Protect, Channel Signal, Channel ACL
Steel chassis, 16 gauge.
Double thickness in rack ear areas.
5.25" x 19" x 17.13" / 133 x 483 x 435mm
65lbs. (29.55kg), 57lbs. (25.91kg)
Power figures are watts per chan-
nel, both channels driven.
Crest Audio reserves the right to
make improvements in manufac-
turing 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.
©1997 Crest Audio Inc.
*A3300037*
Com
Out
In
+8 to 18VDC
20 mA
Model
CC-STL
NEC
CLASS 2 ONLY
Sequential
Turn-On
Output
A
B
+
+
–
–
Signal
Ground
Lift
Jumper
CLASS 2
WIRING MAY
BE USED
7
8
9
5
2
0
1
3
4
6
10
7
8
9
5
2
0
1
3
4
6
10
Model
CC-IPB
Level
B
Level
A
Input A
Input B
+
+
–
–
Model
CC-BLK
Designed & manufactured in the USA by:
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
Model
Name
CKS 100
CKS 200
CKS 400
CKS 800
CKS 800-2
CKS 1200-2
CKS 1600-2
Output Power
@8
Ω
/Ch.
50W
100W
200W
400W
400W
600W
800W
Model
Name
CKV 100
CKV 200
CKV 400
CKV 800
CKV 1600
CKV 2400
Output Power
@70.7V/Ch.
50W
100W
200W
400W
800W
1200W
Model
Name
Output
Power
@100V/Ch.
CKX 150
CKX 300
CKX 500
CKX 800
75W
150W
250W
400W
