Rear View; Specifications - Crest Audio CA4 Specifications

8Ω Stereo Power
4Ω Stereo Power
2Ω Stereo Power
8Ω Bridged Mono Power
4Ω Bridged Mono Power
Max RMS Output Voltage
(each channel)
Peak Output Voltage
(each channel)
Frequency Response
(+0 / -0.3dB, 1W/8Ω)
Power Bandwidth
(rated power at 4Ω, 1% THD+N)
TourClass
THD+N
(rated power at 4Ω, 1kHz)
SMPTE IMD
(rated power at 8Ω, 60Hz & 7kHz)
Damping Factor
(10-400Hz at 8Ω)
Input CMRR
Input Sensitivity
(rated power at 8Ω )
Voltage Gain
Input Impedance (balanced/unbalanced)
Hum and Noise
("A" weighted, full power, 4Ω)
Crosstalk
("A" weighted, full power, 4Ω)
Input Connectors
Output Connectors
Filter Storage
Power Supply
(factory configured)
Idle Current Draw 120V
1/8 Power Curr. Draw
(typical music, 120V/4Ω)
1/3 Power Curr. Draw
(continuous music, 120V/4Ω)
Max Curr. Draw
(circuit breaker rating, 120V/4Ω)
Thermal Emissions
(1/8 Power, 4Ω)
Thermal Emissions
(1/3 Power, 4Ω)
LED Indicators
Construction
Dimensions
(Height x Width x Depth)
Gross Weight, Net Weight
Dealer-Configurable Gain/Sensitivity Options
Power figures are watts per chan-
nel, both channels driven.
* 3-Year Warranty with 2 addi-
tional years if Registration Card
is sent to Crest Audio. (USA,
Canada, United Kingdom, and
many other countries).
Crest Audio reserves the right to
make improvements in manufac-
turing or design which may affect
specification.
Crest Audio specification litera-
ture is available in downloadable
PDF format; visit our website at:
http://www.crestaudio.com.
©1997 Crest Audio Inc.
v. 2.6 11/25/97 B5000016
C A 4 P OW E R A M P L I F I E R
S P E C I F I C AT I O N S
1kHz, 0.01% THD+N
250W
435W
500W
830W
1000W
58V
82V
20Hz-20kHz, -3dB@135kHz
20Hz-20kHz, -.9dB/+.5dB
® Protection ACL, IGM, AutoRamp, short circuit, DC voltage,
turn-on/off transient, current inrush, sub/ultrasonic input.
<0.01%
<0.01%
550:1
> - 60dB
(1kHz)
0.775V standard (see table below)
X61 standard (see table below)
>20kΩ/>10kΩ
-105dB
> - 60 dB
Class
AB
Female XLR (pin 2+, dealer configurable for pin 3+), TRS (tip+)
(per channel)
5-way output binding posts or Speakon connectors
(per channel)
27,200 F
100V-240V, 50-60Hz
1.4A
6.8A
10.0A
15A
2030 BTU/hr
2726 BTU/hr
Cooling Back-to-front via 2 rear panel mounted variable-speed DC fans
(filters removable without tools)
Controls Front Panel: 2 attenuators
Rear Panel: signal ground lift switch, mode select switch
Clip/Limit, Signal, Temp/DC, Active
(per channel)
Steel chassis, 16 gauge. Double thickness in rack ear areas.
3.5" x 19" x 18" / 89 x 483 x 457mm
46 lbs. / 20.88 kg., 41 lbs. / 18.61 kg.
Warranty 5 years
*
Factory Standard
Option 1
Option 2

Rear View,

Binding Post
Version
Rear View,
Speakon
Version
(not available in
North America)
Architect's & Engineer's Specifications
20Hz-20kHz, 0.1% THD+N
The power amplifier shall have two channels. At 8 ohms, 20Hz
245W
- 20kHz, 0.1% THD+N, it shall deliver a minimum of 245 watts
400W
per channel. At 4 ohms, 20Hz - 20kHz, 0.1% THD+N, it shall
450W
deliver a minimum of 400 watts per channel. In bridged mono
800W
mode with an 8 ohm load, 20Hz - 20kHz, 0.1% THD+N, it
900W
shall deliver a minimum of 800 watts.
Two rear panel mounted variable speed DC fans (filters
detachable without tools) shall provide back to front air flow
through the chassis.
The amplifier shall have circuitry to protect itself from output
short circuits, thermal overload or other adverse load condi-
tions. The amplifier shall protect speaker loads from DC volt-
age on outputs. The amplifier shall have active clip limiting
and impedance sensing circuitry. Output relays shall protect
the speakers from amplifier failure.
Each channel shall have a standard (factory-set) input sensitiv-
ity of 0.775 Volts, and shall be fitted with an internal jumper
which allows the gain to be altered to X20 or X40. The hum
and noise level shall be 105 dB below rated output, "A"
weighted. SMPTE IMD shall be less than 0.01% at rated
power, 60Hz and 7kHz. The amplifier shall have a class AB
output stage. The frequency response shall be 20Hz-20kHz,
+0, -0.3dB (1W/8Ω).
(market dependent)
The amplifier will operate at 100V-240V, 50-60 Hz AC (config-
ured at factory). Maximum current draw shall not exceed 15
amperes at 120VAC (limited by front panel breaker for bench
tests).
Front panel indicators shall include Active, Protect, Signal,
and Clip LED's for each channel. Front panel attenuators
shall be recessed and detented.
Rear panel input connectors shall be female TRS and XLR
type, internally dealer-configurable for pin 2 (factory setting)
or pin 3 positive. Output terminations shall be 5-way output
binding posts or Speakon output connectors (market depen-
dent). A ground lift switch and a Stereo/Parallel/Bridged Mono
mode operation switch shall be provided.
A rear-panel IEC AC mains socket (with power cord) or single
AC mains cord having an appropriate AC plug for the intended
operating voltage shall be provided (market dependent).
The packaging of the amplifier shall allow for standard rack
mounting without requiring space between similar units.
Optional rack mount handles will be available. Dimensions
shall be 19" (483mm) wide, 3.5" (89mm) high and 18"
Gain Sens
X61 .775V
(457mm) deep. The amplifier shall weigh 41 lbs. (18.61 kg.)
X40 1.12V
net, and shall be designated the Crest Audio model CA4.
X20 2.24V
CAUTION
A
RISK OF ELECTRIC SHOCK
DO NOT OPEN
+
AVIS : RISQUE DE CHOC ÉLECTRIQUE—NE PAS OUVRIR
WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT
EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
ATTENTION! POUR ÉVITER LE RISQUE D'INCENDIE OU DE CHOC
ÉLECTRIQUE, NE PLACEZ PAS CET APPAREIL SOUS LA PLUIE OU Á
L'HUMIDITÉ +
A
B
+
B
NL4FC
A
A
B
B
*B5000016*
A A
Designed & manufactured in the USA by:
• •
A B
Crest Audio Inc.
100 Eisenhower Dr.
A
Paramus, New Jersey 07652 USA
+
A B
• •
A
B
A B
B
1 2+
3-
643-105
A
A
Designed & manufactured in the USA by:
• •
Crest Audio Inc.
A B
A 100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
+
A B
• •
A B
A B
B
1 2+
3-
100 Eisenhower Dr., Paramus NJ 07652 USA
: 201.909.8700
TEL
http://www.crestaudio.com
Crest Audio Inc.
: 201.909.8744
FAX