Crest Audio VS900 Brochure page 2

8Ω Stereo Power †
4Ω Stereo Power †
2Ω Stereo Power †
8Ω Bridged Power †
4Ω Bridged 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 Protection
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 & Noise
("A" weighted, full power at 4Ω)
Crosstalk
("A" weighted, full power at 4Ω)
Input Connectors
Output Connectors
Filter Storage
Power Supply
(factory configured)
Idle Current Draw
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
Rear View, Binding Post Version
643-210
+ + +
Output Output
Ch.B Bridge Ch.A
CLASS 2 WIRING MAY BE USED
CAUTION
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
† Power figures are watts per channel, both channels driven, 1kHz, 1% THD+N. * 3-Year Warranty with 2 additional years is Registration Card is sent to Crest Audio. (USA, UK, Canada, and
many other countries). Crest Audio reserves the right to make improvements in manufacturing or design which may affect specification. Crest Audio specification literature is available in
downloadable PDF format; visit our website at: http://www.crestaudio.com.
v. 2.3 5/20/97 B1000025
V s 9 0 0 P O W E R A M P L I F I E R
S P E C I F I C AT I O N S
250 Watts
450 Watts
550 Watts
900 Watts
1100 Watts
52.3V
148V
10Hz-20kHz, -3dB @ 165kHz
20Hz-20kHz
ACL, IGM, AutoRamp, short circuit,
DC voltage, turn-on/off transient, current inrush,
sub/ultrasonic input.
<1.0%
<0.1%
>1000:1
> - 64dB
(1 kHz)
1.0 V
X40
>20kΩ/>10kΩ
-105 dB
> - 60 dB
Class AB
TRS (tip +) & Barrier Strip
(per channel)
5-way binding posts or Speakon
(per channel)
(market dependent)
38,000 µF
100V-240V, 50-60Hz
2.8A
(120V)
7.2A
10.4A
15.0A
2000 BTU/hr
2900 BTU/hr
Cooling Front to Side via one 110 CFM, 2-Speed AC fan
Controls Front panel: magnetic circuit breaker/power
switch. Rear Panel: 2 attenuators, mode select
switch.
1 Clip, 1 Signal per channel, Protect, Active
14 gauge steel
5.25" x 19" x 12" / 133 x 483 x 305mm
46 lbs. / 20.9 kg., 44 lbs. / 20.0 kg.
Warranty 5 years*
Designed & manufactured in the USA by:
Serial Number
Crest Audio Inc.
100 Eisenhower Dr.
Paramus New Jersey, 07652 USA
B A
+
A B
5 4 5 6
4 6
3 7 3 7
A+B
2 8 2 8
1 9 1 9
0 10 0 10
B A
B1000025
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 have two channels. Each channel shall deliver a
minimum of 250 watts at 8 ohms, 450 watts at 4 ohms and 550 watts at 2
ohms, 1kHz, 1% THD+N. In bridged mono mode, it shall deliver 900 watts
at 8 ohms and 1100 watts into 4 ohms, 1kHz, 1% THD+N
The amplifier shall be front-to-side cooled, with a two-speed AC fan.
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 attenua-
tor setting levels when the amplifier is turned on, and circuitry for imped-
ance sensing and active clip limiting.
The amplifier shall have a voltage gain of X40 with an input sensitivity of
1.0V for rated power at 8 ohms. THD+N shall be less than 1.0% at 4Ω,
1kHz. The hum and noise level shall be 105 dB below rated output, "A"
weighted. SMPTE IMD shall be less than 0.1%, rated power at 8Ω, 60Hz
and 7kHz. The amplifier shall have a class AB output stage. The frequency
response shall be greater than 10Hz-20kHz +0/-0.3dB, 1W/8Ω.
The amplifier shall operate at 100V-240V, 50-60 Hz AC (configured at
factory). Maximum current draw shall not exceed 15 amperes at 120VAC,
(circuit breaker limited), with both channels driven continuously into a 4
ohm resistor.
A combination power switch/magnetic circuit breaker shall be mounted on
the front panel. Front panel indicators shall include an "Active" LED, a
"Protect" LED, "Signal" LED and a "Clip" LED (one per channel).
Gain attenuators shall be rear panel mounted. A rear panel Bridge/Stereo
mode select switch shall be provided. Rear panel input connectors shall be
an actively balanced TRS (tip +), and barrier strip for each channel.
Output connectors shall be Speakon or 5-way binding posts (market
dependent). Rear mounting ears shall be provided.
A rear-panel IEC AC mains socket 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 han-
dles shall be available. Dimensions shall be 5.25" (133mm) high x 19"
(483mm) wide x 12" (305mm) deep. The amplifier shall have a net weight
of 44 lbs. (20.0 kg). The amplifier shall be designated the Crest Audio
model Vs900.
Rear View, Speakon Version
643-016
NL4FC
B
A+B
+
(not available in North America)
A
Designed & manufactured in the USA by:
Crest Audio Inc.
100 Eisenhower Dr.
Paramus New Jersey, 07652 USA
B
+
5 5
4 6 4 6
3 7 3 7
2 8 2 8
1 9 1 9
0 10 0 10
B A
©1997 Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
: 201.909.8700
TEL
http://www.crestaudio.com
Serial Number
A
+
A B
A+B
Crest Audio Inc.
: 201.909.8744
FAX
Printed in USA