Crest ca18 Guia De Especificaciones
v. 1.3 11/25/97 B5000020
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL
: 201.909.8700
FAX
: 201.909.8744
http://www.crestaudio.com
C A 1 8 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
XLR Pin +
GAIN
Ø
dBu
40x 20x
A
B
+
A B
A
A
A B
A
A
B
B
A
B
B
A
+
+
+
+
Designed & manufactured in the USA by:
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
2 3
1
3
2
XLR Pin +
GAIN
Ø
dBu
40x 20x
A
B
+
2 3
1
3
2
A B
A
A
A B
A
A
B
B
Designed & manufactured in the USA by:
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
B
A
NL4FC
B
A
Power figures are watts per chan-
nel, both channels driven.
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).
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.
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.
ture is available in downloadable
PDF format; visit our website at:
http://www.crestaudio.com.
©1997 Crest Audio Inc.
Rear View,
Binding Post
Version
Rear View,
Speakon
Version
(not available in
North America)
1kHz, 0.03% THD+N
20Hz-20kHz, 0.1% THD+N
1000W
950W
1800W
1700W
2500W
2400W
3600W
3400W
5000W
4800W
99V
140V
20Hz-20kHz, -3dB@150kHz
20Hz-20kHz, -.2dB/+.2dB
ACL, IGM, AutoRamp, short circuit, DC voltage,
turn-on/off transient, current inrush, sub/ultrasonic input.
<0.03%
<0.01%
800:1
> - 70dB
.775V standard (switchable; see table below)
X115 standard (switchable; see table below)
>20k
Ω
/>10k
Ω
-115dB
> - 80dB
H
Female XLR (pin 2+, switchable for pin 3+), TRS (tip+)
Speakon connectors or 2 pair of 5-way output binding posts
144,000
µ
F
100V-240V, 50-60Hz
3.0A
12.0A
25.0A
36.0A
7125 BTU/hr
9450 BTU/hr
Back-to-front via 2 rear panel mounted variable-speed DC fans
(filters removable without tools)
Front Panel: 2 attenuators; Rear Panel Switches: signal ground lift,
mode select, gain select, XLR input pin 2/3 hot (+)
Clip/Limit, Signal, Temp/DC, Active
Steel chassis, 16 gauge. Double thickness in rack ear areas.
5.25" x 19" x 18" / 133 x 483 x 457mm
82 lbs. (37.23 kg.), 77 lbs. (34.96 kg.)
5 years
*
8
Ω
Stereo Power
4
Ω
Stereo Power
2
Ω
Stereo Power
8
Ω
Bridged Mono Power
4
Ω
Bridged Mono Power
Max RMS Output Voltage
(each channel)
Peak Output Voltage
(each channel)
Frequency Response
(+0 / -0.3dB, 1W/8
Ω
)
Power Bandwidth
(rated power at 4
Ω
, 1% THD+N)
TourClass
®
Protection
THD+N
(rated power at 4
Ω
, 1kHz)
SMPTE IMD
(rated power at 8
Ω
, 60Hz & 7kHz)
Damping Factor
(10-400Hz at 8
Ω
)
Input CMRR
(1kHz)
Input Sensitivity
(rated power at 8
Ω
)
Voltage Gain
Input Impedance (balanced/unbalanced)
Hum and Noise
(“A” weighted, full power, 4
Ω
)
Crosstalk
(“A” weighted, full power, 4
Ω
)
Class
Input Connectors
(per channel)
Output Connectors
(per channel) (market dependent)
Filter Storage
Power Supply
(factory configured)
Idle Current Draw 120V
1/8 Power Curr. Draw
(typical music, 120V/4
Ω
)
1/3 Power Curr. Draw
(continuous music, 120V/4
Ω
)
Max Curr. Draw
(circuit breaker rating, 120V/4
Ω
)
Thermal Emissions
(1/8 Power, 4
Ω
)
Thermal Emissions
(1/3 Power, 4
Ω
)
Cooling
Controls
LED Indicators
(per channel)
Construction
Dimensions
(Height x Width x Depth)
Gross Weight, Net Weight
Warranty
Gain
Sens
Dealer-Configurable Gain/Sensitivity Options
Factory Standard
X115
.775V
Option 1
X40
2.24V
Option 2
X20
4.47V
*B5000020*
Architect’s & Engineer’s Specifications
The power amplifier shall have two channels. At 8 ohms, 20Hz
- 20kHz, 0.1% THD+N, it shall deliver a minimum of 950 watts
per channel. At 4 ohms, 20Hz - 20kHz, 0.1% THD+N, it shall
deliver a minimum of 1700 watts per channel. In bridged mono
mode with an 8 ohm load, 20Hz - 20kHz, 0.1% THD+N, it
shall deliver a minimum of 3400 watts.
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.
Two rear panel mounted variable speed DC fans (filters
detachable without tools) shall provide back to front air flow
through the chassis.
Each channel shall have a standard (factory-set) input sensitiv-
ity of .775 volt, and shall be fitted with an external switch
which allows the gain to be altered to X20 or X40. The hum
and noise level shall be 115 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 H out-
put stage. The frequency response shall be 20Hz-20kHz, +0,
-0.3dB (1W 8
- 20kHz, 0.1% THD+N, it shall deliver a minimum of 950 watts
per channel. At 4 ohms, 20Hz - 20kHz, 0.1% THD+N, it shall
deliver a minimum of 1700 watts per channel. In bridged mono
mode with an 8 ohm load, 20Hz - 20kHz, 0.1% THD+N, it
shall deliver a minimum of 3400 watts.
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.
Two rear panel mounted variable speed DC fans (filters
detachable without tools) shall provide back to front air flow
through the chassis.
Each channel shall have a standard (factory-set) input sensitiv-
ity of .775 volt, and shall be fitted with an external switch
which allows the gain to be altered to X20 or X40. The hum
and noise level shall be 115 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 H out-
put stage. The frequency response shall be 20Hz-20kHz, +0,
-0.3dB (1W 8
Ω
).
The amplifier will operate at 100V-240V, 50-60 Hz AC (config-
ured at factory). Maximum current draw shall not exceed 36
amperes at 120VAC (limited by front panel breaker).
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, rear-panel switchable for pin 2 (factory setting) or pin 3
positive. Output terminations shall be Speakon connectors or 2
pair of 5-way output binding posts (market dependent). Rear
panel switches for ground lift, Stereo/Parallel/ Bridged Mono
mode, XLR polarity and gain selection shall also be provided.
A rear-panel AC mains cord having an appropriate AC plug
for the intended operating voltage shall be provided.
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, 5.25" (133mm) high and 18"
(457mm) deep. The amplifier shall weigh 77 lbs. (34.96 kg.)
net, and shall be designated the Crest Audio model CA18 .
ured at factory). Maximum current draw shall not exceed 36
amperes at 120VAC (limited by front panel breaker).
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, rear-panel switchable for pin 2 (factory setting) or pin 3
positive. Output terminations shall be Speakon connectors or 2
pair of 5-way output binding posts (market dependent). Rear
panel switches for ground lift, Stereo/Parallel/ Bridged Mono
mode, XLR polarity and gain selection shall also be provided.
A rear-panel AC mains cord having an appropriate AC plug
for the intended operating voltage shall be provided.
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, 5.25" (133mm) high and 18"
(457mm) deep. The amplifier shall weigh 77 lbs. (34.96 kg.)
net, and shall be designated the Crest Audio model CA18 .