Crest Audio CA4 Appendix A - Amplifier Specifications, Crest Audio CA Series Power Amplifiers

Appendix A - Amplifier Specifications

1kHz, 0.01% THD+N
8Ω Stereo Power		160W	250W	400W	600W	700W	1000W (.03% THD+N)
4Ω Stereo Power		250W	435W	600W	900W	1200W	1800W (.03% THD+N)
2Ω Stereo Power		N/A	500W	750W	1000W	1400W	2500W (.03% THD+N)
8Ω Bridged Mono Power		500W	830W	1200W	1800W	2400W	3600W (.03% THD+N)
4Ω Bridged Mono Power		N/A	1000W	1500W	2000W	2800W	5000W (.03% THD+N)
20Hz-20kHz, 0.1% THD+N
8Ω Stereo Power		150W	245W	350W	550W	650W	950W
4Ω Stereo Power		200W	400W	500W	800W	1100W	1700W
2Ω Stereo Power		N/A	450W	600W	900W	1100W	2400W
8Ω Bridged Mono Power		450W	800W	1000W	1600W	2200W	3400W
4Ω Bridged Mono Power		N/A	900W	1200W	1800W	2200W	4800W
Max RMS Output Voltage (each channel)		44V	58V	73V	82V	90V	99V
Max Peak Output Voltage		62V	82V	103V	116V	126V	140V
Frequency Response (+0 / -0.3dB, 1W/8Ω )		20Hz-20kHz, -3dB@135kHz	20Hz-20kHz, -3dB@135kHz	20Hz-20kHz, -3dB@135kHz	20Hz-20kHz, -3dB@135kHz	20Hz-20kHz, -3dB@135kHz	20Hz-20kHz, -3dB@150kHz
Power Bandwidth (rated power at 4Ω , 1%THD+N)		20Hz-20kHz, -.9dB/+.15dB	20Hz-20kHz, -.9dB/+.5dB	20Hz-20kHz, -1.1dB/+0dB	20Hz-20kHz, -.84dB/+0dB	20Hz-20kHz,-.23dB/+.85dB	20Hz-20kHz, -.2dB/+.2dB
TourClass Protection			ACL, IGM, AutoRamp, short circuit, DC voltage, turn-on/off transient, current inrush, sub/ultrasonic input
THD+N (rated power, 4Ω /1kHz)		<0.01%	<0.01%	<0.01%	<0.01%	<0.01%	<0.03%
SMPTE IMD (rated power, 8Ω , 60 Hz & 7kHz)		<0.01%	<0.01%	<0.01%	<0.01%	<0.01%	<0.01%
Damping Factor (10-400Hz at 8Ω )		368:1	550:1	400:1	700:1	800:1	800:1
Input CMRR (1kHz)		> - 60 dB	> - 60 dB	> - 60 dB	> - 60 dB	> - 60 dB	> - 70dB
Standard Input Sensitivity (rated power at 8Ω ) ‡		0.775V	0.775V	0.775V	0.775V	0.775V	0.775V
Standard Voltage Gain (rated power @ 8Ω ) ‡		X45	X61	X68	X86.5	X97.5	X115
Input Impedance (balanced/unbalanced)		>20kΩ />10kΩ	>20kΩ />10kΩ	>20kΩ />10kΩ	>20kΩ />10kΩ	>20kΩ />10kΩ	>20kΩ />10kΩ
Hum and Noise ("A" weighted, full power at 4Ω )		-105dB	-105dB	-105dB	-105dB	-105dB	-115dB
Crosstalk ("A" weighted, full power at 4Ω )		> - 60dB	> - 60dB	> - 60dB	> - 60dB	> - 60dB	> - 80dB
	Class	AB	AB	H	H	H	H
Input Connectors (per channel)				Female XLR (pin 2+, configurable for pin 3+), TRS (tip+)
Output Connectors (per channel)			5-way binding posts (2 pair on CA18) or Speakon connectors (market dependent)
Filter Storage		20,000 ∝F	27,200 ∝F	68,000 ∝F	80,000 ∝F	140,000 ∝F	144,000 ∝F
Power Supply (factory configured)		100V-240V, 50-60Hz	100V-240V, 50-60Hz	100V-240V, 50-60Hz	100V-240V, 50-60Hz	100V-240V, 50-60Hz	100V-240V, 50-60Hz
Idle Current Draw (120V)		1.2A	1.4A	1.6A	2.0A	2.8A	3.0A
1/8 Power Curr. Draw (typical music cond.,	120V/4Ω )	3.25A	6.8A	6.0A	8.6A	10.5A	12.0A
1/3 Power Curr. Draw (cont. music cond.,	120V/4Ω )	5.5A	10.0A	13.0A	16.0A	23.0A	25.0A
Max Curr. Draw (continuous music cond., 120V/4Ω )		9.0A	15.0A	18.0A	21.0A	30.0A	36.0A
Thermal Emissions (1/8 Power, 4Ω )		1119 BTU/hr	2030 BTU/hr	2630 BTU/hr	3250 BTU/hr	4750 BTU/hr	7125 BTU/hr
Thermal Emissions (1/3 Power, 4Ω )		1607 BTU/hr	2726 BTU/hr	3713 BTU/hr	4341 BTU/hr	6300 BTU/hr	9450 BTU/hr
	Cooling		Two rear panel variable speed DC fans, filters detatchable without tools
	Controls	Front panel: 2 attenuators, magnetic circuit breaker/power switch; Rear panel: signal ground lift & mode switches;				CA18: XLR polarity & input sens./voltage gain switches)
LED Indicators (per channel)				Clip/Limit, Signal, Temp/DC, Active
Construction				Steel chassis, 16 gauge. Double thickness in rack ear areas.
Dimensions (Height x Width x Depth to rear rack ears)		3.5" x 19" x 18"	3.5" x 19" x 18"	3.5" x 19" x 18"	3.5" x 19" x 18"	5.25" x 19" x 18"	5.25" x 19" x 18"
		89 x 483 x 457mm	89 x 483 x 457mm	89 x 483 x 457mm	89 x 483 x 457mm	133 x 483 x 457mm	133 x 483 x 457mm
Gross Weight		38 lbs. (17.25 kg)	46 lbs. (20.88 kg)	49 lbs. (22.24 kg)	52lbs. (23.60 kg)	72 lbs. (32.68 kg)	82 lbs. (37.23 kg.)
Net Weight		33 lbs. (14.98 kg)	41 lbs. (18.61 kg)	44 lbs. (19.97 kg)	47 lbs. (21.33 kg)	67 lbs. (30.42 kg)	77 lbs. (34.96 kg.)
Warranty		5 years*	5 years*	5 years*	5 years*	5 years*	5 years*

†For full power at 4 Ohms. ‡ See table below for optional settings. * 3-Year Warranty with 2 additional years if Registration Card is sent to Crest Audio. (USA, Canada, United Kingdom and many other countries). Crest Audio reserves the right to make changes or improvements in manufacturing or design which may affect specification. ©1997 Crest Audio Inc. 10/13/97

CA2

CA4

CA6

CA9

CA12

CA18

Gain

Sens

Gain

Sens

Gain

Sens

Gain

Sens

Gain

Sens

Gain

Sens

Factory Standard

X45

.775V

X61

.775V

X68

.775V

X86.5

.775V

X97.5

.775V

X115

.775V

Option 1

X40

.866V

X40

1.12V

X40

1.32V

X40

1.66V

X40

1.87V

X40

2.24V

Option 2

X20

1.73V

X20

2.24V

X20

2.65V

X20

3.32V

X20

3.74V

X20

4.47V

Appendix A	Crest Audio CA Series Power Amplifiers
	Models CA2, CA4, CA6, CA9, CA12, CA18