CX
4-Channel
Specifications
qscaudio.com
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
CX 4-channel Spec Sheet - 06/04/08
Specifications subject to change without notice.
CX254
CX404
CX204V
Stereo Mode (all channels driven)
Continuous average output power per channel
8
Ω
/ 20 Hz – 20 kHz / 0.05% THD
170 W
250 W
−
4
Ω
/ 20 Hz – 20 kHz / 0.05% THD
250 W
400 W (0.1% THD, 1 kHz)
−
2
Ω
/ 1 kHZ / 1% THD
450 W
−
−
70V / 20 Hz – 20 kHz / 0.05% THD
−
−
200 W
70V / 1 kHz / 0.05% THD
−
−
220 W
70V / 1 kHz / 1% THD
−
−
300 W
Bridge-Mono Mode
Bridge-mono mode operation
16
Ω
/ 20 Hz – 20 kHz / 0.1% THD
340 W
500 W
−
8
Ω
/ 20 Hz – 20 kHz / 0.1% THD
500 W
800 W (0.1% THD, 1 kHz)
−
4
Ω
/ 1 kHz / 1% THD
900 W
−
−
140V / 20 Hz – 20 kHz / 0.1% THD
−
−
400 W
140V / 1 kHz / 0.05% THD
−
−
440 W
140V / 1 kHz / 1% THD
−
−
600 W
Noise (20 Hz - 20 kHz)
-106 dB
-106 dB
-105 dB
Input Sensitivity
1.22 Vrms
1.22 Vrms
1.26 Vrms
Gain
29 dB at 8
Ω
31 dB at 8
Ω
35 db at 70.7V
Input Clipping
10 Vrms (+22 dBu)
10 Vrms (+22 dBu)
10 Vrms (+22 dBu)
Output Circuitry
Class AB+B
Class AB+B
Class AB+B
Distortion (SMPTE-IM)
< 0.01%
< 0.01%
< 0.02%
Distortion (typical)
20 Hz – 20 kHz: 10 dB below rated power
< 0.01% THD
1.0 kHz and below: full rated power
< 0.01% THD
Frequency Response
20 Hz - 20 kHz, ± 0.2 dB | 8 Hz - 50 kHz, + 0/-3 dB
Damping Factor
> 500 (1 kHz and below)
Input Impedance
6k ohms unbalanced, 12k ohms balanced
Cooling
Variable-speed fan / rear-to-front air flow through tunnel heat sink
Connectors
Input: 3 position Euro style detachable barrier block, CH 1, 2, 3 & 4 DataPort: HD-15 Connector, Ch 1+2, Ch 3+4
Output: Six-position barrier strip with dual channel and bridge mono connections, Ch 1+2, Ch 3+4
Controls
Front: AC swith, Ch 1, 2, 3 & 4 gain knobs
Rear: DIP switch for Ch 1, 2, 3 & 4, clip limiter on/off, LF filter on/off, LF filter freq select 33 Hz or 75 Hz
CX254 and CX 404: 50 Hz or 75 Hz CX204V: inputs parallel or stereo, bridge mode
Indicators
Parallel Inputs: Yellow LED / Bridged: Yellow LED/ Power-on: Green LED
Clip-Prot: Red LED / Level -10dB: Green LED / Level -20dB: Green LED / Signal -35dB: Green LED (1 per channel)
Amplifier Protection
Full short circuit, open circuit, thermal, ultrasonic, and RF protection. Stable into reactive or mismatched loads
Load Protection
On/off muting, DC-fault power supply shutdown
Dimensions (HWD)
3.5" (8.9 cm) 2 RU x 19" (48.3 cm) rack mounting x 14" (35.6 cm) from front mounting rails
Weight - Net / Shipping
21 lb (9.5 kg) / 27 lb (12.3 kg)
Power Requirements
100, 120, 230 VAC, 50 – 60 Hz (configured at factory)
120V Current Consumption*
Idle
0.7 A
0.7 A
0.8 A
1/8 power pink noise
8
Ω
5.8 A
8.1 A
−
4
Ω
9.2 A
12.4 A
−
2
Ω
14.3 A
NR
−
70V
−
–
8.3 A
1/3 power pink noise
8
Ω
8.8 A
12.2 A
−
4
Ω
14.2 A
19.3 A
−
2
Ω
21.7 A
NR
−
70V
−
−
12.7 A
* Multiply currents by 0.5 for 230V units
(typical of program material
with severe clipping)
(typical of program material at
maximum unclipped power)
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All other trademarks are the property of their respective owners. Patents may apply or be pending.
