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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
8Ω / 20 Hz – 20 kHz / 0.05% THD 170 W 250 W −
4Ω / 20 Hz – 20 kHz / 0.05% THD 250 W 400 W (0.1% THD, 1 kHz) −
2Ω / 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
16Ω / 20 Hz – 20 kHz / 0.1% THD 340 W 500 W −
8Ω / 20 Hz – 20 kHz / 0.1% THD 500 W 800 W (0.1% THD, 1 kHz) −
4Ω / 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 8Ω 31 dB at 8Ω 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 8Ω 5.8 A 8.1 A −
4Ω 9.2 A 12.4 A −
2Ω 14.3 A NR −
70V − – 8.3 A
1/3 power pink noise 8Ω 8.8 A 12.2 A −
4Ω 14.2 A 19.3 A −
2Ω 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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