QSC Audio CX254, CX404 Multiply currents by 0.5 for 230V units, CX 4-Channel, Specifications

CX 4-Channel				Specifications
		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	−
(typical of program material at
	4Ω	9.2 A	12.4 A	−
maximum unclipped power)
	2Ω	14.3 A	NR	−
	70V	−	–	8.3 A
1/3 power pink noise	8Ω	8.8 A	12.2 A	−
(typical of program material	4Ω	14.2 A	19.3 A	−
with severe clipping)
	2Ω	21.7 A	NR	−
	70V	−	−	12.7 A
* Multiply currents by 0.5 for 230V units

Specifications subject to change without notice.

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CX 4-channel Spec Sheet - 06/04/08