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CX254

4-Channel Low-Z Power Amplifier

Compact size — only 2 RU and 14" deep for reduced rack cost and floor space
Bridgeable channels 1 + 2 and 3 + 4, for maximum flexibility
Active inrush limiting eliminates AC inrush current, removing the need for expensive power sequencers
HD15 DataPort connector for Q-SYS networked control and monitoring
Custom integrated security cover for tamper-proof installations
Variable-speed fan for low noise
1-dB detented gain controls for fast and accurate gain settings
Detachable Euro style input connectors
DIP switch control for clip limiters, high pass filters, bridge mono and parallel operation
Exclusive PowerLight switch-mode power supply technology for high performance and compact size
Selectable high-pass filters protect speakers and prevent speaker transformer saturation with minimal effect on program material (33 Hz or 75 Hz)
Comprehensive front panel indicators including signal, clip, protect and QSC's exclusive bridge mono and parallel input LEDs
Barrier strip output connector
Comprehensive protection circuitry including DC, infrasonic, thermal overload and short circuit protection
High-performance Class AB+B complementary bipolar output circuitry
Lightweight—all models only 21 pounds (9.5 kg) for easier racking and shipping
3-year warranty plus optional 3-year extended service contract
All CX Series amplifiers meet the European Union's, 2006 RoHS directive to restrict the use of hazardous materials used in electronic devices.

SPECIFICATIONS	CX204V	CX254	CX404
	POWER PER CHANNEL, STEREO MODE (all channels driven)
8?, 20 Hz–20 kHz 0.05% THD	-	170 W	250 W
4?, 20 Hz–20 kHz 0.05% THD	-	250 W	400 W*
2?, 1 kHz 1% THD	-	450 W	not recommended
70 V, 20 Hz–20 kHz 0.05% THD	200 W	-	-
70 V, 1 kHz 0.05% THD	220 W	-	-
70 V, 1 kHz 1% THD	300 W	-	-
	POWER, BRIDGED MONO MODE
16?, 20 Hz–20 kHz 0.1% THD	-	340 W	500 W
8?, 20 Hz–20 kHz 0.1% THD	-	500 W	800 W*
4?, 1 kHz 1% THD	-	900 W	not recommended
140 V, 20 Hz–20 kHz 0.1% THD	400 W	-	-
140 V, 1 kHz 0.05% THD	440 W	-	-
140 V, 1 kHz 1% THD	600 W	-	-
Noise, 20 Hz–20 kHz	>106 dB	>106 dB	>105 dB
Input Sensitivity	1.26 V rms	1.22 V rms	1.22 V rms
Maximum Voltage Gain	35 dB	29 dB	31 dB
Input Clipping	10 V rms (+22 dBu)	10 V rms (+22 dBu)	10 V rms (+22 dBu)
Output Circuitry Class	AB+B	AB+B	AB+B
Distortion (SMPTE-IM)	Less than 0.02%	Less than 0.01%	Less than 0.01%

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