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QSC CX204V CX Series 4-Channel 70V Power Amplifier
Part # CX204V
Model # CX204V

The QSC CX204V is a 4-channel CX power amplifier, CX Series is the perfect solution to any permanently installed sound system.

Availability: In Stock and Ready to Ship!



The QSC CX204V is a 4-channel CX amplifiers give you four channels in only two rack spaces-without compromising on power. Choose from three models - a direct 70-volt model and two low impedance versions, each equipped with our exclusive PowerLight switching power supply technology to virtually eliminate noise and hum. With high output power, versatile loading options, high thermal capacity and unmatched reliability, the CX Series is the perfect solution to any permanently installed sound system.

With PowerLight technology, CX amplifiers take your sound to a whole new level. Not only does it give you tighter bass and clean transparent highs, PowerLight also cuts waste heat, boosts reliability and gets rid of unwanted noise and hum. PowerLight is a revolutionary switching power supply technology that provides ample current to the audio power circuitry by charging the supply rails 230,000 times a second through an ultra-low impedance circuit. So unlike amplifiers that use conventional supplies, the audio signal is never starved prematurely and remains crisp and clean.



  • 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 (50 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
Stereo Mode, Both Channels Driven
70V 20 Hz-20 kHz 0.05% THD 200W
70V 1 kHz 0.05% THD 220W
70V 1 kHz 1% THD 300W
140V 20 Hz-20 kHz 0.1% THD 400W
140V 1 kHz 0.05% THD 440W
140V 1 kHz 1% THD 600W
Noise, 20Hz-20kHz <-105 dB
Input Sensitivity 1.26Vrms
Gain (for full-rated output power) 35 dB @ 70.7V
Input Clipping 10 Vrms (+22 dB)
Output Circuitry AB+B
Distortion (SMPTE-IM) Less than 0.02%
Distortion (Typical)
20 Hz-20 kHz: 10 dB Below Rated Power Less than 0.01% THD
1.0 kHz and Below: Full Rated Power Less than 0.01% THD
Frequency Response (Typical) 20 Hz-20 kHz, ± 0.2 dB 8 Hz-50 kHz, +0/-3 dB
Damping Factor Greater than 500 (1 kHz and below)
Input Impedance 6k ohms unbalanced, 12k ohms balanced
Cooling Variable speed fan zero-idle, rear to front airflow through tunnel heat sink
Connectors, Each Channel INP: 3 position Euro-style detachable barrier block, DataPort: HD-15, OUT: 6-position barrier strip
Load Protection On/off muting, DC-fault power supply protection
Controls Front: AC switch, Rear: DIP switch, clip limiter on/off, LF filter on/off, LF filter freq select
Power Requirements 100, 120, 230 Vac, 50-60 Hz
Dimensions (H x W x D) 3.5" (8.9 cm) x 19" (48.3 cm) x 14" (35.6 cm)
Net Weight 21 lbs (9.5 kg)
Shipping Weight 27 lbs (12.3 kg)

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