QSC CX404 4 Channels, 250 watts per ch at 8 ohms, 400 watts per channel at 4 ohm

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4 Channels, 250 watts per channel at 8 ohms, 400 watts per channel at 4 ohms


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The new 4-channel CX amplifiers give you four channels in only two rack spaces - without compromising on power. 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 PowerWave technology, CX amplifiers take your sound to a whole new level. Not only does it give you tighter bass and clean transparent highs, PowerWave also cuts waste heat, boosts reliability and gets rid of unwanted noise and hum. PowerWave 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.


  • 8 ohms, Stereo Mode, Both Channels Driven: 250W
  • 4 ohms, Stereo Mode, Both Channels Driven: 400W
  • 2 ohms, Stereo Mode, Both Channels Driven: notrecommended
  • 16 ohms, Bridged Mono Mode: 500W
  • 8 ohms, Bridged Mono Mode: 800W
  • 4 ohms, Bridged Mono Mode: not recommended

CX404 Specifications

  • Input Impedance: 6k ohms unbalanced, 12k ohmsbalanced
  • Input Connectors, each channel: 3 position Euro-styledetachable barrier block, Ch 1, 2, 3 & 4
  • DataPort: HD-15 Connector, Ch 1+2, 3+4
  • Output Connectors, each channel: Six-position barrierstrip with monitor connections, Ch 1+2, Ch 3+4
  • Amplifier Protection: Full short circuit, opencircuit, thermal, ultrasonic, and RF protection. Stable into reactive ormismatched loads
  • Load Protection: On/Off muting, DC-fault power supplyshutdown
  • Dimensions (W x H x D): 19" x 3.5" x 14" (2 RU)
  • Weight: 21 lbs net, 27 lbs shipping

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