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QSC CX404
4-Channel Powered Amplifier, 250W @ 8 ohms, CX-404 (CX254 shown)

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QSC CX404

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.

Power

  • 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
Transformer, Line, 70 Volt
QSC OT600A
Transformer, Line, 70 Volt

The OT-600 is a heavy-duty step-up autoformer accessory that adapts any power amplifier output with a maximum voltage of approximately 40 to 50 volts to drive a 70-volt distributed line with up to 600 watts. Three voltage taps let you ...

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Digital Signal Processor
QSC DSP3
Digital Signal Processor

After three decades of developing pioneering audio products and systems, QSC raises the bar once again, setting a new standard in signal processing with the new DSP-3 Digital Signal Processing Module.The DSP-3's two channels of independent ...

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Digital Signal Processing Module for QSC Amplifiers
QSC DSP4
Digital Signal Processing Module for QSC Amplifiers

With more than three decades of experience pioneering cutting edge audio products, QSC raises the bar once again with the DSP-4 Digital Signal Processing Module. This compact module offers two channels of independent DSP and attaches to ...

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Remote Rack Mounting Bracket for DSP-3 & DSP-4
QSC DPX4
Remote Rack Mounting Bracket for DSP-3 & DSP-4

The DPX-4 allows remote rack mounting of QSC DataPort-compatible accessory modules such as the DSP-3 and DSP-4 digital signal processors. The bracket allows accessory modules to be used in a standalone configuration with QSC four-channel, ...

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Low Frequency Filter for QSC Amplifiers
QSC LF3
Low Frequency Filter for QSC Amplifiers

The LF-3 Low-Frequency filter, when used with the XC-3 two-way crossover, provides the low-frequency crossover to create a three-way active system. The unit mounts to the rear panel of a two-channel DCA or CX amplifiers to save cost and ...

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Subwoofer Filter for QSC Amplifiers
QSC SF3
Subwoofer Filter for QSC Amplifiers

The SF-3 subwoofer filter allows the addition of subwoofers to an existing full-range system, offering adjustable low-pass filtering and high-pass subsonic filtering with optional B6 boost and mono-summing. The unit mounts to the rear ...

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5-band Stereo EQ for QSC Amplifiers
QSC SEQ2
5-band Stereo EQ for QSC Amplifiers

The SEQ-2 is an embedded accessory that provides two independent channels of graphic equalization. Five trimpots on each channel adjust boost and cut—up to ±12 dB—at 40 Hz, 160 Hz, 630 Hz, 2.5 kHz, and 10 kHz. Each band has a Q of ...

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TRANSFORMER 300W/70V
QSC OT300A
TRANSFORMER 300W/70V

The OT-300a is a heavy-duty step-up autoformer accessory that adapts any power amplifier output with a maximum voltage of approximately 17 to 35 volts to drive a 70-volt distributed line with up to 300 watts. Four voltage taps let you ...

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Input Isolation Transformer for QSC Amplifiers
QSC XF1
Input Isolation Transformer for QSC Amplifiers

The XF-1 is an internally mounted, high-quality, high-bandwidth input isolation transformer accessory for QSC amplifiers. Custom made for QSC by Jensen, it provides superb common-mode noise rejection for high-performance sound systems.The ...

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BusCard Signal Processing Accessory for QSC Amplifiers
QSC BSC7
BusCard Signal Processing Accessory for QSC Amplifiers

For 4-channel CX and DCA models. Accomodates two embedded signal processor cards- one for channels 1 and 2, and the other for channels 3 and 4- and up to four XF-1 Input Isolation Transformers.

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