QSC CX502 2-Channel Power Amp


Incorporating PowerLight technology, the CX502 is a low impedance power amp ranging in power from 500 watts stereo @ 8 ohms to 1600 watts bridged at 4 ohms. It is designed to meet the specialized needs of sound contractors. With high output power, versatile loading options, high thermal capacity and reliability, the CX Series is the ideal solution to any permanently installed sound system.

Comes equipped with many contractor-specific features including 1 dB detented gain controls for easily repeatable settings and a custom security cover for tamper-proof installations. Active in-rush limiting eliminates AC in-rush current, cutting the need for power sequencers. Also includes an HD15 Data Port connector to interface with QSControl, QSC's computer-controlled audio system that allows remote amplifier monitoring and control via a standard Ethernet network.

Other Features:

  • Variable speed fan for low noise
  • XLR and detachable Euro-style input connectors
  • Dip switch control for clip limiters, high pass filters, bridge mono and parallel operation
  • 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
  • Only 2 RU high and 14" deep for reduced rack cost and floor space
  • Weighs only 21 lbs. (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):
  • 8 ohms (20Hz-20kHz, 0.05% THD): 300W
  • 4 ohms (20Hz-20kHz, 0.05% THD): 500W
  • 2 ohms (1 kHz, 1% THD): 800 W
  • Bridged Mono Mode:
  • 16 ohms (20Hz-20kHz, 0.05% THD): 600W
  • 8 ohms (20Hz-20kHz, 0.05% THD): 1100W
  • 4 ohms (1 kHz, 1% THD): 1600W
  • Noise (20Hz-20kHz): >-107 dB
  • Input Sensitivity (@ 8 ohms): 1.23 Vrms
  • Voltage Gain (@ 8 ohms): 32 dB
  • Output Circuitry: AB+B
  • Distortion (SMPTE-IM): Less than 0.02%
  • Distortion (Typical):
  • 20Hz-20kHz: 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: 20Hz-20kHz, +/- 0.2 dB
  • Damping Factor: Greater than 500
  • Input Impedance: 6k ohms unbalanced, 12k ohms balanced
  • Input Clipping: 10 Vrms (+22 dB)
  • Cooling: Variable-speed fan, rear-to-front air flow
  • Connectors, each channel: Input: 3-pin XLR & 3-pin detachable terminal blocks (1 each per channel)
  • Amplifier Protection: Full short circuit, open circuit, thermal, unltrasonic, and RF protection. Stable into reactive or mismatched loads.
  • Load Protection: On/Off muting, DC-fault power supply shutdown
  • Dimensions: 19" W x 3.5" (2 RU) H x 14" D (48.3 x 8.9 x 14 cm)
  • (Depth measured from front mounting rails)
  • Net Weight: 21 lbs. (9.5 kg)
  • Shipping Weight: 27 lbs. (12.3 kg)

  • Add to Cart:

    • Model: CX502
    • Manufactured by: QSC

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    Most users do not need a license to operate a wireless microphone system. Nevertheless, operating a microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888- CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s wireless microphone website at www.fcc.gov/cgb/wirelessmicrophones.