The QSC CMX500VA is a 500W @ 4 Ω stereo power amplifier. The CMXa series is an economical and rugged power amplifier designed to meet the needs of system integrators, based upon the proven, rock-solid, reliable performance found in the award winning RMX Series. The CMXa feature sets are designed for wide-ranging application in facilities such as performance halls, houses of worship, sports clubs, gymnasiums, dance venues, pubs, and FGM/BGM systems. The CMXa Series provides unmatched performance, the right power for the job and an affordable price point. CMXa amplifiers incorporate everything QSC has learned in more than forty years of striving to deliver worry-free operations without failures. The design of these amplifiers starts with QSC's world-class power supplies. The CMXa uses a powerful, high-current toroidal transformer and filtering to ensure generous energy reserves. This allows the amplifiers to effortlessly handle high-level transients, even when driving abusive 2-ohm speaker loads. All CMXa amplifiers are protected from damage from shorted outputs. Automatic current limiting protects the amplifier from damage until the short is corrected. CMXa amplifiers also feature DC protection systems to prevent loudspeaker damage in the unlikely event of an output transistor failure. DC voltage from the power supply is never passed directly to your speakers, even in the event of an output circuit failure. The CMXa amplifiers deliver true and accurate studio-quality sound. A full complementary output circuit using high-grade linear output devices generates accurate, flat-frequency response with low distortion. SMT (Surface Mount Technology) triples small-signal component density, enabling high power output in a 2 rack unit chassis (3 U for the CMX 2000Va). Unlike other designs, CMXa output devices are directly mounted to the heat sink for optimum thermal coupling and cooling. The V in the model name designates the ability to directly drive 70-volt and/or 100-volt distributed loudspeakers. The CMX 500Va must be configured for bridged-mono operation in order to directly drive high-impedance systems For installations requiring a transformer-isolated output, the CMX has optional accessories to cover your needs.
Features- Flex-Use loading options allow low-impedance loads down to 2 Ω
- Flex-Use input connectivity choices
- 500W @ 4 Ω, 1400W @ 4 Ω bridged, 1200W/600W 70V/100V direct drive
- 1 dB recessed, detented gain controls
- Recessed DIP switches for easy selection of stereo, parallel, or bridged mode operation
- Stereo Mode (both channels driven):
- 8 Ω / FTC 20 Hz – 20 kHz / 0.1% THD: 260W
- 8 Ω / EIA 1 kHz / 0.1% THD: 300W
- 4 Ω / FTC 20 Hz – 20 kHz / 0.1% THD: 400W
- 4 Ω / EIA 1 kHz / 0.5% THD: 500W (1% THD)
- 2 Ω / EIA 1 kHz / 1% THD: 700W
- Bridge Mono Mode:
- 8 Ω / FTC 20 Hz – 20 kHz / 0.1% THD: 800W
- 8 Ω / EIA 1 kHz / 0.1% THD: 900W
- 4 Ω / EIA 1 kHz / 1% THD: 1400W
- 70 V Direct Drive / EIA 1 kHz / 1% THD: 1200W
- 100 V Direct Drive / EIA 1 kHz / 1% THD: 600W
- Frequency Response: 20 Hz – 20 kHz: ±1 dB -3 dB points: 5 Hz – 50 kHz
- Damping Factor (1 kHz and below): > 300 at 8 Ω
- Input Impedance: 10 kΩ unbalanced, 20 kΩ balanced
- Input Clipping: 10 Vrms (+22 dB)
- Cooling: Continuously variable-speed fan,rear-to-front air flow
- Connectors (each channel):
- Input: Active balanced; barrier strip, XLR and 1/4" (6.3 mm) – TRS tip and XLR pin 2 positive
- Output: Detachable terminal block and Neutrik™ speakON™
- Controls:
- Front: AC switch, Ch. 1 and 2 gain knobs
- Rear: 10-position DIP switch
- Indicators: Power-on: Green LED / Signal: Green LED (1 per channel) / Clip: Red LED (1 per channel)
- Amplifier Protection: Stable into reactive or mismatched load
- Load Protection: On/off muting, AC coupling (CMX300Va and CMX500Va), triac crowbar (CMX800Va and CMX2000Va on each channel)
- Power Requirements: 120 and 230 VAC, 50 – 60 Hz
- Dimensions (H x W x D): 3.5" x 19" x 15.9"
- Weight: 40 lbs.
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