QSC CMX2000Va Contractor power amplifier/ 2 channel, 1100 watts/ch at 8ohms, 2000 watts/ch at 4ohms, 70V/mono at 1000 Watts.

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The New CMXa Series is an economical and rugged power amplifier designed to meet the needs of system integrators. It is 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


Stereo Mode (both channels driven)

8Ω FTC 0.1% THD
8Ω EIA 0.1% THD
4Ω FTC 0.1% THD
4Ω EIA 0.5% THD

70V Direct EIA 1% THD
100V Direct EIA 1% THD

FTC: 20 Hz–20 kHz after preconditioning
EIA: 1 kHz
450 W
500 W
650 W
800 W
1200 W

400 W

Bridge Mono Mode
8Ω FTC, 0.1% THD
8Ω EIA, 0.1% THD
4Ω EIA, 1% THD

70V Direct Drive EIA, 1% THD
100V Direct Drive EIA, 1% THD

FTC: 20 Hz–20 kHz after preconditioning; both channels driven simultaneously
EIA: 1 kHz
1300 W
1500 W
2400 W

2000 W
2300 W

Signal to Noise (20 Hz–20 kHz, 8Ω) > 100 dB
Input Sensitivity into 8Ω 1.23 V (+4.0 dBu)
Max Voltage Gain 46× (33 dB)
Output Circuitry 2-tier Class H
Current Draw (pink noise program)
Typical, 1/8 power 4Ω, 120 V
Typical, 1/8 power 4Ω, 230 V
Severe, 1/3 power 4Ω, 120 V
Severe, 1/3 power 4Ω, 230 V

6.3 A
3.2 A
15.6 A
7.8 A
Distortion (SMPTE-IM) < 0.01%
Distortion (typical)
20 Hz–20 kHz: 10 dB below rated power
1.0 kHz and below: full rated power

< 0.03% THD / 4Ω and 8Ω
< 0.03% THD / 4Ω and 8Ω
Frequency Response 20 Hz–20 kHz: ±1 dB; -3 dB points: 5 Hz and 50 kHz
Damping Factor (1 kHz and below) > 300 at 8Ω
Input Impedance 10 kΩ unbalanced, 20 kΩ balanced
Input Clipping 10 V rms (+22 dBu)
Cooling Continuously variable-speed fan, rear-to-front air flow
Connectors (each channel) Input: Active balanced; barrier strip, XLR and ¼" (6.3 mm) – TRS tip and XLR pin 2 positive
Output: Detachable terminal block and Neutrik™ Speakon™
Controls Front: AC switch, Channels 1 & 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 loads
Load Protection On/off muting, AC coupling (CMX 300Va and CMX 500Va), triac crowbar (CMX 800Va and CMX 2000Va on each channel)
Power Requirements 120 or 230 VAC, 50 – 60 Hz
Dimensions (HWD)
2 RU models

3 RU model (CMX 2000Va)

3.5" (8.9 cm) 2 rack spaces x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep to rear support ears
5.25" (13.3 cm) 3 rack spaces x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep to rear support ears
Weight - Net 44.5 lb (20.2 kg)


  • “Flex-Use” loading options allows CMX Series amps to drive low-impedance loads down to 2 ohms, and certain models can direct-drive (no output transformer) 70V and 100V distributed loudspeaker systems
  • “Flex-Use” input connectivity choices including actively balanced barrier strip, XLR, or ¼" TRS
  • “Flex-Use” output connectivity choices include NL4 Speakon™ and detachable terminal block
  • Rack mountable with chassis less than 16" (40.6 mm) deep
  • 1-dB recessed, detented gain controls for fast, accurate, and repeatable settings
  • Tamper-proof security cover for gain controls
  • Recessed rear DIP switches for easy selection of stereo, parallel, or bridged mode operation, and enabling/disabling low-frequency filter protection
  • Low-noise variable-speed fans with rear-to-front airflow help keep amplifiers and racks cool
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