RMX Series 1400W-Channel @ 4 Ohms Stereo Power Amplifier


Our Price: $1,499.99
List Price: $1,539.99
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The RMX4050A is a 1400W-Channel @ 4 Ohms stereo power amplifier.

The RMXa Series amplifiers from QSC offer true professional-quality performance at an affordable price. Three 2-rackspace models range in power from 430 to 1200 watts per channel at 2 ohms. Two 3-rackspace models provide 2000 to 2500 watts per channel at 2 ohms. All five models feature a compact chassis less than 16" deep. RMXa amplifiers include a comprehensive set of features including XLR and 1/4" balanced inputs, Speakon® and binding post outposts for convenient connectivity. User-defeatable clip limiters and selectable low-frequency filters optimize sonic performance.

The RMX 4050a is a “heavy duty” model designed to work as hard into 2 ohm loads as most competing amplifiers will at 4 ohms.

Both the RMX 5050a and RMX 4050a feature a three-tier, Class H design that is extremely efficient at real world power levels. Less AC current is wasted and more available current goes into producing useful audio power. 120 volt versions of the RMX4050a accomplish all this with a standard 15 amp plug.


  • High-current toroidal transformers for greater 2 Ohmpower and low noise
  • Independent user-defeatable clip limiters reducedistortion
  • Selectable low-frequency filters (30 Hz or 50 Hz)protect speakers and increase headroom
  • Balanced 1/4" (6.3 mm) TRS, XLR, and barrier stripinputs
  • Touch-proof binding post and Neutrik Speakon® outputs
  • Front mounted gain controls for easy access
  • Signal and Clip LED indicators to monitor performance
  • Independent DC and thermal overload protection on each channelautomatically protects amplifier and speakers


  • Stereo Mode (both channels driven)
    8 Ohms / FTC 20 Hz – 20 kHz /0.1% THD: 800W
    8 Ohms / EIA 1 kHz / 0.1% THD: 850W
    4 Ohms / FTC 20Hz – 20 kHz / 0.1% THD: 1300W
    4 Ohms / EIA 1 kHz / 0.1% THD: 1400W
    2 Ohms / FTC 20 Hz – 20 kHz / 1% THD: 1600W
    2 Ohms / EIA 1 kHz / 1% THD: 2000W
  • Bridge-Mono Mode
    8 Ohms / FTC 20 Hz – 20 kHz / 0.1% THD: 2600W
    8Ohms / EIA 1 kHz / 0.1% THD: 2800W
    4 Ohms / EIA 1 kHz / 1% THD: 4000W
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