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QSC RMX4050HD Power Amplifier

Item: QSRMX4050HD

Brand new, factory sealed, eligible for a 6 year QSC warranty (with product registration at QSC web site).

QSC's RMX 4050HD power amplifier represents the state-of-the-art in professional quality performance at an affordable price. Perfectly suited for a wide range of sound reinforcement applications including professional touring, performing musicians, and mobile DJs, the RMX 4050HD is optimized to deliver high levels of sustained power, extraordinary audio performance, and road-proven reliability.

Like its smaller sibling (the RMX 1850HD), the RMX 4050HD is one of two RMX "Heavy Duty" models designed to work as hard into 2 ohm loads as most competing amplifiers will at 4 ohms. With a three-tier, Class H design, the RMX 4050HD is extremely efficient at real world power levels. Less AC current is wasted and more goes into producing useful audio power. The 120 volt versions of the RMX 4050HD accomplish all this with a standard 15 amp plug.

Like all RMX amps, the RMX 4050HD features balanced 1/4" TRS, XLR and barrier strip inputs, binding posts and Neutrik SpeakonĀ® outputs, front-mounted gain controls, plus signal and clip LED indicators to monitor performance.

QSC RMX4050HD Power Amplifier Features:

  • The RMX 4050HD provides improved thermal performance that gives you higher continuous power in 2 ohms stereo or 4 ohms bridged applications
  • Dual mono, high current power supply for increased reliability and performance
  • 3RU chassis only 16" deep
  • Professional quality performance - incorporates road-proven QSC designs
  • High-current toroidal transformers for greater 2 ohm power and low noise
  • Independent user-defeatable clip limiters reduce distortion
  • Selectable low frequency filters (30 Hz or 50 Hz) protect speakers and increase headroom
  • Balanced 1/4" (6.3 mm) TRS, XLR and barrier strip inputs
  • Binding post and Neutrik Speakon outputs
  • Front mounted gain controls for easy access
  • Signal and Clip LED indicators to monitor performance
  • Six year warranty (with product registration at mfr. website)


  • STEREO MODE (Both Channels Driven):
    8 ohms
    (FTC 20 Hz - 20 kHz, 0.1% THD): 800 W
    (EIA 1 kHz, 0.1% THD):  850 W
    4 ohms
    (FTC 20 Hz - 20 kHz, 0.1% THD): 1300 W
    (EIA 1 kHz, 0.1% THD):  1400 W
    2 ohms
    (FTC 20 Hz - 20 kHz, 0.1% THD): 1600 W
    (EIA 1 kHz, 1% THD):  2000 W 
    8 ohms
    (FTC 20 Hz - 20 kHz, 0.1% THD): 2600 W(EIA 1 kHz, 0.1% THD):  2800 W
    4 ohms
    (EIA 1 kHz, 1% THD):  4000 W
  • Signal to Noise, 20 Hz-20 kHz:   -100 dB
  • Distortion (SMPTE-IM):   Less than 0.02%
  • Damping Factor     Greater than 250
  • Weight:    68 lbs (30.84 kg)

List price: $1,700.00

Price: $1,499.99

You Save: $200.01 (12%)

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QSRMX4050HD - RMX4050HD Power Amplifier
Price $1,499.99

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