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QSC RMX4050a Power Amplifier

Model: QSC RMX4050a

QSC RMX4050a Power Amplifier
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  • Not in-Stock: Estimated Lead Time 2-3 Days 
  • (1 review)

About: QSC RMX4050a Power Amplifier

The RMXa Series amplifiers offer true professional-quality performance at an affordable price. With 1400 W/CH into 4 ohms and 2000 W/CH into 2 ohms all in a chassis that is less than 16" deep the RMX4050a is perfectly suited for performing musicians and mobile entertainers.


  • Professional quality performance—incorporates road-proven QSC designs
  • The 4000 watt RMX 4050a operates on a standard 15 amp plug (120V)
  • Both the RMX 4050a and RMX 5050a feature a dual mono, high-current power supply for increased reliability and performance
  • The RMX 4050a provides improved thermal performance yielding higher continuous power in 2 ohm stereo or 4 ohm bridged applications.
  • Compact size — up to 2500 watts in 2 rack spaces or 5000 watts in 3 rack spaces
  • 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
  • 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 channel automatically protects amplifier and speakers
  • 3-year warranty plus optional 3-year extended service contract

UPC: 684284062864 is a Canadian authorized QSC retailer.

Reviews: QSC RMX4050a Power Amplifier

Landon S. - 07/27/2014

-Good sound with clean power at high volumes.
-Very well built
-The notched gain controls QSC added to this newer RMXA series.
-Quiet fan, unit runs cool.
-The weight, you can tell just by picking it up, that it is a honest, powerful amp.

None that I can think of...Although, it would be nice if it came with some handles on the front. QSC used to sell a handle kit for RMX amps I Believe. Cannot find it anymore.

Simply the best sounding, most well built amplifier I've come across. Made by the only brand that makes amplifiers worth powering speakers with. It Runs my Cerwin Vega! XLS-215s in a serious home soundsystem with some power to spare and everything sounds great. I decided to buy it after using an RMX-1450 for 6 years every single day and it has proven itself by working flawlessly.. The RMX series is made to last. And QSCs new RMXA series seems to be just as well built, if not more.

Bottom Line:
Yes, I would recommend this to a friend

Warranty: QSC RMX4050a Power Amplifier Warranty:

30 Days

Manufacturer's Warranty:

  • Amplifiers and Speakers: 3-year limited
  • Mixers and CP Series speakers: 1-year limited
  • RMXa, CMXa, PLX2, GX, GXD, K, KW, K.2 and KS: 3-year limited + additional 3 years of warranty upon registration on the QSC website for a total of 6 years limited warranty**
  • TouchMix-8, TouchMix-16, TouchMix-30 Pro: 1-year limited + additional 2 years of warranty upon registration on the QSC website for a total of 3 years limited warranty**
  • CP8 and CP12: 1-year limited + additional 5 years of warranty upon registration on the QSC website for a total of 6 years limited warranty**
  • Accessories: 90 days limited

**Registration on QSC website must be completed within 30 days of purchase**