• Deal Alerts!
  • |
  • Request a Catalog
  • |
  • Currency
    • Choose a currency
  • |
  • En Español
  • 0
    • Quantity
      Your Cart Is Empty.
We have a secret…
Only our emailed subscribers have access to Exclusive Deals, Giveaways, Sales & More!
U.S. Power Requirements & Currency Exchange Rates Accept
U.S. Power / Voltage

By completing your order, you understand that the products(s) you are purchasing are U.S. models and may have power / voltage requirements different from that of your country.

Currency Exchange Rates

Prices shown in currencies other than US Dollars are estimates based on current exchange rates. We will charge your credit card in US Dollars on the day your order is shipped, and the conversion to your local currency will be done at the prevailing rate by your credit card issuer.

ProSound And Stage Lighting will not mark your parcel as a “gift”, declare a value lower than the actual price paid, or otherwise prepare false customs information.

QSC RMX4050HD Power Amplifier

This Product Has Been Discontinued.
See Other Power Amps by QSC
See All Products by QSC
RMX 4050HD Power Amplifier: Serious Power For A Serious Performance

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 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 RMX 4050HD accomplishes 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 Speakon outputs, front-mounted gain controls, plus signal and clip LED indicators to monitor performance.

  • Stereo Mode Power Rating: 8 ohms: 800 watts, 4 ohms: 1300 watts, 2 ohms: 1600 watts
  • Bridged Mono Power Rating: 8 ohms: 2600 watts, 4 ohms: 4000 watts
  • 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
  • Three rack space chassis only 16" deep
  • Professional quality performance--incorporates road-proven QSC designs
  • High-current toroidal transformers for greater two-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
  • Frequency response: 20Hz to 20kHz, 8 ohms, LF filter bypassed, +0/-1dB
  • 5Hz to 50kHz, 8 ohms, LF filter bypassed, +0/-3dB
  • Damping factor: greater than 250 @ 8 ohm
  • Noise (unweighted): 100dB below rated output (20Hz to 20kHz, 8 ohm load)
  • Input Sensitivity: 1.25 Vrms for 800 watts into 8 ohms
  • Cooling: continuously variable-speed fan, rear-to-front air flow
  • 3-year warranty; optional 3-year extended service contract is available
  • Size: 19"w x 5.25"h x 15.9"d. Wt. 68 lbs.

Return Policy – Click for details

Share the savings! Tell your friends and family about the great savings on this and thousands of quality products.
Note: You and your friend's email addresses are only used once as a referral. We will not collect or store the email addresses.
Your Name:
Your Email:
Friend's Name:
Friend's Email:
500 character max


by PowerReviews
QSC RMX4050HD Power Amplifier

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to top

(1 of 5 customers found this review helpful)


over rated

By dj luke

from mingo jct oh

About Me Audiophile, Pro Audio / DJ


  • Easy Setup
  • Energy Efficient


  • Lack Of Power
  • Poor Sound Quality

Best Uses

  • Basic Systems
  • DJ / Mixing
  • Smaller Rooms

Comments about QSC RMX4050HD Power Amplifier:

I bought a couple of these amp i thought they would work on subs they just have what I like in a sub amp they have no head room and they have no guts on low end

  • Was this a gift?:
  • No

Displaying review 1

Back to top

Do you have questions about this product?

get answers from real customers and in-house experts with AnswerBox.

3 Questions | 3 Answers
Displaying questions 1-3
  • Q:

    Are the reviews on this product just a hit and miss thing? I would like to purchase this amp to power 4 Cerwin Vega EL-36B, is this amp the right amp?
    Asked on 3/26/2012 by Lenny from Donna, TX

    1 answer

    • Staff Reviewer


      One QSC RMX4050 is not powerful enough to push 4 of those cerwin vega speakers. I would buy two of the RMX4050s and power two speakers per amp for optimal performance. If you have any more questions feel free to give us a call. 800-945-9300.

      Answered on 4/4/2012 by Garrett from Cypress, CA
  • Q:

    Can I use the 220 power voltage input for this amp?
    Asked on 12/23/2011 by Nene from Ghana

    1 answer

    • Staff Reviewer


      Nope, only 120 voltage.

      Answered on 12/23/2011 by DJ Menergy from Cypress, CA
  • Q:

    hi!just want to know if this item is been fixed or just the customer returned it.thanks
    Asked on 7/26/2010 by hyper from Guam

    1 answer

    • Staff Reviewer


      It was a return.

      Answered on 7/27/2010 by Jake from Cypress, CA
Displaying questions 1-3

Do you have a question about this product? 

Deal Alerts!