QSC RMX 4050a Power Amplifier
Rely on this workhorse QSC amplifier to power your passive PA system. With the super-efficient RMX 4050a, you get 1400 watts per channel into 4 ohms.
QSC RMX 4050HD Power Amplifier
No longer available at zZounds
The "HD" is for heavy-duty! Part of QSC's super-dependable RMX series, the RMX4050HD delivers 800 watts per channel at 8 ohms, 4000 watts at 4 ohms bridged.
Overview
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 RMX4050HD is optimized to deliver high levels of sustained power, extraordinary audio performance, and road-proven reliability.
Like its smaller sibling (the RMX 1850HD), the QSC RMX 4050HD is 1 of 2 RMX "Heavy Duty" models designed to work as hard into 2-ohm loads as most competing amplifiers will at 4-ohms. With a 3-tier, Class H design, the RMX4050HD is extremely efficient at real world power levels. Less AC current is wasted and more goes into producing useful audio power. The QSC RMX 4050HD accomplishes all this with a standard 15-Amp plug.
Like all RMX amps, the QSC RMX 4050HD features balanced 1/4 in. 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.
The QSC RMX 4050HD provides improved thermal performance that gives you higher continuous power in 2-ohms stereo or 4-ohms bridged applications
- 3RU chassis only 16 in. deep
- Professional quality performance--incorporates road-proven QSC designs
- High-current toroidal transformers for greater 2-ohm power and low noise
- Independent… read more user-defeatable clip limiters reduce distortion
- Selectable low-frequency filters (30 Hz or 50 Hz) protect speakers and increase headroom
- Balanced 1/4 in. (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
- 3-year warranty read less
Like its smaller sibling (the RMX 1850HD), the QSC RMX 4050HD is 1 of 2 RMX "Heavy Duty" models designed to work as hard into 2-ohm loads as most competing amplifiers will at 4-ohms. With a 3-tier, Class H design, the RMX4050HD is extremely efficient at real world power levels. Less AC current is wasted and more goes into producing useful audio power. The QSC RMX 4050HD accomplishes all this with a standard 15-Amp plug.
Like all RMX amps, the QSC RMX 4050HD features balanced 1/4 in. 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.
The QSC RMX 4050HD provides improved thermal performance that gives you higher continuous power in 2-ohms stereo or 4-ohms bridged applications
Features:
- Dual mono, high current power supply for increased reliability and performance- 3RU chassis only 16 in. deep
- Professional quality performance--incorporates road-proven QSC designs
- High-current toroidal transformers for greater 2-ohm power and low noise
- Independent… read more user-defeatable clip limiters reduce distortion
- Selectable low-frequency filters (30 Hz or 50 Hz) protect speakers and increase headroom
- Balanced 1/4 in. (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
- 3-year warranty read less
Specs
Output Power Wattage:
Stereo Mode, Both Channels Driven Continuous, Per Channel:
8 ohms FTC 20 Hz-20 kHz 0.1% THD: 800 Watts
4 ohms FTC 20 Hz-20 kHz 0.1% THD: 1300 Watts
2 ohms FTC 20 Hz-20 kHz 0.1% THD: 1600 Watts
8 ohms EIC 1 kHz 0.1% THD: 850 Watts
4 ohms EIC 1 kHz 0.1% THD: 1400 Watts
2 ohms EIC 1 kHz 1% THD: 2000 Watts
Bridge-Mono Mode Operation:
8 ohms FTC 20 Hz-20 kHz 0.1% THD: 2600 Watts
8 ohms EIA 1 kHz 0.1% THD: 2800 Watts
4 ohms EIA 1 kHz 1% THD: 4000 Watts
Distortion (SMPTE-IM): Less than 0.02%
Distortion (Typical)
20 Hz-20 kHz: 10 dB below rated power: Less than 0.02% 4 ohm, less than 0.01% 8 ohms
1 kHz and below: full rated power: Less than 0.02% 4 ohm, less than 0.01% 8 ohms
Frequency Response:
20 Hz to 20 kHz, 8 ohms, LF filter bypassed, +0/-1 dB
5 Hz to 50 kHz, 8 ohms, LF filter bypassed, +0/-3 dB
Damping Factor: Greater than 250 @ 8 ohm
Noise (unweighted): 100 dB below rated output (20 Hz to 20 kHz, 8 ohm load)
Input Sensitivity: 1.25 Vrms for 800 watts into 8 ohms
Controls Front: AC power switch, Ch. 1 and Ch. 2 gain control
Controls Rear: 10-pole DIP switch featuring LF filter on/off, LF filter 30/50 Hz, Clip Limiter on/off controls for each channel and switches for selecting Stereo, Parallel, or Bridge mode. Push-button circuit breaker for each channel.
Voltage Gain: 64x (36 dB) for 8 ohm load
Input Impedance: 20 k ohm balanced, 10 k ohm unbalanced
Indicators:
Power-On: Green LED, Protect: Red LED
Signal -30dB: Yellow LED, Clip: Red LED
Connectors Input: XLR female, TRS (1/4 in.), and barrier-strip screw terminals, each channel
Connectors Output: Binding posts and Speakon outputs (Ch. 1 Speakon wired for biamp)
Cooling: Continuously variable-speed fan, rear-to-front air flow
Amplifier Protection: Short circuit, open circuit, thermal, ultrasonic, and RF protection. Stable into reactive or mismatched loads
Load Protection: On/off muting, DC fault output crowbar
Power Requirements: 100, 120 or 240 Volts AC (+/-10%) 50-60 Hz (factory configured)
Dimensions W x H x D: 19 x 5.25 x 15.9 in. (48.3 x 13.3 x 40.39 cm)
Weight: 68 lbs. (30.84 kg) net, 77 lbs. (34.43 kg) shipping
Note: Specifications subject to change without notice.
Note: Register your new product online with QSC and receive a Free 6-Year Extended Warranty upgrade (a $99 value).
Stereo Mode, Both Channels Driven Continuous, Per Channel:
8 ohms FTC 20 Hz-20 kHz 0.1% THD: 800 Watts
4 ohms FTC 20 Hz-20 kHz 0.1% THD: 1300 Watts
2 ohms FTC 20 Hz-20 kHz 0.1% THD: 1600 Watts
8 ohms EIC 1 kHz 0.1% THD: 850 Watts
4 ohms EIC 1 kHz 0.1% THD: 1400 Watts
2 ohms EIC 1 kHz 1% THD: 2000 Watts
Bridge-Mono Mode Operation:
8 ohms FTC 20 Hz-20 kHz 0.1% THD: 2600 Watts
8 ohms EIA 1 kHz 0.1% THD: 2800 Watts
4 ohms EIA 1 kHz 1% THD: 4000 Watts
Distortion (SMPTE-IM): Less than 0.02%
Distortion (Typical)
20 Hz-20 kHz: 10 dB below rated power: Less than 0.02% 4 ohm, less than 0.01% 8 ohms
1 kHz and below: full rated power: Less than 0.02% 4 ohm, less than 0.01% 8 ohms
Frequency Response:
20 Hz to 20 kHz, 8 ohms, LF filter bypassed, +0/-1 dB
5 Hz to 50 kHz, 8 ohms, LF filter bypassed, +0/-3 dB
Damping Factor: Greater than 250 @ 8 ohm
Noise (unweighted): 100 dB below rated output (20 Hz to 20 kHz, 8 ohm load)
Input Sensitivity: 1.25 Vrms for 800 watts into 8 ohms
Controls Front: AC power switch, Ch. 1 and Ch. 2 gain control
Controls Rear: 10-pole DIP switch featuring LF filter on/off, LF filter 30/50 Hz, Clip Limiter on/off controls for each channel and switches for selecting Stereo, Parallel, or Bridge mode. Push-button circuit breaker for each channel.
Voltage Gain: 64x (36 dB) for 8 ohm load
Input Impedance: 20 k ohm balanced, 10 k ohm unbalanced
Indicators:
Power-On: Green LED, Protect: Red LED
Signal -30dB: Yellow LED, Clip: Red LED
Connectors Input: XLR female, TRS (1/4 in.), and barrier-strip screw terminals, each channel
Connectors Output: Binding posts and Speakon outputs (Ch. 1 Speakon wired for biamp)
Cooling: Continuously variable-speed fan, rear-to-front air flow
Amplifier Protection: Short circuit, open circuit, thermal, ultrasonic, and RF protection. Stable into reactive or mismatched loads
Load Protection: On/off muting, DC fault output crowbar
Power Requirements: 100, 120 or 240 Volts AC (+/-10%) 50-60 Hz (factory configured)
Dimensions W x H x D: 19 x 5.25 x 15.9 in. (48.3 x 13.3 x 40.39 cm)
Weight: 68 lbs. (30.84 kg) net, 77 lbs. (34.43 kg) shipping
Note: Specifications subject to change without notice.
Note: Register your new product online with QSC and receive a Free 6-Year Extended Warranty upgrade (a $99 value).
Documents and Manuals
For support or warranty questions, please contact the manufacturer:
Phone: 800-772-2834
Web: http://qsc.com/support
Phone: 800-772-2834
Web: http://qsc.com/support
Reviews
Reviewers gave this product an overall rating of 4 out of 5 stars.
(32 ratings)
by a customer from aol.com
"Worth every penny--affordable and efficient"
Verified Customer
zZounds has verified that this reviewer made a purchase from us.
hopefully we will keep these amps until we wear them out.We compared this product to Crown Amps(probably not a real fair assesment), but dollar for dollar we feel this product served our needs and was an affordable alternative. The fans are a little noisy, but tolerable.
Sound
Sound quality is good. We only use this product live. We use 4 of these amps with 16 JBL SR4726 speaker cabinets (four per amp @ 4Ohms) and the sound quality is superb. Give them plenty of electric and don't over drive the system. Any Amplifier will reproduce the sound efficiently if the system is set up properly. Don't ask it to do more than it is capable of doing. Our Crown power Amps seem to work much better on the low end though.
Features
Turn it on and forget about it!
Quality
So far--so good. We've used four of them fot the last 6 months and had NO problems.
Value
Good value for the money
Manufacturer Support
dont know
The Wow Factor
This product met our particular needs in the price range and was suitable for the type of music that we play.
Musical Style:
50-60-70-show band
28 of 29 people (97%) people found this review helpful. Did you?
Thanks for your opinion!
No longer available at zZounds
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