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QSC RMX 4050HD 2-Channel Stereo Power Amplifier (800W/Channel @ 8 Ohms)

BH #QSRMX4050HD • MFR #RMX4050HD
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QSC RMX 4050HD 2-Channel Stereo Power Amplifier (800W/Channel @ 8 Ohms)
Key Features
  • 3RU Design
  • Stereo and Bridge Modes
  • XLR, 1/4", and Barrier Strip Inputs
  • Speakon and Barrier Strip Outputs
The QSC RMX 4050HD is a professional, moderately priced stereo power amplifier housed in a sturdy 3 RU rackmountable chassis, offering 800 Watts of output power at 8 Ohms, and over 4000 Watts at 4 Ohms bridged. This model is uniquely equipped with an improved thermal protection design that allows for higher continuous power, and therefore better output performance, at 2-Ohm stereo and 4-Ohm bridged applications.

The RMX 4050HD also offers independent and defeatable clip limiters, and efficient power reserves created by a high current toroidal transformer, resulting in improved and consistent high level transient response. The XLR , 1/4" TRS, and barrier strip connectors cover the standard input requirements, and the selectable 30 Hz and 50 Hz low frequency filters offer additional speaker protection and increased headroom. The outputs are on either barrier strips or the ever popular Speakon connectors.

The RMX 4050HD is packed with design features that contribute toward an excellent value for the budget-conscious but picky professional, and QSC is comfortable recommending the RMX series for studio monitoring or live sound system applications.

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QSC RMX-4050HD Overview

The QSC RMX 4050HD is a professional, moderately priced stereo power amplifier housed in a sturdy 3 RU rackmountable chassis, offering 800 Watts of output power at 8 Ohms, and over 4000 Watts at 4 Ohms bridged. This model is uniquely equipped with an improved thermal protection design that allows for higher continuous power, and therefore better output performance, at 2-Ohm stereo and 4-Ohm bridged applications.

The RMX 4050HD also offers independent and defeatable clip limiters, and efficient power reserves created by a high current toroidal transformer, resulting in improved and consistent high level transient response. The XLR , 1/4" TRS, and barrier strip connectors cover the standard input requirements, and the selectable 30 Hz and 50 Hz low frequency filters offer additional speaker protection and increased headroom. The outputs are on either barrier strips or the ever popular Speakon connectors.

The RMX 4050HD is packed with design features that contribute toward an excellent value for the budget-conscious but picky professional, and QSC is comfortable recommending the RMX series for studio monitoring or live sound system applications.

Rackmountable power amplifier with unique, advanced thermal protection; higher continuous power output at 2 Ohms Stereo and 4 Ohms Bridge-Mono applications
High-current toroidal transformer and filter capacitance for ensured energy reserves, improved high level transient response across variety of speaker loads
Output device direct-mounted to heat sink for optimum thermal coupling, cooling
4000 Watts maximum power output bridged mono
Independent defeatable clip limiters reduce distortion without affecting peak performance, response
Selectable low-frequency filters boost system response, protect speakers; match amplifier's range to speakers for tighter LF response
Low-noise variable speed fans with rear-to-front air flow, keep amplifiers and racks cooler
Independent DC and thermal overload protection on each channel automatically protects amplifier and speakers

QSC RMX-4050HD Specs

Power Rating
Rating @ 1 kHz, THD=0.1%
1400W @ 4Ω Stereo (per channel)
850W @ 8Ω Stereo (per channel)
2000W @ 2Ω Stereo (per channel)
2800W @ 8Ω Bridged-Mono
4000W @ 4Ω Bridged-Mono

Rating @ 20 Hz - 20 kHz, THD=0.05%
1600W @ 2Ω Stereo (per channel)
1300W @ 4Ω Stereo (per channel)
800W @ 8Ω Stereo (per channel)
2600W @ 8Ω Bridged-Mono
Damping Factor
>250 (@8 Ohms)
Input Sensitivity
1.25 Vrms for 800W @8 Ohms
Input Impedance
20 kOhms, balanced
10 kOhms, unbalanced
Gain
36dB
Frequency Response
20 Hz - 20 kHz, +/- 1dB (LF filter bypassed)
5 Hz - 50 kHz, +0/-3dB (LF filter bypassed)
Signal-to-Noise Ratio
100dB (20 Hz - 20 kHz, 8 Ohm load)
Total Harmonic Distortion (THD)
<0.02%
Input Connections
2 x XLR female, balanced
2 x 1/4" TRS phone, balanced
2 x barrier strips
Output Connectors
2 x pair 5-way binding posts
2 x NL-4 Speakon
Controls Front Panel
2 x rotary Level Control knobs
1 x Power switch
Controls (Rear)
1 x Bridge/Stereo/Parallel Input Config. Switch
1 x Clip/Limiter switch
2 x Top 100 Hz HPF/Full/Sub 100 Hz LPF Filter switches
2 x 33 Hz HPF/Full (infrasonic) Filter switches
2 x Circuit Breaker switches
Indicators
1 x green Power On LED
2 x yellow Signal LEDs
2 x red Clip LEDs
Cooling
1 x variable-speed fan (back-to-front airflow)
Power Consumption
7 Amps (1/8 power pink noise @4 Ohms)
Power Requirements
100-120VAC, 60Hz
Dimensions
19 x 5.25 x 15.9" (483 x 89 x 404mm); 2U
Weight
68 lbs (30.84 kg)
Specialties
Detented Level Attenuators
Comprehensive Protection Circuitry
On/Off Muting, DC-fault Power Supply Shutdown
Packaging Info
Box Dimensions (LxWxH)
23.8 x 21.8 x 8.1"

QSC RMX-4050HD Reviews

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