QSC RMX4050HD Power Amplifier
800 watts per channel at 8 ohms in stereo mode. Capable of 2-ohm operation.
Product rated 6.4 out of 10 (17 ratings)
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ADDITIONAL VIEWS:
Main
Alternate
RMX Series
Rear
PRODUCT DESCRIPTION
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 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 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 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 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 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
Like its smaller sibling (the RMX 1850HD), the 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 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 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 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 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
TECHNICAL DESCRIPTION
Stereo Mode, Both Channels Driven Continuous: Average Output Power 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 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.
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 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.
CATALOG DESCRIPTION
Reliable, clean, dynamic QSC power@Flat frequency response and super-low distortion@Defeatable clip limiters on each channel; switchable low-cut filter@Variable-speed fans with rear-to-front air flow@800 watts per side at 8 ohms; 4000 watts at 4 ohms bridged mono@Barrier strip, XLR, and 1/4" inputs; Speakon and binding post outputs
REVIEWS
Product rated 6.4 out of 10 (17 ratings)
