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 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.
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RMX 4050HD AMPLIFIER
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STEREO MODE, Both Channels Driven
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| 8 ohms FTC 20 Hz-20 kHz 0.1% THD |
800 Watts
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| 4 ohms FTC 20 Hz-20 kHz 0.1% THD |
1300 Watts
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| 2 ohms FTC 20 Hz-20 kHz 0.1% THD |
1600 Watts
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| 8 ohms EIA 1 kHz 0.1% THD |
850 Watts
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| 4 ohms EIA 1 kHz 0.1% THD |
1400 Watts
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| 2 ohms EIA 1 kHz 1% THD |
2000 Watts
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BRIDGE-MONO MODE
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| 8 ohms FTC 20 Hz-20 kHz 0.1% THD |
2600 Watts
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| 8 ohms EIA 1 kHz 0.1% THD |
2800 Watts
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| 4 ohms EIA 1 kHz 1% THD |
4000 Watts
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| Distortion (SMPTE-IM) |
Less than 0.02% |
Distortion (Typical)
20 Hz-20 kHz: 10 dB below rated power
1 kHz and below: full rated power |
Less than 0.02% 4 ohm, less than 0.01% 8 ohms
Less than 0.02% 4 ohm, less than 0.01% 8 ohms |
Frequency Response
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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:
Controls Rear:
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AC power switch, Ch. 1 and Ch. 2 gain control
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.
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| Voltage Gain |
64x (36 dB) for 8 ohm load |
| Input Impedance |
20 k ohm balanced, 10 k ohm unbalanced |
Indicators
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Power-On: Green LED, Protect: Red LED
Signal -30dB: Yellow LED, Clip: Red LED |
Connectors Input:
Connectors Output: |
XLR female, TRS (1/4-inch), and barrier-strip screw terminals, each channel
Binding posts and Speakon outputs (Ch. 1 Speakon wired for biamp) |
| Cooling |
Continuously variable-speed fan, rear-to-front air flow |
Amplifier Protection
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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 |
19" 19.0" (48.3 cm) wide, 5.25" (13.3 cm) tall, 15.9" (40.39 cm) overall depth |
| Weight |
68 lb (30.84 kg) net, 77 lb (34.43 kg) shipping |
| All Specification Subject to Change Without Notice. |
