QSC RMX4050a

Features

• Compact size – up to 2500 watts in two rack spaces, or 5000 watts in three rack spaces
• 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
• The 4000-watt RMX4050a operates on a standard 15 amp plug (120V)
• Both the RMX4050a and the RMX5050a feature a dual mono, high-current power supply for increased reliability and performance
• The RMX4050a's particularly exceptional combination of cooling capacity and electrical efficiency provides robust thermal performance suitable for high continuous power in 2-ohm stereo or 4-ohm bridged applications.
• Balanced 1/4" (6.3 mm) TRS, XLR, and barrier strip inputs
• Touch-proof binding post and Neutrik Speakon® outputs
• Front mounted gain controls for easy access
• Signal and clip LED indicators for monitoring performance
• Independent DC and thermal overload protection on each channel automatically protects amplifier and speakers
• 3-year warranty plus optional 3-year extended service contract

Specification

Power per Channel, Stereo Mode (both channels driven)

• 8Ω, FTC 20 Hz–20 kHz, 0.1% tdD:800 (650**) W
• 8Ω, EIA 1 kHz, 0.1% tdD :850 W
• 4Ω, FTC 20 Hz–20 kHz, 0.1% tdD :1300 W
• 4Ω, EIA 1 kHz, 0.1% tdD :1400 W
• 2Ω, FTC 20 Hz–20 kHz, 1% tdD:1600 W
• 2Ω, EIA 1 kHz, 1% tdD :2000 W

Power, Bridge-Mono Mode

• 8Ω, FTC 20 Hz–20 kHz, 0.1% tdD :2600 W
• 8Ω, EIA 1 kHz, 0.1% tdD :2800 W
• 4Ω, EIA 1 kHz, 1% tdD :4000 W
• Signal to Noise (20 Hz–20 kHz) :-100 dB
• Distortion (SMPTE-IM) :< 0.02%
• Input Sensitivity at 8O :1.42V (+5.3 dBu)
• Voltage Gain :64x (36 dB)
• Output Circuitry :3-tier Class H
• Current Draw (120 V AC)Typical, 1/8 power pink noise at 4Ω*Severe, 1/3 power pink noise at 4Ω*:10.0 A 20.1 A
• AC Mains Plug 100/120V 230V:NEMA 5-20 CEE7/7
• Weight Net Shipping:75 lb (33.1 kg) 87 lb (37.2 kg)
• Distortion (typical) 20 Hz–20 kHz, 10 dB below rated power 1 kHz and below, full rated power:< 0.02% tdD, 4Ω and 8Ω < 0.02& tdD, 4Ω and 8Ω
• Frequency Response :20 Hz–20 kHz: +0/-1 dB -3 dB points: 5 Hz and 50 kHz (LF filter bybassed, 8Ω)
• Damping Factor (1 kHz and below) :> 250 at 8Ω
• Input Impedance :10 kΩ unbalanced; 20 kΩ balanced
• Input Stage Clipping :6.4 V rms (+18 dBu)
• Cooling :Continuously variable speed fan, back-to-front air flow
• Connectors (each channel) :Input: Active balanced; 3-pin Euro-style detachable terminal block and XLR (pin 2+) Output: Touch-proof binding posts; Neutrik Speakon®
• Controls :Front: AC switch; Channel 1 & 2 gain knobs Rear: 10-position DIP switch
• LED Indicators:Power on: Green; Signal: Yellow (1 per channel); Clip/Protect: Red (1 per channel)
• Amplifier Protection :Full short circuit, open circuit, tdermal, ultrasonic, RF protection. Stable into reactive or mismatched loads
• Load Protection :Turn-on/off muting; AC coupling (850, 1450); Triac crowbar (1850HD, 2450, 4050HD, 5050) on each channel
• Dimensions :5.25" (13.3 cm) tall; 3 rack spaces
• Power Requirements :100, 120, 230 V AC (factory configured), 50–60 Hz