The RMXa Series is an update on a proven line of amplifiers line of amplifiers combining legendary QSC reliability, audio performance and affordability. Entertainers and touring users can continue to rely on the RMXa as one of the leading amplifier series in the world. For mid-power applications, the 2RU models offer 4Ω power ratings from 300 to 800 watts per channel. For premium speaker systems with extremely high power capacity the 3RU models (RMX 4050a and RMX 5050a) are unchallenged.

With 800 W/CH into 4 ohms and 1200 W/CH into 2 ohms all in a chassis that is less than 16" deep the RMX2450a is perfectly suited for performing musicians and mobile entertainers.

• 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

Power per Channel, Stereo Mode (both channels driven)

• 8 ohms, FTC 20 Hz-20 kHz, 0.1% tdD - 450 W
• 8 ohms, EIA 1 kHz, 0.1% tdD - 500 W
• 4 ohms, FTC 20 Hz-20 kHz, 0.1% tdD - 650 W
• 4 ohms, EIA 1 kHz, 0.1% tdD - 800 W
• 2 ohms, EIA 1 kHz, 1% tdD - 1200 W 2000 W 2500 W

Power, Bridge-Mono Mode

• 8 ohms, FTC 20 Hz-20 kHz, 0.1% tdD - 1300 W
• 8 ohms, EIA 1 kHz, 0.1% tdD - 1500 W
• 4 ohms, EIA 1 kHz, 1% tdD - 2400 W
• Signal to Noise (20 Hz-20 kHz) - -100 dB
• Distortion (SMPTE-IM) - < 0.02%
• Input Sensitivity at 8 ohms - 1.23V(+4.0 dBu)
• Voltage Gain - 50x (34 dB)
• Output Circuitry - 2-tier Class H
• Current Draw (120 V AC)
  • Typical, 1/8 power pink noise at 4 ohms* - 6.3 A
  • Severe, 1/3 power pink noise at 4 ohms* - 15.6 A
• AC Mains Plug
  • 100/120V - NEMA 5-15
  • 230V - CEE7/7
• Weight
  • Net - 44.5 lb (20.2 kg)
  • Shipping - 50.5 lb (23 kg)
• Distortion (typical)
  • 20 Hz-20 kHz, 10 dB below rated power -< 0.03% tdD, 4 ohms and 8 ohms
  • 1 kHz and below, full rated power -< 0.03% tdD, 4 ohms and 8 ohms
• Frequency Response - 20 Hz-20 kHz: +0/-1 dB -3 dB points: 5 Hz and 50 kHz (LF filter bybassed, 8 ohms)
• Damping Factor (1 kHz and below) - > 300 at 8 ohms
• Input Impedance - 10 k ohms unbalanced; 20 k ohms balanced
• Input Stage Clipping - 10 V rms (+22 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 - 3.5" (8.9 cm) tall; 2 rack spaces
• Power Requirements - 100, 120, 230 V AC (factory configured), 50-60 Hz