QSC RMX4050A | 2-channel Amplifier | 850w 8ohms

RMX 4050a

Two-Channel Power Amplifier

• 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-inch (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

Specifications

Power per Channel, Stereo Mode (both channels driven)

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

Power, Bridge-Mono Mode

• 8Ω, FTC 20 Hz–20 kHz, 0.1% THD
  • 2600 W 
• 8Ω, EIA 1 kHz, 0.1% THD
  • 2800 W 
• 4Ω, EIA 1 kHz, 1% THD
  • 4000 W

Other 

• Signal to Noise (20 Hz–20 kHz)
  • -100 dB
• Distortion (SMPTE-IM) 
  • < 0.02%
• Input Sensitivity at 8Ω
  • 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*
    • 10.0A
  • Severe, 1/3 power pink noise at 4Ω*
    • 20.1A
• AC Mains Plug 100/120V 230V
  • NEMA 5-15 CEE7/7
• Distortion (typical)
  • 20 Hz–20 kHz, 10 dB below rated power
    • < 0.02% tdD, 4Ω and 8Ω
  • 1 kHz and below, full rated power
    • < 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
• Product Dimensions (H×W×D)
  • 132 (3 RU) × 482 × 404 mm
  • 5.25 (3 RU) × 19 × 15.9 in
• Carton Dimensions (H×W×D)
  • 610 × 560 × 229 mm / 24 × 22 × 9 in
• Net Weight
  • 30.8 kg / 68 lb
• Shipping Weight
  • 34.9 kg / 77 lb 
• Power Requirements
  • 100, 120, 230 V AC (factory configured), 50–60 Hz