QSC RMX 4050a 2-Channel Power Amplifier, 1400W at 4 Ohms

The RMXa Series is an update on a proven 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 RMX4050A offers a 4 Ω power rating of 1400W per channel. The RMXa Series amplifiers from QSC offer true professional-quality performance at an affordable price.

Features

• 1400W per channel @ 4 Ω
• Balanced 1/4", TRS, XLR, and barrier strip inputs
• Touch-proof binding post and Neutrik speakON® outputs
• User-defeatable clip limiter
• Selectable low-frequency filters to optimize performance

Specifications

• Stereo Mode (both channels driven):
  • 8 Ω / FTC 20 Hz – 20 kHz / 0.1% THD: 800W
  • 8 Ω / EIA 1 kHz / 0.1% THD: 850W
  • 4 Ω / FTC 20 Hz – 20 kHz / 0.1% THD: 1300W
  • 4 Ω / EIA 1 kHz / 0.1% THD: 1400W
  • 2 Ω / FTC 20 Hz – 20 kHz / 1% THD: 1600W
  • 2 Ω / EIA 1 kHz / 1% THD: 2000W
• Bridge-Mono Mode:
  • 8 Ω / FTC 20 Hz – 20 kHz / 0.1% THD: 2600W
  • 8 Ω / EIA 1 kHz / 0.1% THD: 2800W
  • 4 Ω / EIA 1 kHz / 1% THD: 4000W
• 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: 10.0 A
  • Severe, 1/3 power pink noise at 4Ω: 20.1 A
• Supplied Plug Type, 100/120V: NEMA 5-15
• Supplied Plug Type, 230V: CEE7/7
• Net Weight: 68 lb (30.8 kg)
• Shipping Weight: 77 lb (34.9 kg)
• Distortion (typical)
  • 20 Hz – 20 kHz: 10 dB below rated power: < 0.02% THD / 4Ω and 8Ω
  • 1.0 kHz and below: full rated power: < 0.02% THD / 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: 10k ohms unbalanced / 20k ohms balanced
• Input Clipping: 6.4 Vrms (+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 / Ch. 1 & 2 gain knobs
  • Rear: 10-position DIP switch
• Indicators:
  • Power-on: Green LED
  • Signal: Yellow LED (1 per channel)
  • Clip: Red LED (1 per channel)
  • Protect: Red LED
• Amplifier Protection: Full short circuit, open circuit, thermal, 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-in (13.3 cm) tall / 3 rack spaces
• Power Requirements: 100, 120, 230 VAC, 50 – 60 Hz (factory configured)