QSC RMX1450a Power Amplifier (Factory Re-Certified)

  • $599.99

This item is previously USED and has been re-certified at the QSC factory. It carries a one-year factory warranty from the date of purchase.

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 4O power ratings from 300 to 800 watts per channel. The RMXa Series amplifiers from QSC offer true professional-quality performance at an affordable price. RMXa amplifiers include a comprehensive set of features including XLR and 1/4” balanced inputs, Speakon® and binding post outposts for convenient connectivity. User-defeatable clip limiters and selectable low-frequency filters optimize sonic performance.


  • 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


  • 8 Ohm Power Rating: Stereo Mode (both channels driven): 260w (FTC 20 Hz – 20 kHz / 0.1% THD); 300w (EIA 1 kHz / 0.1% THD); Bridge-Mono Mode: 800w (FTC 20 Hz – 20 kHz / 0.1% THD); 900w (EIA 1 kHz / 0.1% THD)
  • 4 Ohm Power Rating: Stereo Mode (both channels driven): 400w (FTC 20 Hz – 20 kHz / 0.1% THD); 500w (EIA 1 kHz / 0.1% THD); Bridge-Mono Mode: 1400w (EIA 1 kHz / 0.1% THD)
  • 2 Ohm Power Rating: Stereo Mode (both channels driven): 700w (EIA 1 kHz / 0.1% THD)
  • Signal to Noise (20 Hz – 20 kHz) 8O: > -100 dB
  • Distortion (SMPTE-IM): < 0.01%
  • Input Sensitivity at 8O: 1.15V (+3.4dBu)
  • Voltage Gain: 40x (32 dB)
  • Open Circuitry: Class AB
  • Power Requirements: 6A (Typical, 1/8 power pink noise at 4 Ohm); 9.6A (Severe, 1/3 power pink noise at 4 Ohm)
  • Supplied Plug Type: NEMA 5-15
  • Weight: 40 lb (18.2 kg)


(1) QSC RMX1450a Power Amplifier
(1) US Power Cord
(1) Operator's Instructions

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