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 New QSC

The new RMX Series amplifiers give you clean, dynamic power with the legendary QSC sound quality and reliability that pros depend on. We combined our rugged high output designs with the latest circuit technology to deliver unmatched performance at a new breakthrough price.

Muscular Power Plant
The power supply is the heart of an amplifier, converting raw AC power from the wall to clean DC for the audio circuitry. The RMX uses a powerful high-current toroidal transformer and ample filter capacitance to ensure generous energy reserves. This makes a critical difference in sound quality, allowing the amp to effortlessly punch out high level transients, even when driving abusive 2-ohm speaker loads.

 Superior Performance
RMX amplifiers deliver true studio-quality sound. A full complementary output circuit using the highest-grade linear output devices delivers ultra-low distortion (<0.05% THD) & a ruler-flat frequency response. SMT (Surface Mount Technology) triples small-signal component density, enabling us to pack up to 2400 watts of power in a chassis only 2 rack spaces & less than 16" deep. And unlike other designs, RMX output devices are direct-mounted to the heat sink for optimum thermal coupling & cooling.

Comprehensive Features
The RMX Series is packed full of professional features that increase performance and flexibility:

  • Independent defeatable clip limiters reduce distortion without sacrificing peak performance.

  • Selectable low-frequency filters boost system response, protect speakers and ensure low-end tightness by more precisely matching the amplifier's range to the loudspeakers.
  • Barrier strip, XLR and 1/4" balanced inputs plus Speakon and binding post outputs provide easy connections.
  • Low-noise variable speed fans with rear-to-front air flow keep amplifiers and racks cool.

    Proven Reliability
    With over 30 years of building amplifiers for the largest touring companies and venues around the world, you can count on QSC's reputation for designing the most reliable amps available.


    RMX 850

    RMX 1450

    RMX 2450

    Stereo Mode (EIA: both channels driven)




    8 ohms EIA 1 kHz 0.1% THD




    4 ohms EIA 1 kHz 0.1% THD




    2 ohms EIA 1 kHz 1% THD




    Bridge Mono Mode




    8 ohms EIA 1 kHz 0.1% THD




    4 ohms EIA 1 kHz 1% THD




    Signal to Noise (20 Hz-20 kHz)

    100 dB

    100 dB

    100 dB

    Distortion (SMPTE-IM)

    Less than 0.01%

    Less than 0.01%

    Less than 0.02%

    Input Sensitivity @ 8 ohms

    1.15v (+3.4 dBu)

    1.15v (+3.4 dBu)

    1.23v (+4.0 dBu)

    Voltage Gain

    31.6x (30 dB)

    40x (32 dB)

    50x (34 dB)

    Output Circuitry



    Class H

    Current Consumption (1/8 power pink noise at 4 ohms @ 120VAC,
    both channels driven; multiply current by .5 for 230V units.)




    Weight (Net)

    35lb. (15.9 kg)

    40lb. (18.2 kg)

    44.5lb. (20.2 kg)

    All Models

    All Models

    Distortion (typical)
    20 Hz-20 kHz: 10 dB below rated power
    1.0 kHz and below: full rated power

    Less than 0.03% THD 4 and 8 ohms
    Less than 0.03% THD 4 and 8 ohms

    Frequency Response

    20 Hz-20 kHz, ± 0/-1 dB, -3 dB points: 5 Hz-50 kHz

    Damping Factor (1 kHz and below)

    greater than 300 at 8 ohms

    Input Impedance

    10 K ohms unbalanced, 20 K ohms balanced

    Input Clipping

    10 Vrms (+22dBu)


    Continuously variable speed fan, rear-to-front air flow

    Connectors (each channel)

    Input: Active balanced; barrier strip, XLR and 1/4" (6.3 mm).
    TRS tip and XLR pin 2 positive
    Output: "Touch-proof" binding posts and Neutrik Speakon


    Front: AC switch, Ch.1 and Ch.2 gain knobs
    Rear: 10-position DIP switch


    PWR-ON: Green     LED SIGNAL: Yellow LED (1 per channel)
    CLIP: Red LED (1 per channel)

    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
    (2450, on each channel)


    19" (48.3cm) rack mounting, 3.5" (8.9 cm) tall (2 rack spaces),
    15.9" (40 cm) deep (rack mounting to rear support ears)

    Power Requirements

    100, 120, 230 VAC, 50-60 Hz



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