Used QSC RMX2450 Amplifiers

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  • Regular price $1,100.00
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500 W@8½ / 750 W@4½, 2 rack space

The QSC RMX 2450 gives you clean, dynamic power with the legendary QSC sound quality and reliability that pros depend on. The RMX Series deliver unmatched performance at a new breakthrough price.

The power supply is the heart of an amplifier, converting raw AC power from the wall to clean DC for the audio circuitry. The QSC RMX 2450 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.

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.

The QSC RMX 2450 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. 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.

QSC RMX 2450 Features:

¥ Compact size - up to 2400 watts in 2 rack spaces
¥ Professional quality performance - incorporates road-proven QSC designs
¥ High-current toroidal transformers for greater two-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
¥ Balanced 1/4" (6.3mm) TRS, XLR and barrier strip inputs
¥ Binding post and Neutrik Speakon outputs
¥ Front mounted gain controls for easy access
¥ Signal and Clip LED indicators to monitor performance
¥ Independent DC and thermal overload protection on each channel automatically protects amplifier and speakers

8 ohms
Ê FTC 20 Hz - 20 kHz, 0.1% THD 450W
Ê EIA 1 kHz, 0.1% THD Ê Ê Ê Ê 500W
4 ohms
Ê FTC 20 Hz - 20 kHz, 0.1% THD 650W
Ê EIA 1 kHz, 0.1% THD Ê Ê Ê Ê 750W
2 ohms
Ê ÊEIA 1 kHz, 1% THD Ê Ê Ê Ê 1200W


8 ohms
Ê FTC 20 Hz - 20 kHz, 0.1% THD 1300W
Ê EIA 1 kHz, 0.1% THD Ê Ê Ê Ê 1500W
4 ohms
Ê ÊEIA 1 kHz, 1% THD Ê Ê Ê Ê 2400W

Signal to Noise, 20 Hz-20 kHz 100 dB
Distortion (SMPTE-IM) Ê Ê Ê Ê Less than 0.02%
Input Sensitivity @8 Ohms Ê Ê Ê Ê 1.23V (+4.0 dBu)
Voltage Gain Ê Ê Ê Ê Ê Ê Ê Ê 50x (34dB)
Output Circuitry Ê Ê Ê Ê Ê Ê Ê ÊClass H
Power Requirements Ê Ê Ê Ê7A

Distortion (Typical)
Ê 20 Hz - 20 kHz: 10 dB below rated power Less than 0.03% THD, 4 and 8 ohms
Ê 1.0 kHz and below: full rated power Less than 0.03% THD, 4 and 8 ohms

Frequency Response 20 Hz-20 kHz, ±1 dB
Ê Ê Ê Ê Ê Ê Ê Ê -3 dB points: 5 Hz - 50 kHz
Damping Factor, 1 kHz and below Ê Ê Ê Ê Ê Ê Ê Ê Greater than 300 at 8 ohms
Input Impedance Ê Ê Ê Ê10k ohms unbalanced, 20k ohms balanced
Input Clipping Ê Ê Ê Ê10 Vrms (+22 dB)
Cooling Ê Ê Ê ÊContinuously variable-speed fan, rear-to-front air flow
Connectors, each channel Input: Active balanced; barrier strip, XLR and 1/4" (6.3mm)
Ê Ê Ê Ê Ê Ê Ê ÊTRS tip and XLR (pin 2 positive)
Ê Ê Ê Ê Ê Ê Ê ÊOutput: touch-proof binding posts and Neutrik¨ Speakon¨
Controls Ê Ê Ê Ê Ê Ê Ê ÊFront: AC switch, Ch. 1 and Ch. 2 gain knobs
Ê Ê Ê Ê Ê Ê Ê ÊRear: 10-position DIP switch
Indicators Ê Ê Ê ÊPower-On: Green LED
Ê Ê Ê Ê Ê Ê Ê ÊSignal: Yellow LED (1 per channel)
Ê Ê Ê Ê Ê Ê Ê ÊClip: Red LED (1 per channel)
Amplifier Protection Ê Ê Ê ÊStable into reactive or mismatched loads
Load Protection On/off muting, AC coupling (850, 1450), triac crowbar (1850HD, 2450, on each channel)
Power Requirements 100, 120, 230 VAC, 50-60 Hz
Dimensions Ê Ê Ê Ê 19" (48.3 cm) rack mounting, 3.5" (8.9 cm) tall (2 RU),
Ê Ê Ê Ê Ê Ê Ê Ê 15.9" (40 cm) deep (rack mounting to rear support ears)
Weight Ê Ê Ê Ê 44.5 lbs (20.2 kg) net