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QSC Audio RMX 850 Professional Power Amplifier The RMX Series amplifiers give 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. 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 ( Comprehensive Features The RMX Series is packed full of professional features that increase performance and flexibility: The RMX 1850HD provides improved thermal performance that gives you higher continuous power in 2-ohms stereo or 4-ohms bridged applications (a RMX 1850HD exclusive!) 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. 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 3-year warranty plus optional 3-year extended service contract RMX SPECIFICATIONS RMX 850 RMX 1450 RMX 1850HD RMX 2450 STEREO MODE, EIA: Both Channels Driven 8 ohms EIA 1 kHz, 0.1% THD 200W 280W 360W 500W 4 ohms EIA 1 kHz, 0.1% THD 300W 450W 600W 750W 2 ohms EIA 1 kHz, 1% THD 430W 700W 900W 1200W BRIDGE MONO MODE 8 ohms EIA 1 kHz, 0.1% THD 600W 900W 1200W 1500W 4 ohms EIA 1 kHz, 1% THD 830W 1400W 1800W 2400W Signal to Noise, 20 Hz-20 kHz 100 dB 100 dB 100 dB 100 dB Distortion (SMPTE-IM) Less than 0.01% Less than 0.01% Less than 0.02% Less than 0.02% Input Sensitivity @ 8 ohms 1.15v (+3.4 dBu) 1.15v (+3.4 dBu) 1.16v (+3.5 dBu) 1.23v (+4.0 dBu) Voltage Gain 31.6x (30 dB) 40x (32 dB) 46x (33 dB) 50x (34 dB) Output Circuitry AB AB Class H Class H Power Requirements1/8 power pink noise at 4 ohms * 5 A 6 A 6 A 7 A Weight 35 lb (15.9 kg) net 40 lb (18.2 kg) net 44.5 lb (20.2 kg) net 44.5 lb (20.2 kg) net 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 ohmsLess than 0.03% THD 4 and 8 ohms Frequency Response 20 Hz-20 kHz, +/- 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 (+22 dB) Cooling Continuously variable-speed fan, rear-to-front air flow Connectors, each channel Input: Active balanced; barrier strip, XLR and 1/4" (6.3mm)TRS tip and XLR pin 2 positiveOutput: touch-proof binding posts and Neutrik Speakon Controls Front: AC switch, Ch. 1 and Ch. 2 gain knobsRear: 10-position DIP switch Indicators Power-On: Green LED Signal: Yellow LED (1 per channel)Clip: Red LED (1 per channel) Amplifier Protection Stable into reactive or mismatched loads Load Protection On/off muting, AC coupling (850, 1450), triac crowbar(1850HD, 2450, on each channel) Dimensions 19" (48.3 cm) 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 * @ 120VAC, both channels driven; multiply current by .5 for 230V units All Specification Subject to Change Without Notice.
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