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QSC Audio RMX 850
The power supply is the heart of an amplifier, converting raw AC power from the wall to clean DC for the audio circuitry. RMX amplifiers use powerful high-current toroidal transformers 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.
The RMX 850 delivers true studio-quality sound. A full complementary output circuit using the highest-grade linear output devices delivers ultra-low distortion ( <0.01% THD) & a ruler-flat frequency response. Unlike other designs, RMX output devices are direct-mounted to the heat sink for optimum thermal coupling & cooling.
This is a truly reliable amplifier. 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. Low-noise variable speed fans with rear-to-front air flow keep amplifiers and racks cool.
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Specifications
- Output Power (Stereo, EIA, both channels driven)
- 8 ohms EIA 1 kHz: 0.1% THD 200W
- 4 ohms EIA 1 kHz: 0.1% THD 300W
- 2 ohms EIA 1 kHz: 1% THD 430W
- Output Power (Bridged Mono)
- 8 ohms EIA 1 kHz: 0.1% THD 600W
- 4 ohms EIA 1 kHz: 1% THD 830W
- Signal to Noise (20 Hz-20 kHz): 100 dB
- Distortion (SMPTE-IM): Less than 0.01%
- Input Sensitivity @ 8 ohms: 1.15v (+3.4 dBu)
- Voltage Gain: 31.6x (30 dB)
- Output Circuitry: AB
- Power Requirements (1/8 power pink noise at 4 ohms 1):
5 A
- Weight: 35 lb (15.9 kg)
- Distortion (Typ) 20 Hz-20 kHz 10 dB below rated
power: Less than 0.03% THD 4 and 8 ohms
- Distortion (Typ) <1.0 kHz full rated power: Less
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): 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 positive, Output - touch-proof binding posts and
Neutrik Speakon
- Controls: Front - AC switch, Ch. 1 and Ch. 2 gain knobs,
Rear - 10-position DIP switch
- Indicators: Power On - Green LED
- Amplifier Protection: Stable into reactive or mismatched
loads
- Load Protection: On/off muting, AC coupling (850, 1450),
triac crowbar
- 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
Notes:
1) measured at 120VAC, both channels driven; multiply current by
.5 for 230V units
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