QSC Series Power Amplifiers

QSC RMX 850 Power Amplifier

The QSC RMX 850 Power Amp  combines their rugged high-output designs with the latest circuit technology to deliver unmatched performance at a breakthrough price. The RMX amps require only 2 rackspaces and feature 1/4" TRS, XLR, and barrier strip balance inputs; binding post and Neutrik Speakon outputs; front-mounted gain controls for easy access; independent and defeatable clip limiters; selectable low-frequency filters (30Hz or 50Hz) that protect speakers and increase headroom; signal and clip LED indicators; independent DC and thermal overload protection on each channel; variable-speed fan.

SPECIFICATIONS:  RMX 850

 STEREO MODE (Both Channels Driven)

8 ohms

  FTC 20 Hz - 20 kHz, 0.1% THD

185 W

  EIA 1 kHz, 0.1% THD

200 W

4 ohms

  FTC 20 Hz - 20 kHz, 0.1% THD

280 W

  EIA 1 kHz, 0.1% THD

300 W

2 ohms

   EIA 1 kHz, 1%  THD

 BRIDGE MONO MODE

8 ohms

  FTC 20 Hz - 20 kHz, 0.1% THD

530 W

  EIA 1 kHz, 0.1% THD

600 W

4 ohms 

   EIA 1 kHz, 1% THD

Signal to Noise, 20 Hz-20 kHz

100 dB

Distortion (SMPTE-IM)

<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 *

 ALL QSC MODELS

Distortion (Typical)

 20 Hz - 20 kHz: 10 dB below rated power

<0.03% THD, 4 and 8 ohms

 1.0 kHz and below: full rated power

<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

> 300 at 8 ohms

Input Impedance

10k ohms unbalanced, 20k 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

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)

Power Requirements

100, 120, 230 VAC, 50-60 Hz

Dimensions

19" (48.3 cm) rack mounting, 3.5" (8.9 cm) tall (2 RU),

15.9" (40 cm) deep (rack mounting to rear support ears)

Weight

35 lbs

* @ 120VAC, both channels driven; multiply current by 0.5 for 230V units