The QSC RMX850a 300 Watt 2 Channel Power Amplifier (RMX850a) from DJDeals.com is an update on a proven line of amplifiers line of amplifiers combining legendary QSC reliability, audio performance and affordability. Entertainers and touring users can continue to rely on the RMXa as one of the leading amplifier series in the world.
The QSC RMX850a 300 Watt 2 Channel Power Amplifier represents state-of-the-art in professional quality performance at an affordable price. Perfectly suited for a wide range of sound reinforcement applications including professional touring, performing musicians, and mobile entertainers, the QSC RMX850a 300 Watt 2 Channel Power Amplifier is optimized to deliver high levels of sustained power, extraordinary audio performance and road-proven reliability.
The QSC RMX850a 300 Watt 2 Channel Power Amplifier is a “heavy duty” model designed to work as hard into 2 ohm loads as most competing amplifiers will at 4 ohms.Both the RMX 5050a and RMX 4050a feature a three-tier, Class H design that is extremely efficient at real world power levels. Less AC current is wasted and more available current goes into producing useful audio power. 120 volt versions of the RMX4050a accomplish all this with a standard 15 amp plug.
QSC RMX850a 300 Watt 2 Channel Power Amplifier 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
QSC RMX850a 300 Watt 2 Channel Power Amplifier Specifications:
- 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, ±1 dB
- -3 dB points: 5 Hz-50 kHz
- Damping Factor, 1 kHz and below Greater than 300 at 8 ohms
- Input Impedance 10k ohms unbalanced, 20k ohms balanced
- Input Clipping 10 Vrms (+22 dBu)
- 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 Neutrikr Speakonr
- 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)












