The RMXa Series amplifiers from QSC offer true professional-quality performance at an affordable price. Three 2-rackspace models range in power from 430 to 1200 watts per channel at 2 ohms. Two 3-rackspace models provide 2000 to 2500 watts per channel at 2 ohms. All five models feature a compact chassis less than 16” deep. RMXa amplifiers include a comprehensive set of features including XLR and 1/4” balanced inputs, Speakon and binding post outposts for convenient connectivity. User-defeatable clip limiters and selectable low-frequency filters optimize sonic performance.
Selectable low-frequency filters (30 Hz or 50 Hz) protect speakers and increase headroom
The 4000-watt RMX4050a operates on a standard 15 amp plug (120V)
Both the RMX4050a and the RMX5050a feature a dual mono, high-current power supply for increased reliability and performance
The RMX4050a's particularly exceptional combination of cooling capacity and electrical efficiency provides robust thermal performance suitable for high continuous power in 2-ohm stereo or 4-ohm bridged applications.
Balanced 1/4” (6.3 mm) TRS, XLR, and barrier strip inputs
Touch-proof binding post and Neutrik Speakon® outputs
Front mounted gain controls for easy access
Signal and clip LED indicators for monitoring performance
Independent DC and thermal overload protection on each channel automatically protects amplifier and speakers
8O, FTC 20 Hz–20 kHz, 0.1% tdD : 185 W
8O, EIA 1 kHz, 0.1% tdD : 200 W
4O, FTC 20 Hz–20 kHz, 0.1% tdD : 280 W
4O, EIA 1 kHz, 0.1% tdD : 300 W
2O, FTC 20 Hz–20 kHz, 1% tdD : –
2O, EIA 1 kHz, 1% tdD : 430 W
Power, Bridge-Mono Mode
8O, FTC 20 Hz–20 kHz, 0.1% tdD : 530 W
8O, EIA 1 kHz, 0.1% tdD : 600 W
4O, EIA 1 kHz, 1% tdD : 830 W
Signal to Noise (20 Hz–20 kHz) : -100 dB
Distortion (SMPTE-IM) : < 0.01%
Input Sensitivity at 8O : 1.15V (+3.4dBu)
Voltage Gain : 31.6x (30 dB)
Output Circuitry : Class AB
Current Draw (120 V AC)
Typical, 1/8 power pink noise at 4O* : 4.5 A
Severe, 1/3 power pink noise at 4O* : 6.6 A
AC Mains Plug
100/120V : NEMA 5-15
230V : CEE7/7
Distortion (typical)
20 Hz–20 kHz, 10 dB below rated power : < 0.03% tdD, 4O and 8O
1 kHz and below, full rated power : < 0.03% tdD, 4O and 8O
Frequency Response : 20 Hz–20 kHz : +0/-1 dB -3 dB points : 5 Hz and 50 kHz (LF filter bybassed, 8O)
Damping Factor (1 kHz and below) : > 300 at 8O
Input Impedance : 10 kO unbalanced; 20 kO balanced
Input Stage Clipping : 10 V rms (+22 dBu)
Cooling : Continuously variable speed fan, back-to-front air flow
Connectors (each channel)
Input : Active balanced; 3-pin Euro-style detachable terminal block and XLR (pin 2+) :
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