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QSC RMX4050HD Amplifier Test Results

Good heavyweight all-rounder from QSC

The RMX4050HD performed well in the tests, the results were consistent and distortion was low. Clipping behaviour is excellent with no nasties, and at 40Hz there is no evidence of power supply ripple on either channel. A very good all-round heavyweight amplifier.



Freq 8R Performance 4R Performance 2R Performance
  Watts THD% Watts THD% Watts THD%
40Hz 9070.1514710.30--
1kHz8900.2014290.30--
10kHz8760.2013990.27--
All results taken with sine wave input into a resistive dummy load of 8, 4 and 2 ohms (where applicable), two channels simultaneously driven (unless otherwise stated), at the threshold of clipping. These results should be considered maximum 'continuous RMS' power ratings (>5 seconds). Distortion measurements, labelled THD%, are taken with an HP8903A audio analyser (80kHz Bandwidth).

Manufacturer QSC
Model RMX4050HD
Weight 29 kg
Power to weight Ratio1 98.8 W/kg
Notes Good performance, nice clipping behaviour. Mains voltage did not fall below 238V. 30-04-2010.
Manufacturer's Website http://www.qscaudio.com

1 Power to weight ratio is calculated by taking the average of the power measurements at 4 ohms, multiplying by the number of driven amp channels, and then dividing this value by the weight of the amplifier.

Click the images below for full-size versions

QSC RMX4050HD front and back. (Image from Google, no photo was taken of the actual amp under test).

Description of Images:

  1. QSC RMX4050HD front and back. (Image from Google, no photo was taken of the actual amp under test).


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