- Written by Matthew Abel
- Published on 09 March 2009
Onkyo TX-SR706 7.1 A/V Receiver On the Bench
All distortion measurements are within an 80 kHz bandwidth.
At 50 watts output (two channels driven), IMD was 0.024%.
THD+N vs. Frequency is shown below for 8 ohm and 4 ohm loads.This is pretty good performance. Even at 4 ohms and 50 watts output, distortion was only 0.05%. This receiver could be used, judiciously, with 4 ohm speakers.
THD+N vs. Power Output shows that, at 8 ohms, the power spectrum starts its steep upward slope at 90 watts, then clips (1% THD+N) at 130 watts (two-channels driven). At 4 ohms, it begins the steep climb at 120 watts and clips at 190 watts.
The measured frequency response was 10 Hz - 200 kHz, minus 1.8 dB.