Fourth test into 2.35 ohms at what would be 50 watts into 8 ohms. In my case this is about 170 watts into the 2.35 ohm load. Here distortion remains roughly the same as the third test, but shows a slight increase towards the high frequencies. This is near the maximum I can coax out of the 5630 with the power supply I've got as it droops too much to allow significantly more power into the 2 ohm load.