I decided to perform a little testing and figured I would post the results of the 1k5 H.
I whipped out the 4 ohm dummy loads:
Series/Paralleled them for a 4 ohm load:
And this is what my power reading came out to be:
If my calculations are correct, that comes out to 348.53 watts RMS with little to no clipping. The next step up with clipping was 45.27 volts of output, which should come out to 487.95 watts RMS. Unfortunately, a photo with clipping was out of the question because I didn't want to shut my 55 amp power supply down.
After looking at these photos, I realized that I really need to spend some time organizing my bench!