I always liked those Mosfet Hafler amps and has been forever since I owned one. I do, however, own a quite rare bird of a Mosfet amplifier originally made by Rockford Fosgate. Sales didn't go that well since they were a big car audio company and some stuff got "forced", in a way, onto Hafler and they tried with them as well. They were basically the old school Power 1000 amplifiers built into a home amp. It uses 32 Mosfet, is also bridgeable, and lists 8-ohm power in the manual as "over 200 watts per channel from 20hz to 20khz" and over 300 at 4-ohm and has peak output current of 50 amperes. It's quite the beast. I bought it over 5 years ago and hooked it up but it was no worky. I emailed various people I knew from my past life in the industry (including RF as I was a rep for them) and they came up with some minimal info on them. You see these and the Hafler version come up on auction once in awhile and the last Hafler went for $480 and RF for $580.
I decided to get my Dynakit ST-70 out on Monday and hook it in place of the modified Carver M-1.0t and really enjoyed how it sounded. Then, I hooked up the Rockford RF2000 amp, which I had got working BTW, and was quite amazed at how it sounded. I'll be honest....it's going to stay in place for awhile. I never gave it a fair chance...or maybe I was too lazy in moving that 40 pound amp around. lol Oh, and it uses two caps in the PS at over 80,000uf combined with a HUGE torroid transformer. I believe the Mosfets are TO-220's. I thought I had a picture of the huge caps and the (I think) 8" diameter transformer but I guess I don't.
An inside shot...
And a shot of the torroid and 40,000uf caps (from the web)