Has any had experiecne with the MF 550k superchar?

Warrenh, Perhaps the MF unit is (was) not moving because of its cost if nothing else. Its original price of 5K was a bit steep. Consider that Nelson Pass developed a very similar devise for less than half as much. Perhaps that is why MF has reduced their price.

Personally, if I wanted one of these I'd get Pass's devise based on, if for no other reason than, his track record as an American designer of high quality audio amps and pre-mps for many years. FWIW it was reviewed in 6moons.

Newbee,

Are you referring to the First Watt F4? I own an F4 clone, and while it's a fabulous amp and does pretty much what the MF 550K does using the speaker inputs (no voltage gain, just current gain) the F4 only makes about 25 watts, a far cry from the MF's 550 wpc. That probably explains some of the price difference; the rest may be because the MF also has a regular driver stage and can function as a conventional amp with gain, something the F4 can't do. I've never heard the MF, but I would be very surprised if it sounded similar to the F4 if only because it makes so much more power.

I do agree with you that any amp Nelson Pass has designed is a good bet, as long it's a suitable match for your application. His First Watt series are all different and pretty specialized.

David

Guys, I love my SET, but I have speakers, though 101db, can handle 300+ watts. Sometimes I want to move the picture frames on my walls. My amp puts out 35 wpc, which does some serious tympanic pounding, but the thought of having an amp that would give me SET sound from <1 watt to 500 watts is exciting. $2500. Not bad. This First Watt F4 is just a bit (light years) off topic.