I have just purchased the latest Sound Lab M1

I think the pair of mfa 200d's on audiogon would drive the soundlab's fine as I was looking at them for my m2's. I talked with scott franklin in san jose ca to get his opinion and he said they would do a excellant job in controlling the panels.
If you go the OTL route I would invest in a pair of autoformers.

I own older M1's.

I owned a Levinson 336, but simultaneously home auditioned CAT JL-1's, and Parasound JC1's.

I tried the CAT JL-1's first. It would be an understatement to advise that I was astonished by what they were doing.

I then inserted the JC1's. Needless to say they weren't the CAT's. So, I didn't leave them connected for more than a brief period.

Without directly A/B'ing the JC1’s to the Levinson, my sense was that they equaled or even exceeded the Levinson. For less expense, I thought the Parasounds represented a good deal. But the CAT's -- older models and albeit used -- haven't left my listening room.

I've not tried Atma-sphere or Wolcott amps which have been used quite successfully with S/L’s, but based on lots of research (but no personal experience), I believe the former as a power source for the M1’s, would rival the CAT's -- different, but still superlative.

Something else to consider, if you like OTL-type sound, David Berning's new Quadrature Z. It extends the technology used in his ZH270 to much higher power applications--specifically 200 wpc into 8 ohm, 270 wpc into 4, with 'burst' of 300 wpc. Never heard them with Soundlabs, but sure sound awesome with what I have.

Oneprof, FWIW while unquestionably a brilliant design, the Berning isn't an OTL- it has both an output transformer and semiconductors in the output section.

Hi Ralph.

So, let me get this right, it's now a transformer couple Solid state amp :) what ever happen to it being a Digital amp.

Ralph, it's obvious that you don't understand the technology and that's okay man, it's a long way from the 50's type circuits.

We gave you several reasons before why the ZOTL technology cannot be a digital amp or a solid state amp and why none of the over 24 hand made transformers within these amps are audio transformers, now we didn't expect the average public to understand but we thought you might have.

Allan