Tube-amp for Magnepan?

I also run Manley mono 250s with my 20.1s. Using SED Winged C EL34s, Marconi-Osram A2900s and RCA black longplate 12BH7s. Don't have any trouble with bass extension and with my tube preamp have been able to dial in a just-the-other-side-of-neutral warm sound....the way I like it.

I lived with a pair of highly modified MG IIIA's for many years, and tried many different amps with them, both ss and tubed. I always returned to tubes, and settled on Manley 200's, which I use to this day (with different speakers). For me, the issue was always one of excessive leanness with ss amps. Only tubes would make the speakers sound dimensional enough, and with enough fullness to sound realistic. But when they did, they sounded glorious. The other issue was that ss amps, regardless of pedigree, made worse the Maggie's main flaw (for me). That is, the obvious discontinuity between the ribbon tweeter, and the planar midrange. With ss, the ribbon's superior speed and resolution was laid bare, and became an annoyance. With tubes, there was much better integration of the two different frequency ranges. I always preferred the handling of dynamics with tubes.

MG II's don't have a ribbon tweeter, so continuity between tweeter and mid will be, in theory, better. A good modern ss amp might give you a needed sense of clarity in the very top end, but I doubt that you will be able to get the kind of dimensionality that a good tube amp will. My Manley's put out 100 watts in triode, and it was pleny of power. Good luck.

No disrespect to the thread......but glad to hear from satisfied Manley amp owners. I bought the Manley's in 05 and talked to Paul Fargo who heads up their tech support. What sold me was that he stated these amps were "voiced" for the Maggies. At this point in our conversation he did not know I owned a pair of the 3.6's.

I have recently bi-amped my 20.1 with a VTL ST-150 (75 w in triode mode) on top and 120w/ch Bel Canto on the bottom through a Bryston 10B crosover. I'm upgrading from 600w/ch solid state.
The enjoyment increase resulting from this change is astounding.

I have a pair of Maggie 1.7's driven by two Mac 275 Tube amps = Heaven. I use 1 amp per channel I guess they would call that Mono blocked and delivers 150 watts per speaker. I have had this system turned up in Party Mode without any adverse affects. The 275's are absolutely noiseless (total Black background). These things weigh appox. 70-80lbs each and seem to me have all the current that the Maggies need plus the power. I would look first for a good used one or 2
and see what you think. Goodluck with your search, Mel.