Ola Riffman
I don't know if there was a problem with the M22s I had for a very short period of time. Mine just didn't sound right. I've read the reviews and other folks' posts and can only conclude there was a problem with my pair. Axiom handled the matter in grand style, of course, and I ended up with a pair of M50s in their place. The M3Tis I had were super tube friendly speakers. Now, the funny thing is, what I replaced my M3s with are a bunch of Michaura speakers. I use the M55s which have the same driver compliment as the M22s, (exact same drivers), but use the Merak/previous M2, M1, M0, QS4 ... 3/4" titanium tweeter. These things are wonderful with the 5 wpc tubie and wonderful with the T Amp as well.
I modified my M55s with Jensen paper/oil capacitors (really expensive), indulged them with some internal silver speaker wire, and damped them with some acoustic foam from partsexpress. They're good!
Anyway, I can't say that the T Amp colors the sound with these efficient speakers. The M55s are rated at 93db and I relieve the T Amp of low frequency duty by running all the speakers from the line outs of my Velodyne subwoofer.
I agree that the T Amp sounds more tube like than sandy.
I think an A/B comparo between a T Amp driven by external power source and the NAD would be interesting. I wouldn't bet on the NAD.
Anyway, here's an interesting link to a fella who has done some extensive mods to his T Amp, including a nice R2D2 style housing.
site found here:
http://www.michael.mardis.com/sonic/maunakea.htm
a bit more
http://www.michael.mardis.com/sonic/news.htm#sound