The T Amp is flat to 10 wpc output. My Antique Sound Labs MG S1 15DT puts out 5 wpc. When I had a pair of M22s, and M3s, I noticed that the ASL didn't drive the M22s nearly as well as the M3s. I use a pair of Michaura M55s with my T Amp. The Michauras are very much like the M22s, same 5.25" drivers, but use the 3/4" titanium tweeter from the M0-M1 and previous M2 (and Merak speakers as well). The M55s are much easier to drive than the M22s despite the very similar driver kit. I wouldn't judge the T-Amp based on the M22s, I think the M3s would be a mcuh better match.

Also, I think you need an external power supply to get these things up and singing. AA batteries just don't have the amps to get this thing going.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.