Hi PSpee,
I checked the specs on the Leviton amp and they look OK. Be sure you try the M3s with the "little volume device" CAT5 thing in the circuit. I'm suspicious of that. Or did you already try the M3s with the volume device connected?
Normally, the T2s will play quite loud--of course not as loud as a floorstanding speaker or one with more drivers-- with surprisingly decent bass output. It could be a defective driver, but as Mark pointed out, most unlikely you'd get two drivers at fault.
Regards,
Alan
