My ears were burning so I knew someone was talking my name in vain :-)
Well, not really. I think the key to my success using 12 wpc SET monoblocks with the Ref 3s in a VERY large room is ... the transformers. My friend who designed and built the amps got the trannies custom-wound IIRC from Magnequest. Tubes make a big difference too -- I'm using 845Ws from superTNT (no longer available), JJ KT-77s and Mullard ECC31s (replacing the original Mullard EL-34s and RCA 6N7s respectively). Clearly there's a lot of system synergy at work, but I repeat that I have never heard the amps clip. Dave