I have the 6.5s. IMHO, a 30W tube amp will not have enough control over the woofers. They are fairly efficient, so volume won't be a problem, but I think they will sound too boomy with that amp. Before I bought my Rowland Model 10, which controls the 6.5s very well, I tried out a Cary V12 (50W) and it couldn't control the 6.5's woofers well enough for my taste. Also, the 6.5s need a fairly large room, I'd say at least 300 sq.ft., or the bass will overpower the room.
