I too have used tube power amps for my RT7. Currently a SoundTech Power Amp One (using 6550s). This suggests that a tube amp with 6550s will give the kind of bass impact you want. I have liked the way the speakers sounded with my Anthem Amp 1- EL34s- (iwhich powers my other system) but not quite as much bass oomph as the 6550s. Strangely, though, a Sonic Frontiers SFS 80 (using KT90s) sounded dead with the RT7s (but good with other speakers.)
I heard my RT7 when auditioning them with a Bryston 4B. A pretty good combination but not the best I've heard with solid state. I preferred the Audiolab 8000P, and if you can afford it, the Bryston 7b. An aquaintance I once knew had the RT7s with a Classe (I can't remember if DR8 or 9) and it was excelllent. My first choice for ss amp.
Michael
I heard my RT7 when auditioning them with a Bryston 4B. A pretty good combination but not the best I've heard with solid state. I preferred the Audiolab 8000P, and if you can afford it, the Bryston 7b. An aquaintance I once knew had the RT7s with a Classe (I can't remember if DR8 or 9) and it was excelllent. My first choice for ss amp.
Michael