Sorry to arrive late to this thread, but I am driving 20.1 currently with both ARC VM220 and VTL MB450, as well as other solid state options. I agree, less tubes work fine, especially if you were to biamp. But I am satisfied with both aforementioned tube amps as standalone amplifiers with my freshly rebuilt 20.1's. although I had given some thought to the ref 610t, I am glad I didn't do it. Too mant tubes, runs too hot, and I am very satisfied with why I have. I have a small room, however, perhaps if I had a 1500 sq ft. Great room, I would need more power! But if I did, I would biamp, 200 tube watts driving mids and tweeters is a lot if power!
Ps, arc tube amps run hot! You can sure tell the difference as opposed to the VTL, which are much cooler running...
Ps, arc tube amps run hot! You can sure tell the difference as opposed to the VTL, which are much cooler running...