I have had over the last few years VAC, Carey, Pass, Fi and most recently ARC REF 300 MKII's and Accuphase A-50V's bridged to monoblocks. I have heard the Atma-Sphere's on a number of occasions at a friends who owns them. I spent a considerable amount of time A/Bing the Tenors and the AR and Accuphase. IMOP none are in the same league as the Tenors, which I now own( 75WI). These are the best amps I have ever had in my system, and do just about everything right and so far nothing overtly wrong. Excepting VERY difficult loads, I think they are up to the task of driving a wide variety of speakers.Beautiful mids, lovely extended highs, holographic, palpable instruments pinpoint placed in an excellent wide and deep soundstage. But most surprising, GREAT bass, deep, taut and very natural sounding. These amps take a layer of film off the music I didn't even know was there till I noticed it's absence. Dynamic, fast with superb PRT. They are well worth the effort of auditioning. I am currently driving Piega P-10's with the Tenors.
