I have Trio 2.2 and tried an Atma-shpere M60 MK.II. The sound was very, very fast. The highs were rolled off and the sound was dead. I got board very quick. I suspect there must be an impedence drop in the top end. I use a pair of Viva Aurora monos. They use the 845. They sound very balanced and extended from top to bottom. They are alot of power for Trios and can play them at an insanely loud volume. I have only tried this a few times for a couple of minutes to impress my non-audiophile friends. I found the sound to be fast until I heard the Atmas. The Atmas I felt were maybe to fast, if that is possible. I will be trying a friends Wavac 300b next week. E-mail me if you would like to know my opinion on how it sounds.
Steve.
Steve.