Audio Research 100.2 vs. 150.2

Don't do it. With your speakers you will lose the magic... The 150.2 is not in same league as the 100.2. Trust me.

Thanks Dlwask and Gmele. Gmele, I'm curious upon what basis you caution against the 150.2. I know the amps are radically different in design, the 150.2 being a digital switching amp. This is, in part, what concerns me as I love the sound of the 100.2 and really just want a cool running version of the same sounding amp. However, I wonder if you could share your impressions in greater detail. Have you run them in an A-B comparison? What do you consider to be the characteristics of the 100.2 which are superior?
As I said, I heard the 150.2 at a dealer using exactly the same gear (except cables) and, obviously, a different room. While my system at home with the 100.2 immediately draws me into the music with an effortless musicality, the same system with the 150.2 did not. I found it etched, cool, and "HiFi" sounding. Again, the room and cables were different but I do not think the stark contrast between the two systems can be explain on this basis alone. Anyway, I'd really be curious if you or anyone else with experience hearing these products could discuss their merits (and demerits) in greater depth. Thanks. Also, Dlwask. Do you have the name of the wisper quiet fan your friend uses in case I keep the 100.2?

I had the 150.2 and it is really a very bad amplifier. High distortion, clipped easily and even went into oscillation. I am being very candid here in my post because I really want to say much more.