Bel..AVo 200.2, Musical Fidelity A3cr, YBA 2hc, Pass X150

I do not have experience with all of these amps, but I own the MF A3cr and absolutely love it. I prefer by a significant margin to the Krells I have heard (admittedly not hte most expensive ones). It is smooth and detailed without being shrill or forward. I might change other things, but have absolutely no longing to change my A3cr amp or pre-amp.

I have Magnepans which are not Bass heavy and only really listen to classical, so I can't speak to heavy drum set music, but I find the bass to be very good. I had a Bryston before and find the A3cr tighter and more focused in the bass. I hear everything all the way down to the limits of my speakers. I'm a classical musician and I find the low end reproduction very realistic, but as I said I'm not dealing with amplified music which has much more bass (though the little I have heard on my system seemed to have good bass - I just can't compare).

Jorge, I had a 3B-ST with and old 0.5b pre-amp. First went the pre-amp to the A3cr pre which I liked so much, I bought the amp. They also have a great effect when used together and this may explain the improvement over the Bryston (which I liked very much, just no as much).

I have Magnepan 1.5qrs bi-wired with Analysis Plus Oval 9 and Oval 12 and use as my main source an Arcam Alpha 7se (same transport as the Alpha 9se) as transport with a Bel Canto DAC 1.1. My digital cable is a Illuminati D-60, the audio interconnects are TMC (white and yellow) and I use an assortment of inexpensive after-market power cords (all under $100 used or new when I bought them) and a Monster HTS 2000 surge protector.

While the A3cr is not a devastating amount of power, I find it ample. There is a limit to how loud the Maggies can get. I have heard of many people who succesfully bi-amp the A300 and an A3cr, they are apparently gain matched (most use the A3cr for the bass)