Having owned a FPB 200 for a few years and now a new 400cx I can definitely say that the new Krell is improved over the old sound. Compared to to the 200 the sound is more open with better bass extension and control. The new amp seems to be more dynamic and open across the spectrum with more life. The top end is better as well and not so shut in. I also noticed more detail and transparency with the new amp. Stuff is floating out of the recording that I just did not notice before.
