725 Monos are out. 28K. Much more natural and musical than Krell. Bass is very good!Hear it with a top tier pre. I suggest either Korus or Criterion from Rowland. I own the Criterion. Super nice pre. Also have the stereo 625. I need/want a bit more power,dynamics and low level detail so I'm awaiting the 725 Mono amps. I have a few respected ears I know who have heard them and say way way good.