@chronicle... I went from a trouble-plagued but highly regarded class a/b amp that weighed 64 lbs and was rated at 150 watts/channel to my Arion, rated at 500 watts/channel. In my case, this was no compromise for lighter weight. Dynamics, soundstage and especially neutrality all improved significantly. Best of all, a lower-treble/upper-midrange peak that could get nasty disappeared. For years, I thought it was from my room or my loudspeakers. But it was my "liquid sounding" Class A/B amp all along. I have been digging my system with the Class D Arion amp for over a year now. Absolutely love it. I am fairly sure I could not beat it for the money.