I just upgraded to a HK AVR520 from my AVR65 and I must say the sound is much crisper. The AVR65 is an excellent receiver but I found myself adjusting the volume up and down much more. My question is this - on the 520 I put the volume level much lower (approx. 10 db) then I did with the AVR65? I'm not an expert but I would have expected it to be the other way around. Can anyone explain this?