I hooked up my Yamaha to my upstairs speakers which happen to be m3's. Yep, it has to be the receiver. I always prefered the sound of the m3's to the axioms in my main system but after hooking up the yammy they don't sound as good.

No, it's not a DSP mode or anything like that. I tried those along with trying to tweak everything I could think of (constant eqing was driving me nuts).

On one hand it's frustrating to know that the whole time I was trying to tweak things to make them sound better it was my expensive receivers fault but at the same time I am very happy to finally have a great sounding system. I was ready to go to sleep last night when I started playing Tool's new album and it sounded so damn good that I had to listen to the whole thing.