Step away from the analog sliders. I'm talking about processing in the digital domain, as is done in the EQ functions of the new AVRs. I don't advocate going back to 1980 and grabbing some noise sliders. We all want a pure signal, but the whole discussion assumes something needs to be changed in your listening environment. Some room issues can't be changed (for any of a number of reasons). At that point, I'm just saying modern EQ functions in HT are behind the times, but catching up.

Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire