Ken, as much as everyone will argue against it, in my current room I found I needed to run the mains "large" and "LFE+main". (and I have the M80's & EP600) With every other setting, I was unhappy with music. Movies are always great, but music......

Try this, and experiment with the Denon x-over and the sub phase switch again.

Also keep in mind that your other sub may have a mid-bass "hump" that may make it seem fuller near your main's natural roll off, whereas the 500 has a flatter response.

Shawn

Epic 80/600 + M3's + M3 Algonquins + M2 Computer + EP125
I think I'm developing an addiction.