Randy: James is head of sales and marketing at Bryston
I'm enjoying the PMC XB2 sub I purchased from you. It blends really well with my IB1's. After much experimentation I found the best place for it my room. It's kind of an odd place that's hard to explain in few words, so I'll fill you in when we speak next.
I have one comment and question for you. In terms of the comment, I found a real difference in sound quality when I disconnected my Bryston PP 250's from the rear of my IB1's, and have have them sitting on custom stands behing the speakers. The quality improvement is significant in my view. As such, I'm not sure why Bryston would support the notion of having the PP's connected to the back of a speaker.
In terms of the question, I am wondering about ways to deal with room modes that produce to much energy between 105hz to 140hz? My room dimensions are 20.5' long X 16' wide X 87 inches high. I have positioned my PMC IB1 mains, 6 ft from the front wall and 3.75' from the sidewall to try and deliver a relatively flat response. The primary seating position is about 7' from the rear wall. I have traps in the front corners, behind the screen and on the sidewall at the reflection points. Other than that, I have some diffussion on the ceiling and rear wall. Any advice would be appreciated?
Other question is, am I better to keep my center channel (IB1) where it is (under the screen, 12' from the listening position) or move it forward so that it is the same distance to the listening position as my mains(8.5' from listener)? My concerns are twofold: will my 2 channel imaging performance suffer with the center channel between them? I've heard from some that the time delays built into all processors are not very accurate which would mean I'm paying a reall price for having such a distance disparity in the front of the room for HT. BTW, my processor is the Bryston sp1.7.