Well, after spending ages playing with the tuning of my PB2-isd, M60s and Denon 3805 this is the best I can do.

http://members.cox.net/al1en/Sub_Tuning.pdf

I didn't realize until today that the Direct Mode did not high pass the mains, duh!

It would be nice if I could get a little flatter response, but I guess that is down to room acoustics. I have tried every possible sub placement and this is the best.

Oh no, I can feel some more experimentation coming on!

Dave

Any thoughts regarding my 80hz dropout from the main speakers? Could this be due to the 22" placement from the rear wall?

Actually moving the M60s back so that they are 19" from the rear wall removed the flat spot at 80hz. Go figure.

It's amazing what 2" of movement can do for the sound quality of the M60s.

What test DVD are you using? Avia?

I just created some -20dB test tones via Sound Forge at the frequencies I wanted - 125, 100, 80, 63, 50, 40, 31.5, 25 & 20hz - so that I had a constant signal to measure against. All of my test CDs etc have sweeps so it is impossible to get accurate readings.

Dave