Here is my first attempt with my BFD and SVS 25-31. I used Tony Gomez's Excel spreadsheet to 'guess' at initial settings. This is after one hour of playing around. So far I see that I have to fix that 50hz hump and boost 40hz a tad, and the small increase at 100hz. I am happy with the current results considering I've only spent an hour so far. The -20db 'fix' at 40hz has made a huge difference. I am still getting used to the new sound. Suggestions are welcome Note: I wasn't going for +-0 dB, I was trying to add a little house curve in for now until I have time to 'really' do it.