Terz,

I have always added six feet to my sub's actual distance, but I'll give three feet a try as Jake suggests (he's the sub guru). I originally recomended that you leave it as is because if you go making several changes at once, you'll end up chasing your tale. Make small changes, and only one at a time.

I've been playing around with the manual EQ set up and think I have it set up about as good as it can be, but I've been tweaking things slowly, and keeping track of what the sonic differences have been.