All this talk of tuning sub signals for the room looks interesting. I tuned my sub for my last house using test CDs and a cheap SPL meter, but just using the sub's bandwidth and cutoff controls. Somehow, I'd like to do better this time around
If anyone's interested,
this is the sub I had designed and built, by Kyle Richardson, of Acoustic Visions. I am extremely satisfied with it, for the sub-$1000 (at the time) price.