Yes, more info and impressions of your IB
I'm seriously considering building one on my soon-to-own home basement.
My basement is about the same size as your HT room: Are two drivers plenty? I’ve read the FAQ on the ‘IB cult’ site, It says that the preferred location for the baffle is the front wall. How’s the front side wall working you? That’s the same location I would have to use for mine. Are you using a BFD (Behringer sp) EQ?
TIA,
Jaime

The sailor does not pray for wind, he learns to sail. --Lindborg