It's a basement that opens up to upstairs from the back of the room. Not sealed, unfortunately. The VTF-15H is up front, about 13' from the LP. The VTF-3 MK3 is nearfield, used as an end table at the LP. Woofer pointed into the chair.
A couple of weeks ago somebody posted that The Flight of the Phoenix (2004) BD has incredible LFE and can let a Hsu sub really strut its stuff. As I remembered how bad the film was dramatically, I hadn't seen it since it first came out on DVD over 5 years ago but decided to rent the BD and check out the HD sound track. I'm glad I did. My VTF-3.3 Turbo had my HT room shaking from the beginning of The Flight of the Phoenix until the end. In fact, the over all sound design was brilliant. The background music was beautiful and the various storms, explosions, gunshots, and airplane sounds were riveting. It's a shame all of that was wasted on such a dumb movie. Still, if you have an excellent to outstanding HT audio setup, check the BD of this movie out, you won't regret it.