Infinite Baffle anyone?

I recently installed one (infinite baffle, IB, e.g. subwoofer drivers installed between the listening room and another separate (by walls) large space, such as the attic, crawl space, or outdoors), as a test, using an 18' and two long-throw 10" woofer, and as the baffle/front, a door into a storage room.

I turned off my expensive, supposed 17 hz front boxes (two 18" Def Techs, and a larger VMPS).

My gosh, sub 20 hz bass for the first time in my room (measured with velodyne sm-1) AND, I did not expect this, greater clarity and definition from the front end. And the bass overall is the best I've ever heard, anywhere: tuneful, articulate, and, as I've indicated, extended.

It is a revelation! NO MORE BOXES.