I've talked to the sound contractor who built this 12" box and he knows what he's doing. For $119 anyone who wants some major low end in a compact package could make out pretty good. This scoop uses the JBL 2204H which is a long excursion woofer that has pretty smooth response up to beaming limits for a 12. About a third down the page at Bass Northwest, Brownell Sound 112 (8 ohm) - looks to be around 16 or 17" wide and 24" tall. Call BNW and they'd likely be happy to measure it for you.