BG's THX-Certified In-Wall Subwoofer Impervious to Wall Construction
One of the bugbears of mounting speakers—and especially subwoofers—in a wall is that the drive-unit behavior depends on the less-than-rigid behavior of the sheetrock. Most manufacturers of architectural speakers get around this by using a back box to provide the correct acoustic loading. THX's Laurie Fincham (who is going to hate me for referring him as one of the grand old men of English audio) had a different idea.