The BTS (“Between the Sheets”) is our ultra-thin dual alignment bandpass subwoofer designed to mount within 2 x 4 construction. At only 3.5” deep, the enclosure is intended to be fully sheetrocked over with a small exposed port which may be finished with a standard AC grille. The proprietary design is able to energize rooms up to 500 sq. ft., combining the performance of traditionally fully exposed speakers with an “aesthetic minimalism” that clients and designers demand.
The graph below, taken at 1 m, shows linear bass response to -3 dB @ 30 Hz providing nearly 95 dB of output with only 5 watts of input.