If you want to see where shallow subwoofers are heading in the future, just look at where the SI BM mkIII is today. At only 3.4" of mounting depth, 14mm of Xmax, a miniscule 0.5 ft^3 enclosure requirement, and 450 watts of power handling, the BM mkIII has a big subwoofer attitude in a shallow package. Virtually every part of the BM mkIII has been custom tooled to provide you with a shallow subwoofer with the best performance possible. It has an XBL^2 motor, a 10” diameter Nomex spider, a two-piece flat diaphragm, and a 10 ring neo radial motor. Click on the Subwoofers link above to see more about the most linear shallow subwoofer on the market.

