2-3 Weeks. 45 Day Lowest Price - 100% Satisfaction Guarantee. The BM12S will support the most demanding circumstances in stereo and multichannel monitoring. Intended for challenging users and setups, this sub will come in handy when the going gets tough. With the substantial amount of power coming from the 12" woofer and an impressive low frequency limit of 18 Hz, this subwoofer is the perfect match for the BM and M range. As with all other products from Dynaudio Acoustics, the BM12S is designed for longevity and optimum performance.