Hi, the subwoofer with my Boston Acoustics Soundware XS 5.1 set-up seems to have developed a serious fault (not uncommon I gather). Buying a completely new speaker system is, of course, an option, however I'd like to consider just replacing the sub-woofer in the first instance. Any recommendations gratefully received ! (for info, my room measures 6m by 6m, and my surround amp is a Sony DA1200ES). Thanks.