I've been an M&K convert for about four years after trying dozens of other combinations. Using the speakers the studios use to make their movies on makes sense to me. For years I thought the MX350THX blem away everything else until a dem last week when I heard the new M&K studio sub. This puts every other sub I've heard to sham. Unfortunately I had to go to St Albans to hear it but the dem was worth the travel. It sounded awesome in a huge room. I've ordered a 5100, if you want to hear the best, check one out!