I recently bought a Mordaunt-Short MS309, but after about 3 weeks it died on me. I changed the fuse in the plug and tried a different plug socket but still nothing. So I took it back to Richer Sounds, who replaced it for me. After about 2 weeks I got exactly the same problem with this replacement. I asked Richer Sounds if they had any other customers with this issue, but they were not aware of any. So I wondering if there is anyone out there who has had problems with this woofer. I got it replaced again, so I hope it's third time lucky for me.