My sub was fine but after watching Spiderman, it would not turn on. I checked the fuse (blown), replaced it and it blew again, and again. I decided to do some investigation. If I unplug everything after the transformer, the fure does not blow. As soon as I hook in the power supply, it blows, even with no load. Looks like I need another power supply for this PSB Subsonic 6. I wish I had the money for a decent sub.