Man I try to call three or four numbers and not a damn one works, I've been trying to get a hold of Cambridge sound works, so I can ask them a question that's kind of important. My power supply I believe it's going out I started to smell something electrical, and then I started to see smoke so I automatically turn the amplifier off and I unplugged it took subwoofer out and I let it air out, it also blew the fuse so I had to replace the fuse. It wasn't on fire but the power supply looked like it was burnt. But I went ahead and plugged it back up and I turned it on and whenever I turned it on the power supply was making a crackling sound. But I kept an eye on it to see if it was smoking or anything it didn't smoke, so I took the sub and I went ahead and hooked it up, I play music from it and it still works perfectly fine but it just seems like it's not pushing as much power as it was, and now my subwoofer makes a humming sound that it's never made before can somebody please message me back and let me know something I would highly appreciate it.