My husband and his friend installed stereo ,amp,subwoofer last year. Two weeks ago all of the sudden I noticed I wasn't thumpin'. I made sure wires didn't get hit and pushed off (kinda wiggled them too) fuses aren't blown . It worked for a few minutes and then quit again and still not working and no one has time to look at it. Is there something I can actually do fix it? I have 2 12" subs in the back. I noticed after a friend drove the car that all bass stopped. The fuse on the mtx amp was blown. I replaced it and one sub works just fine and the other seems to buldge out when on. Like its pushing out. When it goes off it goes back. I disconnected it for now. Is it blown?

Car Audio & Video - Lightning Audio - B1.10.4 Car Subwoofer