Guys, I'm having a problem with my mach 460 stereo. Here is my problem: All four subwoofers just stopped working while I was driving yesterday. Today, they popping on and off once. I have no idea what happened. Here is what I checked: I checked both radio fuses, the high current one and low current. I checked all the wiring and it was fine. I even pulled out both amps (NOT fun at all) from the trunk and opened them up. Nothing was burnt up on the inside. I'm clueless. The Mach system more than satisfied my radio requirement, so I don't want to upgrade to anything. (I don't like those loud systems with booming bass) Any ideas?