So I took my system out of my old trep and put it in this one. The system has been working flawlessly for the past month or so until yesterday. I have a 4 channel amp that runs my front door speakers and rear speakers. Now the passenger rear speaker crackles from time to time when I hit a bump. When I am not moving I can crank it up and it works fine. I took apart the car and checked the wires on the speaker. They seem fine I moved around the rcas they seem fine. Anybody have any other ideas. I don't think it's the speaker since it only cuts when I hit bumps and works fine any other time ?