[Baby Dave]

I have the Alpine upgrade fitted to my car but every couple of weeks the front left speakers will stop working. The car had the system fitted at the dealers and so far it's been back 10 times. The dealer cannot find any proplems. The first time it went back a loose wire under the seat showed up. This was followed the next time by a faulty mid range speaker. Since that the car won't show any faults yet the sound goes off and comes back on again. This is driving me mad. Anyone any ideas before I rip it all out and use the cable to string up the whole service dept