I've been pricing around different local shops to get an idea of how much it would be to install a 4ch amp + amp kit. A few places want around $150 which isnt bad. But I went to get a quote from a different shop. They wanted $400!! I asked them why it would cost that much. The guy said that he is going to need to run new wire to the doors and rear speakers since the stock speaker wire is too thin. He said that if i amp the speakers with the stock speaker wire that it will burn the wires up. My amp is a JBL with 104x4rms. Do I really need to spend that much to get all of my wireing replaced????