my internal pre-amp is shot, so i tried to fix it. with no luck, i took it to someone at a shop. He told me to find out the type of pre-amp it uses, so i called my retailer. they cant help me, as usual =/ so the question is, does anyone know what kind of pre-amp it uses or where i can find a replacement part? all it says it " 2 band EQ - G&B co. " thanks in advance!!