I'm going to be putting a tape deck and cd changer in my friends 2001 volkswagen golf. he has a stock amp that he wants to use does anyone know if the stock amp is two channels or four? i've looked all through the manual and I couldn't find anything about the amp he said it is the monsoon stereo package if that helps. Also will the stock amp have rca inputs or what, i.e how is it tied into the stock head unit?