Hello all,I have an inop. center speaker and almost no bass in my `92 with a stock system.I read somewhere in here that this could be an AMP. problem?My question is;where is this Amp located,and can the local radio repair facility repair this,or do i send it somewhere that specializes in these?Has anyone had this done lately and how much does it cost usually?Thanks everyone,it`s great to have access to you guys!