Got my 1500, tape player plays the music on the quick side, not super fast but a 3:30 song will play in about 3 minutes. It also comes thru the speakers a bit rough. I read somewhere that you can adjust the play speed, but looking into the open guts I need something to show me where this adjustment screw might be. The manual just has basic install of radio and speakers. Anyone know where I can find something more specific to help out with that?