[astock06]

i have an 07 300c and all i had was the factory radio with 6 BA speakers. no mention of an amp was on the window sheet, however it is there. i took my dash apart yesterday and the amp is in there but its hiding behind a black bbox that says siemens. if you have the BA syytem you must have the factory amp. i heard the same thing about some of them not having it but i think that is just do to people not looking hard enough. it took me about an hour to finally find it. with that said, i went a little different route. i bought the metra chto-01 adapter that plugs into the d3 and the factory radio harness plugs right into it. you dont even need to connect anything to the amp. on the chto-01 there are 4 rca's....purple,green,white and grey. theses rca's connect right into the d3's rca's. the green and purple connect to the front speaker output rca's that come out of the d3. the white and grey rca's connect to the rear speaker outputs. check those first b/c i may have said those backwards. but that was it. i thought i was going to have to pluug something into the factory amp and that is why i was looking for it but you dont even touch the amp doing it this way.....ill put pics of later. hope this helps