I have the Empeg and a Sony cd/mp3 player installed in my car.....i sold my tuner module for a nice gain so the real reason was to access the tuner in the sony (had the sony before the empeg)...it is much better than the Empeg tuner so i was not disappointed...i run the line outs to the aux in on the empeg.....although i can play cd's..i rarely do.....but..i would like to have the option of runing the sony when the empeg is going through some housekeeping chores...but that is not a priority!