Original radio modification

I had by Barracuda stock AM radio converter to 4 channel 200W AM/FM with RCA input jacks for the auxiliary. I got an I-phone X RCA patch cable and run my music through the system that way. I used the front speaker mount that a member sells here with two 3 or 4" speakers and 2 6 X 9's in the back and it serves me well. I did the same conversion to my Comet 1 of 1 radio as well. As I remember I used Tayman Electrical in Florida to provide the conversion. I did not use any aux amplifiers or woofers.