I searched a bit and couldn't find an answer so, here's my question.

I have awful radio reception in my car. I have the manually retractable, front right fender mount antenna.

I have replaced all 4 speakers, the wiring between the speakers and the radio. The wiring between the radio and the antenna, and I even replaced the manually retractable antenna with a NOS one from DMCMW.

I still have terrible reception. The radio is original to the car, could it be causing the reception issue?

Anything else I'm not thinking of? TIA