I also like to listen to music while driving - I have a set of moulded earplug speakers from my motorbike days which just screen out the wind noise so one still hears all the necessary things as well as having a low volume of music. I wired a 3.5mm socket to the rear speaker outlet of the radio - my morgan only has front speakers. By turning the bias to the rear output, one has all the benefits without blasting out the music to the world!
Works for me!
Cheers!
