Thanks for your advice, centerline. The radio is a 12 year old GME with no modern ports. The MP4 is a ‘cheapy’ Laser, which I bought for some other purpose originally. It has the earphone jack and an USB port for charging. Rather than throwing it out, I thought it may take the place of bulky CD storage on the boat. I could buy some speakers for it, but it would be nice if I could integrate in the existing set-up. The radio has plenty of FM frequencies which it cannot access, but I wouldn’t have a clue, how to hook it up. Maybe I’ll just leave it as one of my fantasies.