My wife and I do day long MUP rides. When there are few people on the trail we like to listen to music.
Since I let her set the pace and hang just off her back wheel I have a small portable radio mounted on my handlebars.
I picked up a Sangean DT400W off Amazon. Had a FENIX light mount where the one half clamp had broken. So I made a base out of some plastic sheeting. Used Velcro on the back of the radio and on the mount. Both of us can hear the music while riding but if you move 15 feet from the bikes you hear nothing. That way we disturb no one with our music. The radio has a good reception range.