Reading your post pissed me off. What the hell is the matter with people? Not every aspect of one's life should require a personal soundtrack. Do they blast music while out fishing on a quiet lake as well? As for the bolded part, I don't think you'd look like a jerk for asking them to turn it off, that's being pretty darn polite. I don't even think you'd be a jerk for saying turn that crap off right now. Unfortunately this has become a thing in golf over the last 5 years or so. They even advertise speakers made specifically for use on golf courses in golf magazines. I don't get it at all. A large part of the enjoyment of golf, for me anyways, is the serenity and nature. I have been golfing for over 40 years now and I have just noticed a general lack of awareness or courtesy for others within 4 somes as well as all others on the course (as noted bybjkrautk). Like having non-quiet conversations while others are hitting, parking carts or leaving bags in front of the green (instead of closer to the next tee), and low awareness of playing slow. All of these use to be widely accepted golf protocols that experienced golfers followed and passed along to inexperienced golfers. Not really the case anymore. I would say that its a generational thing, but not necessarily the case. Several of the guys that are playing music in our league are my age or even older.