people have speakers around here all the time on Harleys. They have to absolutely blare the stuff, but you would be shocked how often you come across bikers with speakers on their bikes.
Yes..."bikers" often do have speakers. Motorcyclists seldom do. I've been riding for 48 years, belong to the Iron Butt club, and led a club of over 100 members. I put more miles on two wheels in a year than on four. Seems like the stereo systems are generally on the "geezer glides" that get about 500 miles a year on them on bar runs. This is not always the way things are but generally it's the way things are...posers vs. riders.