Is it normal to hear some echo sound sometimes from stock Boom audio unit on 2015 Road Glide special? It has been flashed to the newer firmware. I keep seeing here that other people are swapping their head units out cause they don't seem to like them. What I would like to do is add 2 speakers in my bag lids and have an amp added. Nothing real fancy but better than what it sounds like now. Suggestions please. Also what kind of speakers come stock in the fairing on this model? TIA