Should I worry? It doesn't rain here often, however, it can come down pretty hard at times. Are these speakers and the other electronics going to be ok in a downpour?
Copy that. Many Harley dealers provide a complimentary bike wash after having your bike serviced. If their detail person uses a pressure washer (like my dealer), be certain have them protect or avoid any electronics, particularly the handlebar controls. My guy pressure sprayed the handlebar controls and almost destroyed my cruise control electronics! Fortunately, they resumed functioning after drying out.Yes, all electronics are rainproof. Don't pressure wash your bike, and you'll be fine.