Just for shits I checked on u tube to see if anyone is running a BT 4180 and the Hertz on a road glide and there is. Sounded really nice. Iím not sure on your install on the tweeters, lm running BT 7.1 speaks in the fairing, 6.5 in my lowers and 6x9ís in the lids. My scooter is a 2011, I have the BT 4180 and 2180 mounted up behind the glovebox on both sides. I used heavy duty commercial Velcro. I have had the fairing off a few times and the amps have never moved. Check out u tube I think you will be pleased with what you hear. And Iím sure it sounds even better in person.