Step by Step Installation of Hertz SX690NEO Speakers with Cut Kit on a Harley Davidson Streetglide - YouTube
Hertz Stage 4 SV165NEO & SX690NEO Motorcycle Speakers With Precision Power MAA4.400 Plug & Play Amplifier with SoundStream Reserve Radio For 2014-2022 Harley Davidson® Road Glide – Volunteer Audio
My Harley-Davidson Street Glide gets an Hertz Audio Upgrade! - YouTube
Second Speaker Upgrade for Wilkes Barre Harley Street Glide