Take your ride to the next level with a Harley-Davidson audio upgrade from Speed of Sound Audio Experts in Somersworth, NH. Featuring Ground Zero motorcycle speakers, JBL marine amplifiers, and professional motorcycle amp wiring cleanup, this custom motorcycle sound system delivers unmatched clarity and power. Whether it’s Harley tour pack or fairing speakers, enjoy a clean, powerful, and perfectly tuned Harley sound system upgrade built by true Harley audio experts.