Speed of Sound Audio Experts delivers a complete GMC Canyon audio upgrade with deep bass and factory-radio integration. This build features a custom under-seat, down-firing dual 10-inch Ground Zero subwoofer install, Kenwood 5-channel amplifier, DB Drive speaker upgrades, dash tweeters, and 6×9/6.5 door speakers. Using a Wavetech LOC, we achieve a clean factory radio audio upgrade—trusted truck audio experts in New Hampshire.