Rockford Fosgate HD24-STG3 6.5"/6x9" Harley Audio Kit

The Rockford Fosgate HD24-STG3 is a Stage-3 amplified audio upgrade for select 2024+ Harley-Davidson Touring motorcycles with Skyline OS. It combines upper-fairing and saddlebag speakers with a dedicated four-channel amplifier, addressing the limited output and coverage of a basic motorcycle audio setup. The kit is designed as a coordinated system rather than a collection of separate components.

This package is intended for Road Glide and Street Glide riders seeking fuller sound coverage at highway speeds. Two 6.5-inch fairing speakers handle the front soundstage, while two 6x9-inch speakers add output from the saddlebag area. Both speaker pairs use 2-way designs and are rated for 150 watts RMS per speaker.

The system is voiced for open-air motorcycle listening, with long-throw woofers and extended low-frequency response intended to support stronger bass and midrange presence. Heat-resistant motor structures and radiator-ring cooling are used to manage speaker heat during demanding use. The result is a balanced, high-output platform built for riding conditions rather than an enclosed vehicle cabin.

Its included TMA-1000X4i amplifier uses direct A2B digital integration with compatible Harley-Davidson Skyline OS infotainment systems. The amplifier includes DSP processing and Bluetooth connectivity for RF Connect app setup, including loading a tune matched to the audio kit. Gain and crossover settings can also be adjusted digitally through the app.

The HD24-STG3 is designed to provide an upgrade path as well as a complete four-speaker system. Its four-channel amplifier supports up to eight-speaker audio systems when expanded with compatible components. The supplied installation hardware, grilles, wiring, amplifier mounting components, and saddlebag cut-in kit keep the main equipment matched for a single-system installation.

Key Features

• Four-Speaker System: Includes two 6.5-inch fairing speakers and two 6x9-inch saddlebag speakers.
• 1,000-Watt Amplifier: Four-channel digital amplifier provides dedicated power for the included speaker system.
• Skyline OS Integration: Direct A2B connection works without factory-radio flashing on compatible motorcycles.
• RF Connect Tuning: Bluetooth app control loads DSP tunes and adjusts gain and crossover settings.
• Element Ready Construction: Components and harnesses are designed for water, dirt, UV, and vibration exposure.
• Expansion Capability: The amplifier supports compatible systems with up to eight speakers.

Design & Installation

The HD24-STG3 uses motorcycle-specific components made for exposure to vibration and weather. The speakers use carbon-filled curvilinear poly cones, Santoprene VAST surrounds, Poly-Nomex spiders, reinforced composite baskets, and neodymium motor assemblies. The amplifier has an IPX4-rated Element Ready chassis, an extruded-aluminum heatsink, and a compact form factor for motorcycle installation.

The kit includes model-specific fairing grilles for 2024+ Road Glide and Street Glide applications, saddlebag grilles, a bag-lid cut-in kit, amplifier mounting hardware, and a plug-and-play wiring kit. It is intended for select 2024+ Harley-Davidson Touring motorcycles equipped with Skyline OS; confirm motorcycle fitment, factory-audio configuration, and saddlebag type before purchase. Rockford Fosgate lists typical installation time at approximately five hours.