Rockford Fosgate HD14U-STG2 6.5" Harley Ultra 4-Speaker Audio Kit

The Rockford Fosgate HD14U-STG2 is a four-speaker amplified audio upgrade for select 2014-2023 Harley-Davidson Ultra touring motorcycles. It combines fairing and Tour-Pak speaker coverage with a dedicated four-channel amplifier for a more capable factory-location system. The kit is designed for riders seeking clearer music reproduction over typical wind, engine, exhaust, and road noise.

This package includes two pairs of Rockford Fosgate TMS65 6.5-inch two-way coaxial speakers. One pair installs in the fairing and the other pair serves the Tour-Pak locations, creating front and rear coverage for compatible motorcycles. Each speaker uses a 25 mm dome tweeter and is built for motorcycle-duty exposure.

Amplification is supplied by the included M5-800X4 four-channel Element Ready amplifier. Its CTA-2006 continuous rating is 100 watts by four channels, while its CTA-2006 dynamic rating reaches 200 watts by four channels at 2 ohms. Adjustable high-pass and low-pass crossovers, Punch EQ, and C.L.E.A.N. clip indicators provide setup controls for the system.

The HD14U-STG2 uses the RFK-HD14M5 amplifier installation kit with Harley-Davidson-specific direct-connect wiring. The supplied T-harness supports front-to-rear fading and includes a loop-through provision for an optional Rockford Fosgate DSR1 processor. A 90-degree harness is also included for Road Glide installations.

This is a system-specific upgrade rather than a universal speaker set. It is intended to work with compatible factory Harley-Davidson radios and requires a factory-radio flash before use. Verify the motorcycle's exact year, model, factory radio, and Tour-Pak configuration against the manufacturer compatibility chart before purchase.

Key Features

• Four-Speaker Layout: Includes two 6.5-inch fairing speakers and two 6.5-inch Tour-Pak speakers.
• M5 Four-Channel Amplifier: Provides dedicated amplification for front and rear speaker pairs.
• IPX6 Amplifier Protection: Helps the amplifier withstand water-spray exposure in motorcycle applications.
• Two-Way TMS65 Speakers: Combines full-range drivers with integrated 25 mm dome tweeters.
• Direct-Connect Harnessing: RFK-HD14M5 wiring is tailored for compatible Harley-Davidson installations.
• Factory Fader Support: The included T-harness enables front-to-rear fade after the required radio flash.

Design & Installation

The TMS65 speakers use carbon-fiber-reinforced polypropylene cones, Santoprene VAST surrounds, neodymium ring-magnet motors, glass-reinforced polymer frames, and integrated spade terminals. Their motorcycle-oriented construction also includes a Santoprene front isolation spider, while the M5-800X4 uses an Element Ready IPX6-rated chassis and sealed harness connections. Included grilles are designed for the applicable fairing and Tour-Pak locations.

Installation uses the supplied RFK-HD14M5 amp kit, mounting hardware, and direct-connect harnesses at factory attachment points on compatible motorcycles. The factory Harley-Davidson radio must be flashed with the applicable Rockford Fosgate calibration before operating the system; failure to do so can damage the speakers. Use the specified amplifier tuning guidance, confirm fitment first, and have an experienced motorcycle-audio installer perform the work if needed.