We are a Rockford Fosgate authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
The Rockford Fosgate HD9813SG-STG2 4-channel amplifier is built for riders who want serious, clean output without stressing the bike. With up to 100 watts RMS per channel, this M5-800X4 amplifier delivers strong, controlled power straight to your fairing-mounted speakers. It is designed to stay stable under real riding conditions, giving you punchy volume and clarity whether you are cruising or pushing highway speeds. The factory-fit system even includes TMS6SG coaxial speakers, so you get a complete upgrade with crisp mids, tight lows, and detailed highs right out of the box.
This amp is not afraid of the road. Element Ready engineering with IPX6-rated protection, marine-grade sealing, and corrosion-resistant hardware keeps everything safe from rain, dust, vibration, and harsh UV exposure. It is made to live inside a motorcycle environment, not just a clean garage setup. The heavy-duty 8-gauge oxygen-free copper wiring and fused power distribution also make installation cleaner and more reliable, so your system stays solid even when the ride gets rough.
Inside, the Class-AD amplification design gives you strong output while reducing strain on your motorcycle’s charging system. That means more sound without draining power unnecessarily. MEHSA 4 thermal management keeps temperatures under control, while DSM precision circuitry reduces noise and improves signal clarity for a cleaner listening experience. With CEA-2006 verified ratings, you also know the power numbers are real, consistent, and repeatable, not just marketing claims.
What makes this system stand out is how easy it is to dial in. The CLEAN gain calibration system uses built-in clipping indicators so you can set levels accurately without special tools. Add flexible crossover controls with high-pass, low-pass, and full-range options for front and rear channels, and you get full control over your sound staging. Whether you want aggressive highway volume or balanced cruising audio, this system lets you tune it exactly how you like it while keeping everything distortion-free and tight.
Features:
Specifications:
TMS6SG
M5-800X4
RFK-HD9813M5
We are a Rockford Fosgate authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
The Rockford Fosgate HD9813SG-STG2 4-channel amplifier is built for riders who want serious, clean output without stressing the bike. With up to 100 watts RMS per channel, this M5-800X4 amplifier delivers strong, controlled power straight to your fairing-mounted speakers. It is designed to stay stable under real riding conditions, giving you punchy volume and clarity whether you are cruising or pushing highway speeds. The factory-fit system even includes TMS6SG coaxial speakers, so you get a complete upgrade with crisp mids, tight lows, and detailed highs right out of the box.
This amp is not afraid of the road. Element Ready engineering with IPX6-rated protection, marine-grade sealing, and corrosion-resistant hardware keeps everything safe from rain, dust, vibration, and harsh UV exposure. It is made to live inside a motorcycle environment, not just a clean garage setup. The heavy-duty 8-gauge oxygen-free copper wiring and fused power distribution also make installation cleaner and more reliable, so your system stays solid even when the ride gets rough.
Inside, the Class-AD amplification design gives you strong output while reducing strain on your motorcycle’s charging system. That means more sound without draining power unnecessarily. MEHSA 4 thermal management keeps temperatures under control, while DSM precision circuitry reduces noise and improves signal clarity for a cleaner listening experience. With CEA-2006 verified ratings, you also know the power numbers are real, consistent, and repeatable, not just marketing claims.
What makes this system stand out is how easy it is to dial in. The CLEAN gain calibration system uses built-in clipping indicators so you can set levels accurately without special tools. Add flexible crossover controls with high-pass, low-pass, and full-range options for front and rear channels, and you get full control over your sound staging. Whether you want aggressive highway volume or balanced cruising audio, this system lets you tune it exactly how you like it while keeping everything distortion-free and tight.
