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76001377 Audio by Rockford Fosgate Secondary Subwoofer Kit

Fits: Fits '23-later FLHXSE, FLTRXSE, '24…
Fits '23-later FLHXSE, FLTRXSE, '24-later FLHX, FLTRX, FLTRXSTSE, '25-later FLHXU and '26-later FLHXL, FLHXLSE and FLTRXL models systems equipped with Harley-Davidson Audio powered by Rockford Fosgate. Requires separate purchase of Secondary Amplifier P/N 76001444 and Secondary Amplifier Installation Kit P/N 76001302, and Secondary Subwoofer Installation Kit P/N 69203434, and Primary Subwoofer P/N 76001376. IFCU software version 4125-later & Amp Software version 1540-later is required for activation.
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Stock updated: 10 Apr 2026
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Estimated delivery: 3–15 working days

Part #: 76001377

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Specifications

Brand
Harley-Davidson Accessories
Part Number
76001377
OEM Reference
Pack Quantity
Each
Category
Electrical
VAT Rate
20%

About This Product

The deep bass will turn heads when you roll up playing your Harley-Davidson Audio powered by Rockford Fosgate Subwoofer Kit. Designed for Touring bikes equipped with Harley-Davidson Audio powered by Rockford Fosgate audio and Skyline OS, these plug-and-play 10-inch subwoofers enable heart-thumping bass while cruising around the city streets or out on the open road. Can be installed as a single subwoofer or a dual subwoofer set. Create a dual woofer system that provides as much big bass sound as you want.

- This dual subwoofer setup provides a +4-6 dB improvement in bass frequencies compared to our previous subwoofer offering

- All new 10" Subwoofer features ultra-premium neodymium magnets for increased performance and durability

- Entire subwoofer enclosure may be removed without tools when space is needed in the saddlebags. Included saddlebag cover panel protects saddlebag contents when subwoofer is removed

- Plug-and-play design is easy to install and to remove when desired. Initial activation performed through Skyline OS speaker configuration screen.

- Subwoofer(s) offer an exclusive Auto-Detect feature which enable automatic tuning adjustments to your sound system based on your specific Harley-Davidson Audio powered by Rockford Fosgate configuration

- Exclusive Subwoofer Gain Controller activation on Skyline OS, allows customer the ability to increase or decrease subwoofer output as desired using a slider scale within the infotainment screen

- Harley-Davidson Audio powered by Rockford Fosgate branding on subwoofer and subwoofer enclosure

- Power Lock cut-out enables installation in CVO models with power saddlebag locks and maintains that security

Manufacturer part number: 76001377.

Fitment

10 models

Fits '23-later FLHXSE, FLTRXSE, '24-later FLHX, FLTRX, FLTRXSTSE, '25-later FLHXU and '26-later FLHXL, FLHXLSE and FLTRXL models systems equipped with Harley-Davidson Audio powered by Rockford Fosgate. Requires separate purchase of Secondary Amplifier P/N 76001444 and Secondary Amplifier Installation Kit P/N 76001302, and Secondary Subwoofer Installation Kit P/N 69203434, and Primary Subwoofer P/N 76001376. IFCU software version 4125-later & Amp Software version 1540-later is required for activation.

Cvo/Custom
3 models
Brand Year Model
Harley-Davidson 2023–2025 CVO STREET GLIDE (FLHXSE)
Harley-Davidson 2023–2025 CVO ROAD GLIDE (FLTRXSE)
Harley-Davidson 2024–2026 CVO ROAD GLIDE ST (FLTRXSTSE)
Touring
7 models
Brand Year Model
Harley-Davidson 2024–2026 STREET GLIDE (FLHX)
Harley-Davidson 2026 STREET GLIDE LIMITED (FLHXL)
Harley-Davidson 2026 CVO STREET GLIDE LIMITED (FLHXLSE)
Harley-Davidson 2026 CVO STREET GLIDE (FLHXSE)
Harley-Davidson 2025 STREET GLIDE ULTRA (FLHXU)
Harley-Davidson 2024–2026 ROAD GLIDE (FLTRX)
Harley-Davidson 2026 ROAD GLIDE LIMITED (FLTRXL)

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Who are we? Leeds Harley-Davidson - Iron City Motorcycles

Who are we? Leeds Harley-Davidson - Iron City Motorcycles

This product is fulfilled by Iron City Motorcycles, Leeds' authorised Harley-Davidson® dealer, serving the UK with a full range of Genuine Motorclothes®, dealer merchandise, and official Harley-Davidson parts & accessories — available for UK and international delivery.

From OEM Parts to retro lifestyle wear to aftermarket stockits we have what you need to keep you riding all year round.

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