Introduction
Upgrading the audio system on a Harley-Davidson motorcycle can significantly enhance the riding experience, especially when using the manufacturer’s flagship Boom! Audio Stage II system. This guide compiles key installation instructions and considerations for 2014–2023 Road Glide models based on official installation materials and verified user experiences. It emphasizes the importance of proper disassembly, speaker and component installation, and critical system updates to avoid hardware damage. The documentation highlights the necessity of a dealer-performed radio EQ update, the use of specific tools, and torque specifications to ensure a safe and effective installation.
The instructions provided here are derived from official manuals, installation guides, and verified service procedures from manufacturers and Harley-Davidson dealers. Users are strongly advised to read through all provided documentation and, if necessary, consult a certified technician to ensure the system is installed and configured correctly.
Tools and Preparation
Before beginning the installation process, it is essential to gather the appropriate tools and ensure that the motorcycle is in a stable and safe working condition. According to the installation guides, the following tools are required:
- Panel removal tool
- T25 and T27 Torx bits
- 3/16 and 1/8 hex bits
- Ratchet wrench
- Fender cover (for paint protection)
Additional tools may be necessary depending on the specific model and modifications. Users should also have access to the relevant service manuals and installation instructions for their particular model year and configuration.
An important step in preparation is to remove the main fuse from the motorcycle. This is necessary to ensure that no electrical current is flowing through the system during the installation process. The main fuse is typically located in the fuse box, and its removal is the first step in safely disconnecting the electrical system.
Disassembly of the Outer Fairing
The installation process for both the Diamond Audio and Boom! Audio systems requires the removal of the outer fairing and associated components. This step is crucial to gain access to the speaker enclosures and wiring harnesses.
Speaker Grilles and Bolts
- Use a plastic panel removal tool to pry out the speaker grilles from the inner fairing, starting with those closest to the handlebars.
- Remove the T27 Torx bolts located on the outer side of the speakers and at the bottom of the fairing.
- Use a 3/16 hex bit to remove the screw securing the turn signal housing.
Windshield and Fender Protection
- Place a fender cover over the front fender to protect the painted surface.
- Remove the four 1/8 inch bolts that secure the windshield and then remove the windshield.
- The fairing vent can be removed by pulling it straight up to release the retaining clips.
Wiring and Outer Fairing Removal
- Disconnect any wiring harnesses connected to the outer fairing.
- Carefully remove the outer fairing to expose the speaker enclosures and amplifier components.
For models equipped with the factory Boom! Audio system, it is critical to locate the BIN code in the GT radio before proceeding. This step is detailed in the manufacturer’s service manual and is necessary for proper system configuration.
Installation of Boom! Audio Stage II Components
Once the fairing is removed, the next step is to install the new Stage II speaker assemblies, which include both tweeter/midrange and woofer components. These speakers are side-specific and must be installed according to the manufacturer’s specifications.
Speaker Trim Rings and Orientation
- The right speaker trim ring has the text “BOOM! AUDIO STAGE II” located to the right of the tweeter housing.
- The left trim ring has no text.
- Rotate the speaker so that the tweeter is at the top, positioned inboard of the upper mounting hole.
Mounting Screws and Torque Specifications
- Fasten the speaker to the enclosure using the four previously removed screws.
- Torque the screws to 14–20 in-lbs.
- From the inside of the motorcycle, insert the correct tweeter/midrange speaker assembly through the speaker opening in the inner fairing and secure it with three Torx screws.
- Torque these to 9–12 in-lbs.
Enclosure Mounting
- Install one speaker enclosure to the inner fairing using three hex socket screws.
- Torque to 48–60 in-lbs.
- Secure the lower portion of the enclosure to the fairing support bracket with three hex head socket screws.
- Torque to 18–24 ft-lbs.
- Secure the enclosure to the upper support bracket with two hex socket screws.
- Torque to 48–60 in-lbs.
This process is repeated for the opposite side of the motorcycle. Care must be taken to ensure that all components are installed correctly and that all wiring connections are secure.
Amplifier and Wiring Installation
The Boom! Audio Stage II system includes an amplifier kit that must be installed in the saddlebags. This requires some modification to the saddlebag lids and internal compartments to accommodate the new components.
Saddlebag Modifications
- If the motorcycle has not been previously modified, both saddlebags will need to be adjusted to fit the new amplifier and wiring.
- This may involve the use of cutting tools and careful planning to ensure that the internal structure of the saddlebags is not compromised.
Amplifier Connections
- Connect the two-way audio connectors from the amplifier harness to the mid-range/tweeter and woofer connections on the underside of the speaker.
- These connectors are unique and will only fit in one orientation to prevent incorrect installation.
Wiring and Cable Management
- Use cable straps and wire retainers from the Amplifier Installation Kit to secure the wiring inside the saddlebags.
- This prevents potential damage to the wiring and ensures that the system operates reliably under various riding conditions.
Final Steps and System Verification
After the speakers and amplifier are installed, the final steps involve reconnecting the battery, verifying the system configuration, and ensuring that the radio EQ has been properly updated.
Battery Reconnection
- Before attaching the battery cables, verify that the ignition switch is in the OFF position to prevent accidental activation of the audio system.
- Connect the battery terminal branch to the battery terminals, starting with the red positive cable.
- Apply a light coat of petroleum jelly or corrosion retardant material to the battery terminals to prevent future corrosion.
Radio EQ Update
- The radio EQ must be updated by a Harley-Davidson dealer using the Digital Technician II system before operating the audio system.
- Failure to perform this update will immediately damage the speakers.
- The user should ensure that this step is completed prior to powering on the system or testing the audio output.
System Test and Final Installation
- Once the radio EQ is updated, install the main fuse and turn the ignition to the ON position without starting the motorcycle.
- Refer to the BOOM! BOX INFOTAINMENT SYSTEM section of the owner’s manual to verify that all speakers are functioning correctly and that the front/rear fader function is operating as expected.
- If any issues such as buzzing or rattling are detected, check the speaker wiring and ensure that all components are securely fastened.
- Reinstall the outer fairing, windshield, and any other removed components.
Post-Installation Maintenance
- Avoid direct contact with the speaker grilles using a pressure washer, as this can damage the speakers.
- Periodically check all connections and fasteners to ensure that the system remains secure and functional.
Critical Considerations and Warnings
Several critical considerations and warnings must be heeded during the installation process to prevent damage to the motorcycle or audio system:
- Do not power on the audio system before the radio EQ update is completed. This step must be performed by a certified Harley-Davidson dealer.
- Only use the specified tools and torque settings. Over-tightening or under-tightening components can lead to hardware failure or improper installation.
- Verify speaker compatibility. The Stage II speakers are only compatible with 2014 and later Harley-Davidson audio systems. Using them on older systems will cause permanent damage.
- Follow all manufacturer instructions. Each model and year may have slight variations in the installation process, and deviating from the instructions can lead to issues with system performance or safety.
User Experience and System Performance
Several users have reported positive experiences with the Boom! Audio Stage II system after installation. One user, who had their system installed at a local Harley-Davidson dealership, noted that the process took approximately 30 minutes and was handled efficiently by an experienced technician.
The audio performance was described as “outstanding in clarity,” with the only minor criticism being that the system could benefit from slightly more bass. The user also noted that the system has performed well under various weather conditions, including rain, extreme cold, and high heat.
These reports suggest that, when installed correctly and configured properly, the Boom! Audio Stage II system provides a significant improvement in audio quality and system durability compared to the factory audio setup.
Conclusion
The installation of the Harley-Davidson Boom! Audio Stage II system is a complex but rewarding process that can significantly enhance the audio experience on 2014–2023 Road Glide models. The process involves the disassembly of the outer fairing, installation of new speaker components, modification of the saddlebags, and critical system updates performed by a certified dealer. Users must follow all manufacturer instructions carefully, use the correct tools and torque specifications, and ensure that the radio EQ is updated before powering on the system.
By adhering to these guidelines, riders can enjoy a high-quality audio system that is both powerful and reliable under a variety of riding conditions. The Boom! Audio Stage II represents a significant investment in both sound quality and system durability, making it a popular choice for riders looking to upgrade their motorcycle’s entertainment capabilities.