Diamond Audio 1998-2013 Harley-Davidson 5.25" to 6.5" Speaker Adapter Rings PN. DHDMCA The Diamond Audio 1998-2013 Harley-Davidson 5.25" to 6.5" Speaker Adapter Rings is designed to support a cleaner, more reliable installation while helping your audio components perform as intended. It is built for fitment, protection, or connectivity depending on the application, making it a practical upgrade for custom or replacement installs.Features & Benefits: Improves installation quality and helps maintain a professional finished result. Designed for compatibility with matching Diamond Audio components or vehicle-specific applications. Helps protect equipment, simplify mounting, or improve connection reliability depending on the product. Built to support long-term durability in mobile, marine, or motorcycle environments. A smart accessory choice when upgrading, replacing, or refining an existing system.