Helix-Diamond Speaker & Amp Combo Road Glide 15+



The Velocity OverDrive Fairing kit is the best sounding and highest output horn-loaded speaker kit available for 1998 through 2013 Harley Road Glides. This kit combines the OverDrive dual-stage horns with stamped steel speaker grills and a set of Diamond MSPRO 65 woofers.

Product Description

This Kit Includes All of the Parts Needed to Add an Insane Amount of Sound to a Road Glide Fairing

The speakers in this kit are a step above everything else available for '13 & down Road Glides. The included 6.5" midrange drivers are optimized for performance in an open fairing and the compression horn tweeters are the best sounding horns we have ever come across. Unlike other similar-looking horns, these horns have a dual-stage geometry that produces far better sound than other horns. It's the best of both worlds. Spectacular sound quality and ultimate sound pressure levels.

Built for Harley Applications

The included speakers in this kit are UV-Treated and very water-resistant. These speakers will endure the harshest conditions for many years.


1998 through 2013 Road Glide.

Installation Notes:

This kit uses the 5.25" factory speaker mount that came with your bike and does not include that part. Requires some assembly. Speaker terminals are standard aftermarket and are not directly plug and play with factory speaker wiring. Made for use with aftermarket amplifiers. A digital sound processor in your system for tuning is highly recommended. The horns in this package are the best sounding horns out there but need to be equalized with a DSP to bring them down to the same level as all of the other speakers on the bike in order to get maximum performance.


  • Velocity Parts 2 Years standard or 3 years if installed by an authorized Velocity Dealer
  • Diamond Audio 1 Year


Extreme Level Performance

Road Glide

  • Loud enough to Wake the Dead
  • Best Sounding Horn Tweeter
  • Upgrades Factory 5.25" Speaker to 6.5"
  • Stamped Steel Grill
  • CNC Machined Horn Mount
  • No Modifications to the Bike Required


  • Size mm (in.) 165 (6.5)
  • Power Handling - Peak W 400
  • Power Handling - Continuous W 150
  • Impedance Ω 4
  • Frequency response Hz 100 ÷ 10k
  • Sensitivity dB SPL 97
  • Voice coil Ø mm (in.) 38,6 (1.5)
  • Magnet Neodymium
  • Cone/Dome Water repellent pressed paper

What's Included

  • (1) Pair of Diamond MSPRO 65 Speakers
  • (1) Pair of OverDrive Dual Stage Horn Tweeters
  • (1) Pair of Stamped Steel Speaker Grills
  • (1) Pair of 5.25" to 6.5" Harley Speaker Adapters
  • (1) Tweeter Connection Wire Kit
  • Speaker Gasket
  • (1) Pair of Passive Crossover Networks
  • (1) Stainless Steel Fastener Set