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More Output and Bass for the Road. Rugged, Compact & Powerful

Powerful, yet compact, audio amplifier kit designed for use on Harley Davidson motorcycles.

The HD4SPSYSTEM  includes everything you need to take your 1998-2013 Harley Davidson sound system fromStock to Rock!

PRICE:  $ 599.95    $639.75 

Compatible with 1998-2013 Ultra Classic, Electra Glide, Street Glide, Tri Glide, Road Glide, and Road Glide Ultra models. (Standard saddlebag lids only).

The MTX MUD100.4 is a compact amplifier designed to fit inside your motorcycle's fairing. This unit features full range class D topology that delivers exceptional sound quality and excellent thermal efficiency. The unit includes 4 channels that are capable of delivering 100 watts of RMS power per channel, more than enough power take our bikes sound system to the next level. The front channels are designed to power upgraded speakers in your fairing while the rear channels can power upgraded speakers in your tour pack. 

Amplifier * 4-Channel 400-Watt Motorsports Amplifier

Speakers * 6.5 inch 2-Way 60W RMS Coaxial Speaker Pair

Stock to 6.5" Adapter * 5.25" to 6.5" Speaker Adapters

Speakers for Tour Pack * 5.25 inch 2-Way Coaxial Speaker Pair

Harley Davidson Wiring Harness *  Includes the wire, fuse, fuse holder and fittings required to connect your amplifier to your vehicle's electrical system.


Key Features

  • Complete System For Replacing Factory Speakers in Harley Davidson Motorcycle Fairings
  • Compatible with 1998-2013 Ultra Classic, Electra Glide, Street Glide, Tri Glide, Road Glide, and Road Glide Ultra Models
  • Uprade Existing Fairing Factory 5.25" Speakers to 6.5" Speakers for Increased Output
  • Compact Design Enables Installation Anywhere
  • Conformal Coated Printed Circuit Board that Resists Moisture
  • Fixed Crossovers, High and Low Pass Allow Use with Full Range Speakers or Subwoofers
  • Amplifier is Weather Resistant in Accordance with IP66 Rating
  • Speakers Deliver Extended Low Frequency Response
  • Wiring Harness Integrates Directly with Factory Wiring and MUD Amplifier for Easy Installation

Easy Installation

Included in the kit is a pair of adapter rings that allow you to upgrade the fairing 5.25" factory speakers to 6.5" speakers that deliver higher output levels and deeper bass and as well as a pair of upgraded 5.25" speakers to replace the factory tour pack speakers . The HDWH4 wiring kit allows the MUD amplifier to be integrated into the factory wiring making installation easy without having to cut into any factory wiring ensuring your warranty stays intact.

Riders that own a Road Glide or Road Glide Ultra will also need the RGBRACKET that is a custom bracket for mounting the MUD100.4 inside the fairing using existing factory mounting holes.

The Sound of  Performance

For SPECIFICATIONS Follow this link