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Product details

Advanced Specifications

  • Speaker Size: 6.5”
  • Speaker Type: 2-way coaxial (PRO series)
  • Magnet Type: Neodymium
  • Amplifier Power Output: 800W total (SounDigital EVOX platform)
  • Amplifier Channels: 4-channel
  • Wiring Type: OFC (oxygen-free copper)
  • Signal Input: High-level (via LOC to RCA)
  • Integration Type: OEM head unit retained
  • Fitment Type: Direct fit (no pod modification required)
  • Weather Resistance: Yes (speaker design)

*See document links below for full technical specifications.

Key Features
  • High-output speaker design for stronger projection at highway speeds
  • Neodymium motor structure improves efficiency and power handling
  • Direct-fit installation without modifying factory speaker pods
  • System tuned for increased midrange presence and cut-through
  • Acoustic treatment improves control and reduces distortion at higher volume
Compatible Touring Models
  • Street Glide models (2014–2023)
  • Street Glide Special models (2014–2023)
  • Ultra Limited models (2014–2023)
  • Ultra Classic models (2014–2023)
  • Electra Glide Standard models (2019–2023)
  • Road Glide models (2015–2023)
  • Road Glide Special models (2015–2023)
  • Road Glide Ultra models (2016–2023)
  • Road Glide Limited models (2020–2023)
Best Suited For
  • Riders running louder exhaust systems needing stronger front-stage output
  • Touring bikes used for highway riding where projection is critical
  • Users prioritising volume and presence over a softer tonal balance
  • Installers or DIY users wanting a high-output system without custom fabrication
Why Choose OSCA Harley Kits

This kit is built for real-world Harley conditions where standard upgrades fall short, particularly on bikes with louder exhaust setups. The PRO-series speakers are designed to project harder and stay composed at higher volume, delivering usable output and clarity where it actually matters, on the road.

Like all OSCA Harley kits, this system is built around proper component matching rather than inflated specs or generic combinations. Every part is selected based on how it integrates within the signal chain, how it fits the platform, and how it performs once installed. The result is a system that delivers consistent, predictable performance with minimal guesswork.

Installation Notes
  • Direct-fit speaker design (no modification to factory speaker pods required)
  • OEM head unit retained using line output converter for signal integration
  • Ignition T-harness provides switched power without cutting factory wiring
  • Amplifier mounting solution may be required depending on bike model
  • Acoustic treatment should be applied to inner fairing and speaker pods for best results
  • Proper gain structure is critical to prevent distortion at higher output levels
  • Electrical system condition (battery/charging) should be checked for high-output setups
  • Professional installation recommended for optimal performance
Load video:

Installation Guide

This video shows the general install process used across our Harley audio kits, including amp integration, speaker replacement, and wiring.

It’s provided as a guide only. These systems require experience with wiring and Harley fitment, so we don’t recommend attempting installation without the proper knowledge or skill level.

Music You Can Hear at 110km/h

Designed specifically for Harley-Davidson motorcycles, our audio upgrade packages are engineered to deliver clear, powerful sound at highway speeds. Tuned to cut through wind, exhaust, and road noise, each system balances output, clarity, and durability for real-world riding. Every package is purpose-built for the Harley platform, ensuring seamless integration, reliable performance, and music that stays present and controlled—whether cruising through town or riding hard at 110 km/h.

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IMPORTANT: Installation & Tuning Considerations

  • All systems require a flash tune of your Harley Davidson ECU to change the source radio output voltage and modify the internal EQ curve to the appropriate settings before installation. This is available as an optional extra from Old School Car Audio here in Perth, or your experienced Harley Dealer.
  • Warning - Amplifier gain settings need to be professionally set to protect speakers at higher power ratings.
  • Consider future proofing your system by installing the 4-channel amplifier version with the DSP, in case you want to upgrade to the 4-speaker kit in the future.
  • All DSP settings need to be measured and setup utilising a professional Real-Time Analyser (RTA). This is available here at Old School Car Audio in Perth, for the ultimate sound experience on your Harley.
  • Modifications to speaker pods are required to fit the GZCF 6.5SPL speakers.
  • Contact us for more specific information on your motorbike and a customised quotation.

Old School Car Audio Workshop

To ensure reliable set-up and accurate performance from our packages, professional installation and DSP tuning are strongly recommended. Our dedicated workshop in Perth specialises in high-performance motorcycle audio, ensuring precise fitment, safe amplifier setup, and accurate acoustic tuning. Speak with our team to discuss installation options tailored to your Harley.

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