Velocity Premium A2B Stage 4 Plug & Play Amp And Speaker Package For 2025 Harley Davidson® Street Glide Ultra Motorcycles Adds Tour Pak Pods

Tired of struggling to hear your factory Harley speakers at highway speeds? Or constantly replacing blown speakers? You’re not alone!

At Volunteer Audio, we understand these common frustrations, and we’ve created a solution that will revolutionize your riding experience. Our Velocity Razor Stage 4 amplifier and speaker system ensures your music sounds incredible, even at highway speeds.

Why Choose the Volunteer Audio Stage 4 System?

• Exceptional Sound Clarity: Our Velocity Razor package delivers powerful, clear audio with excellent vocal detail, crisp highs, and strong midbass, allowing you to enjoy your favorite tunes even at highway speeds.
• Easy Upgrade: Keep your factory radio while enhancing your sound system. Our prewired Velocity Razor Pro amplifier is set up for optimal performance with your factory Skyline OS Infotainment radio.
• Durability: The Velocity Razor Pro amplifier and Velocity Razor Coax Neo speakers are designed for demanding motorcycle audio applications, providing reliable, high-output performance in real-world riding conditions.

What’s Included in the Stage 4 Package?

• Prewired Velocity Razor Pro RZP1500.4 or RZP2000.6 Amplifier: Gains and filters are professionally adjusted specifically for your factory Skyline OS Infotainment radio.
• 1 Pair of Velocity Razor Coax Neo RCN65 6.5” Upper Fairing Speakers: High-output neodymium coaxial speakers designed to deliver crystal-clear vocals, detailed highs, powerful midbass, and impressive output at highway speeds.
• 1 Pair of Velocity Razor Coax Neo RCN65 6.5” Tour Pak Speakers: Matching high-output neodymium coaxial speakers that provide excellent rear fill and balanced sound for both rider and passenger.
• Velocity Razor Power/Ground Harness: Ensures clean, reliable power and grounding for optimal amplifier performance and longevity.
• Volunteer Audio HD-A2B Interface: Seamlessly integrates with your Harley-Davidson®, expertly tuned for Velocity Razor systems.

Why Volunteer Audio?

• Pre-Configured Convenience: We do all the hard work for you. Your kit arrives with gains and filters already set, making installation straightforward.
• Step-by-Step Support: Our detailed videos guide you through the installation process from start to finish.
• Lifetime Tech Support: We offer lifetime support for any items purchased from us, ensuring you have assistance whenever needed.

HD-A2B Amplifier Replacement Interface

Compatibility:

• Designed for Harley-Davidson models with the Skyline OS Infotainment Unit.

Purpose:

• Allows the removal of the stock amplifier.

• Facilitates the installation of a higher-power aftermarket amplifier.

Manufacturer:

• Designed and manufactured by SeirenHD exclusively for Volunteer Audio.

• Engineered and manufactured in the USA.

Integration Features:

• Utilizes the same OE A2B chip for seamless integration.

• Supports factory infotainment updates.

• Retains factory features including:

  • Fader

  • EQ selections with DSP profile adjustments

  • Speed-controlled volume

  • Navigation prompts

DSP Specifications:

• Professionally tuned for the Velocity Razor Pro amplifier and Velocity Razor Coax Neo motorcycle speakers.

• Equalization:

  • 31-band equalizer for each independent channel.

  • 7-band parametric global EQ aligning with infotainment custom EQ settings.

Technical Specs:

• RCA Outputs: 5 Channel, 4v RMS (Front, Rear, and Subwoofer connections)

• Frequency Response: 20 Hz – 24 kHz

• Signal-to-Noise Ratio: 112 dB

• DSP Resolution: 32-bit

• Operational Voltage: 6–28 volts

• Current Consumption:

  • Idle: 14 microamps

  • Full Power: 300 milliamps

Ready to Elevate Your Ride?

At Volunteer Audio, we’ve paired the Velocity Razor Pro amplifier with Velocity Razor Coax Neo RCN65 speakers in the upper fairing and Tour Pak to create a Stage 4 system designed for powerful, balanced sound from front to rear.

With exceptional clarity, strong midbass, impressive output, and professional tuning from Volunteer Audio, this package transforms your factory audio system into something you can actually hear and enjoy at highway speeds.

Ready for a sound transformation? Let Volunteer Audio help you hear your Harley the way it was meant to sound.