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Hertz  |  SKU: HDPKG2188

Hertz A2B Stage 6 Ultimate Plug & Play Amp And Speaker Package with Subwoofer For 2026 Harley Davidson® Street Glide 3 Limited Motorcycles

$000 USD
Taxes, discounts and shipping calculated at checkout.

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 Stage 4 amplifier and speaker system ensures your music sounds incredible, even at 100 mph.

Why Choose the Volunteer Audio Stage 6 System?

  • Exceptional Sound Clarity: Our package delivers powerful, clear audio, allowing you to enjoy your favorite tunes without distortion, no matter how fast you’re going.
  • Easy Upgrade: Keep your factory radio while enhancing your sound system. Our prewired amplifier is set up for optimal performance with your factory Skyline OS Infotainment radio.
  • Durability: The IP64 rated compact amplifier is moisture-resistant, and the Hertz speakers feature weather-resistant cones, making them perfect for any riding conditions.

What’s Included in the Stage 6 Package?

  • Prewired Velocity RZP2000.6 6-Channel Amplifier: A powerful, compact, all-weather amplifier that arrives prewired with its gains and filters professionally set for your factory Skyline OS infotainment system.
  • 1 Pair of Hertz SX165NEO 6.5-Inch Upper-Fairing Speakers: High-output, weather-resistant speakers that replace the factory upper-fairing speakers with greater volume, clarity and detail.
  • 1 Pair of Hertz SV165NEO 6.5-Inch Tour-Pak Speakers: High-performance neodymium speakers engineered to deliver powerful, clear sound from the Tour-Pak speaker locations.
  • 1 Pair of Hertz SV165NEO 6.5" Lower Fairing Speakers: Add these high-quality speakers to your lower fairing pods for enhanced bass and sound depth, providing a fuller and richer listening experience.
  • Lower Fairing Speaker Pod Kit: Provides a secure fit for the Hertz SV165NEO speakers in your factory lower fairings, with the hardware and wiring needed for installation.
  • 1 Hertz HMS 12 B4-LD-C 12-Inch Subwoofer: A marine-grade, long-excursion subwoofer that adds the deep, powerful bass missing from the factory audio system.
  • Volunteer Audio HD-A2B8 Interface: Integrates the upgraded audio system with your Harley-Davidson’s factory Skyline OS radio while providing the clean, properly tuned signal needed for the Hertz 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, and our lifetime tech support is always here to help.
  • Lifetime Tech Support: We offer lifetime support for any items purchased from us, ensuring you have assistance whenever needed.


HD-A2B8 Amplifier Replacement Interface

Compatibility:
 
• Designed for Harley-Davidson models equipped with the Skyline OS Infotainment Unit.
 
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Purpose:
 
• Allows for the removal of the stock amplifier.
• Facilitates the installation of higher power aftermarket amplifiers.
• Maintains compatibility with factory-installed Rockford Fosgate subwoofers and rear-mounted secondary amplifiers.
 
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Manufacturer:
 
• Designed and manufactured by SeirenHD exclusively for Volunteer Audio.
• Engineered and manufactured in the USA.
 
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Pre-Tuned for Plug-and-Play Performance
 
The HD-A2B8 interface from Volunteer Audio and SeirenHD is ready to install right out of the box—no tuning required for standard systems.
 
Already optimized for immediate use:
•  Flat EQ Curve – Delivers a clean, uncolored audio signal
• Pre-Set Output Levels – Optimized to run clean at full volume with zero clipping
•  Speed-Controlled Volume – Fully retained and pre-configured to match factory behavior
• Fader Support – Works immediately without any setup
• All Factory Features Intact – Including navigation prompts, radio EQ selections, and more
 
Tuning is optional, only necessary when:
• Activating crossovers
• Using the 31-band or 10-band EQ to customize for specific speaker setups
• Adjusting time alignment or per-channel output levels
 
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Plug-and-Play Harnessing
 
The HD-A2B8 includes a harness that connects directly to all factory speaker wiring with zero modification to your motorcycle.
 
For expanded setups, additional plug-and-play harnessing is available below:
• Underseat Harness – Pins into the factory plug on base model bikes
• Lid Disconnect Harness – Clean, quick-disconnect solution for 6x9 lid speaker installations
• Tour Pack Harness – Adds plug-and-play rear audio for tour pack installations
• Lower Fairing Harness – Simple solution for adding speaker pods to your lower fairings
 
All harnessing options are pre-configured and labeled for quick installation and available for purchase below.
 
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Integration Features:
 
• Utilizes the OE A2B chip for seamless factory integration
• Supports all factory infotainment updates
• Retains full factory functionality, including:
 • Fader
 • EQ selections with DSP profile adjustments
 • Speed-controlled volume
 • Navigation prompts
 • Digital A2B subwoofer output for HD Audio by Rockford systems
 
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DSP Specifications:
 
• 10 Output Channels with Full DSP Control:
 • 8 Analog RCA Outputs
 • 2 Digital A2B Outputs (for Rockford subwoofers)
• Equalization:
 • Per-channel 31-band graphic EQ or 10-band parametric EQ
 • Global 7-band parametric EQ mirrors infotainment custom EQ settings
• Time Alignment:
 • Independent delay settings for every channel
• Crossover Control:
 • Independent high-pass and low-pass filters per output pair
• Level Adjustment:
 • Individual channel-level control for precise tuning
 
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Technical Specifications:
 
• RCA Outputs:
 • 8 Channels, 4v RMS
 • Front, Rear, Subwoofer, and Auxiliary output configuration
• Frequency Response: 20 Hz – 24 kHz
• Signal-to-Noise Ratio: 112 dB
• DSP Resolution: 32-bit
• Operating Voltage: 6–28 volts
• Current Draw:
 • Idle: 14 µA
 • Full Power: 300 mA
• Warranty: 1 Year

Velocity RZP2000.6 6-Channel Amplifier

The Velocity RZP2000.6 delivers massive system power from one compact, motorcycle-ready amplifier. Producing up to 350 watts RMS per channel at 2 ohms, it can power up to eight 4-ohm mids and highs through the first four channels, while channels 5 and 6 remain available for dedicated subwoofers.

  • 200 watts RMS × 6 at 4 ohms
  • 350 watts RMS × 6 at 2 ohms
  • 600 watts RMS × 3 bridged at 4 ohms
  • Dedicated controls for front, rear and subwoofer channels
  • Adjustable high-pass and low-pass crossovers
  • Fanless aluminum heat-sink design
  • IP65-rated, sealed all-weather construction
  • Sealed electrical connections and protected adjustments
  • Thermal, overload and short-circuit protection
  • Backed by a 2-year Velocity warranty

As part of this Volunteer Audio Plug-and-Play Package, the amplifier includes the properly sized OFC power and ground harness, bike-specific integration components and system-specific pre-tuning. Gains, crossovers and channel configurations are set for the included speakers and subwoofers—eliminating guesswork during installation.

Important: Due to the amplifier’s high current demand, Volunteer Audio strongly recommends a Lithium battery upgrade for Harley-Davidson applications.

Ready to Elevate Your Ride?

At Volunteer Audio, we’re committed to providing you with an amazing sound system for your Harley Davidson. Our Stage 6 package is designed for top-notch performance and durability, transforming your motorcycle into a high-quality audio experience. Ready for a sound transformation? Let us help you get there!
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