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Volunteer Audio  |  SKU: HD-A2B8

Volunteer Audio 10-Channel HD-A2B8 Amplifier Replacement Interface for 2023.5-Up Harley Davidson® Motorcycles

$69999 USD $89999
Taxes, discounts and shipping calculated at checkout.
  • HD-A2B8 – 10-Channel Amplifier Replacement Interface
    (8 Analog + 2 Digital Outputs with Full DSP and Factory Subwoofer Support)
     
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    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
     
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    DSP Tuning Access:
     
    • All DSP settings and tuning are available at: http://eq.seirenhd.com
    • Includes preloaded DSP tunes for:
     • Hertz Audio Systems
     • Velocity Audio Systems
     • Extreme Audio Systems
     • …and many more manufacturers coming soon!
    • Easily pair with any universal amplifier for fast, optimized installation.
     
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    Coming Soon:
     
    • Automatic DSP tuning via upcoming software update
    • Additional tuning features and enhancements under active development
     
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    Vehicle Compatibility:
     
    • 2024-Up Base Model Street Glide
    • 2024-Up Base Model Road Glide
    • 2023.5-Up CVO Street Glide
    • 2023.5-Up CVO Road Glide
    • 2024-Up CVO ST Models