Volunter Audio 23.5+ Harley Davidson Universal HD-A2B8 Amplifier Replacement Interface

TYPE: Amp Installation Products
VENDOR: Volunteer Audio
  • volunteer audio a2b module
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PRODUCT INFORMATION

Volunter Audio 23.5+ Harley Davidson Universal HD-A2B8 Amplifier Replacement Interface

TYPE: Amp Installation Products
VENDOR: Volunteer Audio
Type: Amp Installation Products
Vendor: Volunteer Audio

$699.99

$899.99

$699.99

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Motorcycle Audio

Volunter Audio 23.5+ Harley Davidson Universal HD-A2B8 Amplifier Replacement Interface

Need Help?

Call us at (864) 334‑6131 or message our team with your bike year/model and current upgrades. We'll map the best path to louder, cleaner sound.

  • Description

  • Reviews

Remove the 23.5+ Harley Davidson Stock Amplifiers NOW!

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

Works with any aftermarket amplifier

Technical Specs:

  • 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


Compatibility:

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

Purpose:

  • Allows for the removal of the stock amplifier.
  • Facilitates the installation of a higher-power amplifier

NOW ADD DSP Software

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

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
DSP Tuning Access:
  • All DSP settings and tuning are available at: http://eq.sirenhd.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.

need help deciding?

Speak now to one of our sales consultants or support team.
call: 864-334-6131

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