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Volunteer Audio HD-A2B8 10-Channel A2B Amplifier Replacement Interface for 2023.5+ Harley
Vendor:Volunteer AudioVolunteer Audio HD-A2B8 10-Channel A2B Amplifier Replacement Interface for 2023.5+ Harley The Volunteer Audio HD-A2B8 is a 10-channel amplifier replacement interface designed for Harley-Davidson motorcycles equipped with the Skyline OS infotainment system. It allows the factory amplifier to be removed while providing clean, high-level system integration for aftermarket amplifiers without sacrificing key factory functions. The HD-A2B8 provides eight 4V RMS analog RCA outputs plus two digital A2B outputs for compatible factory Rockford Fosgate subwoofer systems, giving installers a flexible platform for high-output aftermarket audio builds while retaining factory controls and vehicle integration. Start a Build Consultation Call 864-334-6131 THE REFERENCE STANDARD 10 Outputs. Full DSP. Factory A2B Integration. Remove the stock amplifier, add aftermarket power, retain factory functionality, and control the complete system from one A2B interface. Volunteer Audio HD-A2B8 Key Specifications Model HD-A2B8 Product Type 10-Channel A2B Amplifier Replacement Interface with DSP Vehicle Platform Harley-Davidson motorcycles equipped with Skyline OS Total DSP Outputs 10 channels Analog Outputs 8 RCA channels Analog Output Voltage 4V RMS Digital Outputs 2 A2B channels for compatible factory Rockford subwoofers DSP Resolution 32-bit Equalization 31-band graphic EQ or 10-band parametric EQ per channel Global EQ 7-band parametric EQ Time Alignment Independent delay control for every channel Crossover Control Independent high-pass and low-pass filters by output pair Channel Level Control Independent per-channel level adjustment Frequency Response 20 Hz – 24 kHz Signal-to-Noise Ratio 112 dB Operating Voltage 6V – 28V Idle Current Draw 14 µA Full-Power Current Draw 300 mA Warranty 1 Year Manufacturing Designed and manufactured in the USA by SeirenHD exclusively for Volunteer Audio Replace the Factory Amplifier Without Losing Factory Integration The HD-A2B8 is designed for Harley audio systems where the goal is to remove the factory amplifier and replace it with higher-power aftermarket amplification. Instead of bypassing or sacrificing factory functionality, the interface works with the motorcycle's A2B network to preserve key infotainment and audio features while providing clean outputs for the aftermarket system. Allows removal of the factory amplifier. Supports installation of higher-power aftermarket amplifiers. Maintains compatibility with supported factory Rockford Fosgate subwoofers. Maintains compatibility with supported rear-mounted secondary amplifiers. 10 DSP-Controlled Outputs The HD-A2B8 provides a total of 10 DSP-controlled output channels, giving installers substantially more flexibility than a basic A2B-to-RCA interface. 8 Analog RCA Outputs Eight 4V RMS RCA outputs can be configured for front, rear, subwoofer, and auxiliary amplifier channels. 2 Digital A2B Outputs Two digital outputs retain compatibility with supported factory Rockford Fosgate subwoofer systems. Pre-Tuned for Plug-and-Play Performance Volunteer Audio and SeirenHD ship the HD-A2B8 preconfigured for standard installations, so a basic system does not require DSP tuning before it can be used. Flat EQ curve for a clean, uncolored signal. Pre-set output levels optimized for clean full-volume operation. Speed-controlled volume retained and preconfigured. Factory fader operation retained without additional setup. Navigation prompts and factory radio EQ selections retained. Tuning is optional: Additional DSP adjustment is only required when you want to activate custom crossovers, change EQ, adjust time alignment, or fine-tune individual output levels. Full DSP Control When You Need It For advanced systems, the HD-A2B8 includes full digital signal processing rather than functioning only as a signal converter. Per-Channel EQ Choose between a 31-band graphic EQ or 10-band parametric EQ for individual output channels. Time Alignment Independent channel delay allows precise timing adjustment across the complete speaker system. Crossovers Independent high-pass and low-pass filtering is available for each output pair. Level Control Individual channel-level adjustment allows precise front, rear, subwoofer, and auxiliary balancing. Factory Features Retained Because the HD-A2B8 integrates directly with the Harley A2B network, it retains core factory infotainment functions instead of forcing the system into a basic aftermarket-only configuration. Factory fader control. Factory EQ selections with corresponding DSP profile adjustments. Speed-controlled volume. Navigation prompts. Factory infotainment updates. Digital A2B subwoofer output for supported Harley-Davidson Audio powered by Rockford Fosgate systems. Plug-and-Play Factory Speaker Harnessing The HD-A2B8 includes a harness that connects directly to the factory speaker wiring without requiring modification to the motorcycle's original wiring. Additional plug-and-play harnessing is available separately for more complex systems. Underseat harness for supported base-model motorcycles. Lid disconnect harness for 6x9 saddlebag speaker installations. Tour-pack harness for rear speaker expansion. Lower-fairing harness for added lower speaker pods. 2023.5+ / 2024+ Harley-Davidson Fitment The HD-A2B8 is designed for Harley-Davidson motorcycles equipped with the Skyline OS infotainment platform. 2024+ Harley-Davidson Street Glide base models. 2024+ Harley-Davidson Road Glide base models. 2023.5+ Harley-Davidson CVO Street Glide. 2023.5+ Harley-Davidson CVO Road Glide. 2024+ Harley-Davidson CVO ST models. Fitment note: Verify that the motorcycle uses the Skyline OS infotainment system and confirm the factory amplifier/subwoofer configuration before ordering. DSP Tuning Access Advanced HD-A2B8 DSP settings can be accessed through SeirenHD's tuning platform. Open SeirenHD DSP Tuning Volunteer Audio also lists preloaded DSP tunes for selected audio-system brands, with additional profiles and automated tuning features planned through future software updates. Need Help Planning Your 2023.5+ Harley Audio System? The HD-A2B8 can support simple amplifier replacement or a much more advanced multi-amplifier DSP system. The correct installation depends on the motorcycle's factory equipment, amplifier count, speaker configuration, factory subwoofer use, and complete system design. Start a Build Consultation Call 864-334-6131 -
SaleNAV-TV ZEN-H Processor 2024+ Harley Davidson Consumer
Vendor:Nav TVNAV-TV ZEN-H Processor A2B Plug-N-Play 8-Channel Processor For 2024-Up Harley-Davidson® Motorcycle Works with factory headunit Technical Specs: - 24 Bit 48khz Output - 8 x 5v RMS RCA outputs - 113db SNR - Burr Brown DAC - 7 - 20v input voltage range - <250mA idle current draw Installation Manual Software Update and Instructions Compatibility: Designed for 2024+ Harley-Davidson CVO, Roadglide, and Streetglide Purpose: Seamlessly allows aftermarket amplifiers to be added to the factory Harley headunit via its low level (8 channel) analog RCAs @5V RMS Integrates with various OEM data networks to retain, chimes, volume control, fader/balance and EQ Presets (for true OEM integration)Sale -
SaleNAV-TV ZEN-H PRO Processor 2024+ Harley Davidson Consumer
Vendor:Nav TVNAV-TV ZEN-H PRO Processor A2B Plug-N-Play 8-Channel Processor For 2024-Up Harley-Davidson® Motorcycle Works with factory headunit The Pro version has a full professional-grade 8-channel DSP built in. Features include: - Time alignment - Phase inversion - Crossover selection; Butterworth, Linkwitz-Riley. High-pass, Low-pass and Band-pass - Gain control - Master EQ - Channel EQ Installation Manual Software Update and Instructions Compatibility: Designed for 2024+ Harley-Davidson CVO, Roadglide, and Streetglide Purpose: Seamlessly allows aftermarket amplifiers to be added to the factory Harley headunit via its low level (8 channel) analog RCAs @5V RMS Integrates with various OEM data networks to retain, chimes, volume control, fader/balance and EQ Presets (for true OEM integration)Sale -
SaleSpeed Rings 23.5+ Harley Davidson Plug & Play Adapter 2 Channel T-harness
Vendor:Speed RingsPlug and Play T-Harness for Harley Davidson Motorcycles: Elevate Your Sound System Seamless Integration with Stock Radios and Rockford Amplifiers Elevate the audio experience of your Harley Davidson motorcycle with our cutting-edge Plug and Play T-Harness, designed specifically for 2023 CVO to 2024 models. Our harness offers a straightforward solution for motorcycle enthusiasts looking to enhance their sound system without the hassle of splicing or cutting wires. Key Features: Universal Compatibility:** Works effortlessly with all amplifiers, including SounDigital Amps, the DS18 ION Series, and most other brands, ensuring a wide range of options for upgrading your sound system. No Wire Cutting Required:** Our plug-and-play design allows you to add an aftermarket amplifier to your motorcycle's sound system without modifying your stock radio or existing wiring. Easy Installation:** The harness is labeled for a hassle-free installation, saving you time and effort. Enhanced Connectivity:** Comes equipped with RCA inputs from the Axxess box to the amp for both front and rear, along with a built-in remote wire for easy amp turn-on. Optimized for CVO and Ultra Models:** It is designed to work with CVO and Ultra models and utilizes existing front and rear wiring for seamless integration. Comprehensive Output Support:** Features front speaker pods to amplifier harness (output) and rear speaker wires to amplifier harness (output), including rear outputs for stock wiring like CVO Boom lids and Ultra Rear Tour Pak Pods. Ideal for Every Harley Davidson Enthusiast Whether you're looking to amplify your sound for road trips or simply enhance your listening experience, our Plug and Play T-Harness is the perfect solution. It's designed to work flawlessly with the new stock radio and Rockford stock amplifiers, ensuring that you get the best possible sound quality without compromising on the integrity of your motorcycle's electrical system. Amplify Your Ride Our harness will work with a DSP or amplifier or combo., highlighting its specialized design for direct amplifier integration. It offers a simple yet effective way to elevate the audio quality of your Harley Davidson, making every ride a memorable one.Transform your motorcycle's audio system today with our Plug and Play T-Harness — where quality, convenience, and superior sound meet. Please allow 5-7 business days lead time for this custom-made part. Checking polaritySale -
SaleCurly's Inc Amp Rack 24-up Road Glide (modification required)
Vendor:Curly's Inc23.5 CVO and 2024- up Road Glide Custom Amp Rack Made for: Harley Davidson 2024 to current Road Glide Years: 2024-Current Material Used: 14ga Mild Steel Special Notes: Modification of the stock amp tray and headlight are required. Please see the section here on 24 Road Glide Modification Large Installation Video X-Large Installation VideoSale -
Sale309 Custom Audio Dual Amp Rack 23.5-current Road Glide (modification required)
Vendor:309 Custom Audio23.5-current Road Glide Custom Amp Rack Made for: Harley Davidson 2024 to current Road Glide Years: 2023.5-Current This is a dual-amp rack for the 23.5-24 current Road Glides, retaining the stock amplifier or using the A2B Module. It easily holds 2 FLX1400.4P, and there is nothing dual FLX above that, but FLX1000 and FLX700 will work, as will Dual SounDigital 1200.4 and similar combos. The amp rack is designed for the Silver stock RF amplifiers, not the 4-channel black amplifiers. Modification will be required of the amp rack with the Black RF amp. Exact cutting is required as Curly's RG Amp racks below X-Large Installation VideoSale -
SaleCurly's Inc Amp Rack 24-up Street Glide
Vendor:Curly's IncCurly's Amp Rack 24-up Street Glide 23.5 CVO and 2024- up Street Glide Custom Amp Rack Made for: Harley Davidson 2024 to current Street Glide Years: 2024-Current Material Used: 14ga Mild Steel Special Notes: No modification require or cutting New part, please allow 5-10 business days for fulfillmentSale -
Soundz 23.5+ Wireless CarPlay Adapter
Vendor:SoundzSoundz Audio 23.5+ Wireless Apple ONLY CarPlay Adapter Android Auto Users Click Here Description Eliminates the requirement of a headset to activate the CarPlay feature. Plugs in under the seat. -
Soundz 23.5+ Kickstand Bypass Plug
Vendor:SoundzSoundz Audio 23.5+ Kickstand Bypass Plug Description **Off-Road Use Only** Allows brake hold assist in neutral. Allows brake hold assist with kickstand down. Eliminates kickstand down warning screen. Eliminates risk of the engine shutting off due to sensor failure **Works with all models 2020+ with RDRS feature** 2023+ CVO – Plug-and-Play 2020-2024 non-CVO Specialized installation is required (the bike will need a flash). -
Soundz 23.5+ Under-seat Accessory Splitter
Vendor:SoundzSoundz Audio 23.5+ Under-seat Accessory Splitter Description Allows for multiple uses for under seat (example: car play, and accessory harness) -
SaleCicada Audio HDPG4K 4 AWG Amp Power Kit
Vendor:Cicada AudioHDPG4K 4 AWG AMP POWER KIT Kit Includes 4 AWG H-D® Amplifier Power Kit 6ft Power/Ground with black over braid, terminated w/ ring terminals at the battery side, Ferrules on the amp side Remote trigger wire w/ H-D® plug for termination to remote trigger or plug into the H-D® harness Waterproof Mini ANL Fuse Holder w/60- and 100-amp fuses Need some distribution blocks?Sale -
SaleCicada Audio HDPG8K 8 Gauge HD OFC Amplifier Installation Kit
Vendor:Cicada AudioCicada Audio HDPG8K 8 GUAGE POWER/GROUND HARNESS KIT FOR HD Looking to upgrade your audio system on your HD motorcycle? Using one of our amplifiers? Then this is the Heavy Duty power kit solution for your motorcycle audio needs. The HDPG8K Power/ground kit is designed to handle the higher current needs of the Cicada Audio DSP125.4D/CX125.4 and CX250.2 amplifiers. HDPG8K Power kit uses high-quality 8-gauge OFC copper cable eliminating chances of corrosion or increases cable resistance over time due to the harsh open environment. Capable of supplying current to most any heavy-duty application up to 60A (or 1000 WRMS!) of continuous current draw. HDPG8K Power Kit comes complete with a custom-molded WaterProof fuse holder (w/fuse), insulated high current ring terminals, and factory-type wire looming for the ultimate in power cable integration. Works In Most Any Motorcycle Amplifier Application Up To 60A. Includes Custom Tooled WaterProof Hi-Current Fuse Holder (w/60A fuse). Pre-Terminated And Insulated Battery Ring Terminals. 8-Gauge Hi-Quality OFC Copper Core Cable (No CCA garbage here). Loomed Harness Design Improved Integration And Ease Of Installation Into Your Motorcycle. Will work for any amp requiring 8g wiringSale
Watch: 23.5+ Harley Audio Install Overview
This video walks through the 23.5+ touring platform and helps you understand what’s different on the newest Harley audio systems. It’s the fastest way to avoid ordering the wrong parts or missing a required install step.
Why 23.5+ Installation Parts Matter
The 2023.5 CVO and 2024+ touring bikes use an updated factory audio layout and different mounting and wiring requirements. Using the correct installation parts ensures proper amplifier placement, stable mounting, clean wiring, and a finished install that holds up long-term.
What You’ll Find in This Collection
- Amplifier mounting and brackets designed for the newest Harley touring platform
- Wiring essentials for clean routing and reliable power delivery
- Hardware and install accessories that solve the common fitment issues on 23.5+ bikes
- Platform-correct solutions for upgrades that integrate cleanly with the latest Harley systems
Recommended Next Steps for Your Build
If you’re building a full 23.5+ system, these collections complete the upgrade and keep your install platform-correct:
23.5+ Plug and Play Kits
The cleanest way to upgrade the newest Harley platform with correct fitment and true plug and play integration.
23.5+ Speakers
Choose the correct 6.5" and 6x9" speaker upgrades designed for the 23.5+ touring platform.
23.5+ Lids
Rear speaker lid options designed for proper fitment and stronger output on 23.5+ touring bikes.
23.5+ Speaker Installation
Speaker-specific hardware and install essentials to make sure your upgrade fits right and performs the way it should.
Get the Right Parts the First Time
If you’re not sure which installation parts match your exact bike model and factory audio package, Garage Bagger Stereo can help you confirm the right solution before you order. That’s how you avoid wasted time, returns, and install problems.
Custom Installation Components for Your Harley
- Complete Power Kits for Your Audio System
- Custom-Fit Amp Racks for Your Harley
- Plug-and-Play T-Harnesses and Wiring Solutions
- Premium RCA Cables and Accessories
- Protect Your Investment with Custom Bag Seals
Upgrade Your Ride with Confidence
With Garage Bagger Stereo’s amplifier installation kits, transforming the audio experience on your Harley Davidson 2023 CVO or 2024 touring model has never been easier. Tailored to your motorcycle's specifications, our products ensure a seamless, high-performance upgrade. Embrace the open road with the sound quality you deserve.
High-Performance Power Kits and Custom Installation Solutions
Transform your Harley Davidson’s audio experience with our comprehensive power kits and custom-fit installation solutions. The Cicada Audio HDPG4K 4 AWG Amp Power Kit and HDPG4KD Dual Amp Power Kit are designed to provide your system with the power it needs for peak performance, ensuring a perfect fit and easy installation. Pair these with Curly's Amp Rack 24-up Road Glide and Street Glide models to securely house your components, all while maintaining a sleek, professional look.
Seamless Integration with Plug-and-Play Harnesses and Premium Accessories
Simplify your upgrades with NVS Audio’s DSP T-Harness and Speed Rings' Plug & Play Adapters, which allow for effortless integration of advanced audio components without compromising your bike’s wiring. Enhance your sound system further with SkyHigh Car Audio Twisted RCA cables and Speed Rings Road Glide Grills w/Horn, and protect your investment with Nagy's Customs 10" Bag Seals—all designed to keep your audio gear performing at its best, even in tough conditions.
Get Started Today
Ready to elevate your Harley’s audio system? Browse our selection of amplifier installation parts designed specifically for your model. For guidance or more information, contact our expert team at Garage Bagger Stereo. Enhance your ride with the perfect sound setup today at Garage Bagger Stereo