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SaleVolunteer Audio HD-A2B8 10-Channel A2B Amplifier Replacement Interface for 2024-Present Harley
Vendor:Volunteer AudioVolunteer Audio HD-A2B8 10-Channel A2B Amplifier Replacement Interface for 2024-present 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 CVO / 2024-present 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 Harley-Davidson CVO Street Glide. 2023 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 2024-present 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 864-334-6131Sale -
SaleNAV-TV ZEN-H Processor 2024-Present Harley Davidson Consumer
Vendor:Nav TVThe NAV-TV ZEN-H is an A2B plug-and-play 8-channel processor that lets aftermarket amplifiers connect to the factory head unit on 2024-up Harley-Davidson CVO, Road Glide and Street Glide models.Key Specs 8 x 5V RMS RCA outputs 24-bit, 48kHz output 113dB SNR with a Burr Brown DAC 7-20V input voltage range Under 250mA idle current draw Retains OEM chimes, volume control, fader/balance and EQ presets Fitment and Installation NotesDesigned for 2024-up CVO, Road Glide and Street Glide; it works with the factory head unit. Installation manual and software update are linked on the product page.Browse more: plug-and-play DSP and digital sound processors, or get a custom build planned around your bike.Not sure what fits your bike? Start a build consultation or call 864-334-6131.Sale -
SaleNAV-TV ZEN-H PRO Processor 2024-Present Harley Davidson Consumer
Vendor:Nav TVThe NAV-TV ZEN-H PRO is an A2B plug-and-play 8-channel processor with a built-in professional-grade DSP, for adding aftermarket amplifiers to the factory head unit of 2024-2025 CVO, Road Glide and Street Glide models.Key Specs 8 low-level RCA outputs at 5V RMS Built-in 8-channel DSP: time alignment, phase inversion, gain, master EQ and channel EQ Crossovers: Butterworth and Linkwitz-Riley; high-pass, low-pass and band-pass 24-bit, 48kHz output; 113dB SNR; Burr Brown DAC 7-20V input range; under 250mA idle current Retains OEM chimes, volume control, fader/balance and EQ presets Fitment and Installation NotesNAV-TV lists 2024-2025 CVO, Road Glide and Street Glide (USA versions with the Harley-Davidson radio). It works with the factory head unit.Browse more: plug-and-play DSP and digital sound processors, or get a custom build planned around your bike.Not sure what fits your bike? Start a build consultation or call 864-334-6131.Sale -
SaleSpeed Rings 2024-Present Harley Davidson Plug & Play Adapter 4 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 IncThe Curly's Inc Amp Rack for the 2024-up Road Glide, also listed for 2023.5 CVO, mounts amplifiers in the Road Glide fairing. It is made from 14 gauge mild steel and requires modification of the stock amp tray and headlight.Key Specs Made for Harley-Davidson Road Glide, 2024 to current Material: 14 gauge mild steel Modification of the stock amp tray and headlight is required Offered in Standard and XL versions for 2024 (per Curly's) Fitment and Installation NotesCurly's has install videos for both the standard and XL 2024 trays; review them before ordering since this rack is not bolt-on without modification.See the 2024-present installation parts and our motorcycle amplifier parts collections.Not sure what fits your bike? Start a build consultation or call 864-334-6131.Sale -
Sale309 Custom Audio Dual Amp Rack 2024-Present Road Glide (modification required)
Vendor:309 Custom AudioThe 309 Custom Audio Dual Amp Rack is a dual-amplifier mounting rack for 2024-present Harley-Davidson Road Glide models. It lets you keep the stock amplifier or the A2B module while adding two aftermarket amps.Key Specs Fits 2024-present Road Glide Dual-amp layout that retains the stock amplifier or the A2B module Holds two FLX1400.4P amplifiers FLX1000 and FLX700 amplifiers also work, as do dual SounDigital 1200.4 and similar combinations Built around the silver stock RF amplifier, not the black 4-channel amplifier Fitment and Installation NotesModification is required. The rack is designed for the silver stock RF amplifier, and exact cutting is needed if your bike has the black RF amplifier.Pair the rack with motorcycle amplifiers and browse more 2024-present installation parts. For a full system plan, talk to us about a custom build.Not sure what fits your bike? Start a build consultation or call 864-334-6131.Sale -
SaleCurly's Inc Amp Rack 24-up Street Glide
Vendor:Curly's IncThe Curly's Inc Amp Rack for the 2024-up Street Glide, also listed for 2023.5 CVO, replaces the inner factory tray to give room for multiple amplifiers and a DSP. The 2024 tray bolts on directly.Key Specs Made for Harley-Davidson Street Glide, 2024 to current 2024 tray is direct bolt-on with no cutting or modifications Replaces the inner factory tray Room for multiple amps and a digital sound processor Fitment and Installation NotesCurly's publishes an install video for the 2024 Street Glide amp tray.Browse the 2024-present installation parts and motorcycle amplifier parts collections.Not sure what fits your bike? Start a build consultation or call 864-334-6131.Sale -
Soundz 2024-Present Wireless CarPlay Adapter
Vendor:SoundzThe Soundz 2024-present Wireless CarPlay Adapter is for Apple CarPlay only (Android Auto users need a different adapter). It removes the need for a headset to activate CarPlay and plugs in under the seat on 2024-present bikes.Browse motorcycle radios and 2024-present installation parts for related parts.Not sure what fits your bike? Start a build consultation or call 864-334-6131. -
Soundz 2024-Present Kickstand Bypass Plug
Vendor:SoundzThe Soundz 2024-present Kickstand Bypass Plug is an off-road-use-only plug for 2020+ Harley-Davidson models with the RDRS feature. It keeps the bike from reacting to the kickstand sensor.Key Specs Allows brake hold assist in neutral Allows brake hold assist with the kickstand down Eliminates the kickstand-down warning screen Eliminates the risk of the engine shutting off from sensor failure Off-road use only Fitment and Installation NotesPlug-and-play on 2023+ CVO. 2020-2024 non-CVO models require specialized installation, and the bike will need a flash.Shop Soundz. Motorcycle parts and accessories. Get a custom build quote.Not sure what fits your bike? Start a build consultation or call 864-334-6131. -
Soundz 2024-Present Under-seat Accessory Splitter
Vendor:SoundzThe Soundz 2024-present Under-seat Accessory Splitter lets you use the under-seat connection for more than one device on 2024-present Harley-Davidson bikes. For example, you can run CarPlay and an accessory harness at the same time.See our motorcycle radios and 2024-present installation parts collections for related parts.Not sure what fits your bike? Start a build consultation or call 864-334-6131. -
SaleCicada Audio HDPG4K 4 AWG Amp Power Kit
Vendor:Cicada AudioThe Cicada Audio HDPG4K is a 4 AWG amplifier power kit for Harley-Davidson motorcycles. It includes 6 ft of power and ground cable with black braid, plus a fuse holder and a remote trigger wire.Key Specs 6 ft 4 AWG power/ground, black over braid Ring terminals at the battery side; ferrules at the amp side Remote trigger wire with H-D plug, for termination or to plug into the H-D harness Waterproof Mini ANL fuse holder with 60, 80 and 100 amp fuses Browse more amplifier parts and Harley-Davidson plug-and-play kits, or see our custom build options.Not sure what fits your bike? Start a build consultation or call 864-334-6131.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
Key Specifications
| Application | Harley Davidson and Indian touring motorcycles |
| Category Role | System completion and installation support |
| Component Types | Adapters, wiring, power accessories, mounting hardware |
| Design Focus | Electrical integrity, fitment accuracy, reliability |
| Use Case | Staged upgrades and full custom audio builds |
| Installation Level | Professional-grade motorcycle audio systems |
Specifications summarized from manufacturer technical data. Always verify compatibility and system requirements before installation.
Motorcycle Audio Parts and Accessories
Motorcycle parts and accessories are the supporting components that allow an audio system to function correctly, reliably, and safely. This collection includes purpose-built parts selected specifically for Harley Davidson and Indian touring motorcycles, where fitment accuracy and electrical integrity matter.
These components are not optional add-ons — they are required to complete professional-grade audio installations. From signal integration to power management and mounting hardware, each item in this collection addresses a specific requirement in motorcycle audio system design.
This collection supports a wide range of system needs, including:
• Audio integration adapters and signal interfaces
• Electrical and power-management accessories
• Mounting hardware and installation components
• Model-specific fitment and interface parts
Proper accessory selection prevents noise issues, voltage instability, improper mounting, and premature component failure. These parts ensure speakers, amplifiers, DSPs, and subwoofers operate as designed within the constraints of touring motorcycle platforms.
All products in this collection are vetted for compatibility with Harley and Indian motorcycles and align with professional installation standards. This category serves as a system-completion resource for both staged upgrades and full custom audio builds.
System Essentials
Motorcycle Amplifiers
Motorcycle Digital Sound Processors
Motorcycle Speaker Installation Parts
Custom Motorcycle Audio Builds
Built to Withstand the Road
DS18 speakers are designed to endure the challenges of the open road while providing exceptional sound quality. Built using durable, weatherproof materials, these speakers are engineered to resist vibrations, impacts, and exposure to the elements without compromising on audio clarity.
Effortless Integration with Your Bagger Motorcycle
Designed for seamless integration, DS18 speakers fit effortlessly into your motorcycle’s audio system without sacrificing space or style. With user-friendly installation and advanced connectivity options, including Bluetooth and RCA inputs, DS18 ensures you can upgrade your sound system without sacrificing functionality.
Customizable Sound for Every Rider
From deep bass to crisp highs, DS18 speakers offer the customization to match your audio preferences. Featuring advanced DSP (Digital Signal Processing) technology, these speakers allow you to fine-tune your sound system for an optimal listening experience. Whether you prefer a balanced sound or a bass-heavy setup, DS18 speakers deliver versatile solutions for your needs.
Shop DS18 Audio at Garage Bagger Stereo
Explore our wide selection of DS18 speakers and motorcycle audio accessories at Garage Bagger Stereo. Whether you’re looking for a minor upgrade or a complete overhaul, we are your trusted destination for premium motorcycle audio gear. With expert guidance and top-notch customer service, we ensure you find the perfect audio solution for your ride.