{"product_id":"hdpkg1687-hertz-stage-4-road-glide-upgrade","title":"Hertz A2B Stage 4 Ultimate Plug \u0026 Play Amp And Speaker Package with Subwoofer Kit For 2024-Up Harley Davidson® Base Model Road Glide Motorcycles with Tour Paks","description":"\u003cp\u003eTired of struggling to hear your factory Harley speakers at highway speeds? Or constantly replacing blown speakers? You’re not alone!\u003c\/p\u003e\n\u003cp\u003eAt 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Choose the Volunteer Audio Stage 4 System?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Sound Clarity\u003c\/strong\u003e: Our package delivers powerful, clear audio, allowing you to enjoy your favorite tunes without distortion, no matter how fast you’re going.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Upgrade\u003c\/strong\u003e: 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e: The IP64 rated compact amplifier is moisture-resistant, and the Hertz speakers feature weather-resistant cones, making them perfect for any riding conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat’s Included in the Stage 4 Package?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrewired Amplifier\u003c\/strong\u003e: Gains and filters adjusted specifically for your factory Skyline OS Infotainment radio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 Pair of Hertz SX165NEO 6.5” Upper Fairing Speakers\u003c\/strong\u003e: High-quality replacements for your factory speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 Pair of Hertz SV165NEO 6.5” Tour Pak Speakers\u003c\/strong\u003e: Designed for clear sound and durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHertz Power\/Ground Harness\u003c\/strong\u003e: Ensures reliable power and grounding for optimal performance and longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolunteer Audio HD-A2B8 Interface\u003c\/strong\u003e: Seamlessly integrates with your Harley Davidson, expertly tuned for Hertz systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBC-SPG Tour Pak Grilles\u003c\/strong\u003e: Stylish and functional grilles to protect your new speakers and complete your audio upgrade with a sleek look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Volunteer Audio?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Configured Convenience\u003c\/strong\u003e: We do all the hard work for you. Your kit arrives with gains and filters already set, making installation straightforward.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep-by-Step Support\u003c\/strong\u003e: Our detailed videos guide you through the installation process, and our lifetime tech support is always here to help.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifetime Tech Support:\u003c\/strong\u003e We offer lifetime support for any items purchased from us, ensuring you have assistance whenever needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eHertz \/ Cicada Audio Subwoofer Kit\u003c\/h3\u003e\n\u003cp\u003eIntroducing the Hertz \/ Cicada Audio Add-On Subwoofer Kit—your new add-on bass solution built for our \u003cstrong data-start=\"132\" data-end=\"222\"\u003eplug-and-play Hertz SP4.900 2-speaker and 4-speaker kits\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThis \u003c\/span\u003e\u003cstrong data-start=\"94\" data-end=\"138\"\u003eported and braced dual-10\" subwoofer kit\u003c\/strong\u003e\u003cspan\u003e transforms your saddlebags into true bass enclosures using the included \u003c\/span\u003e\u003cstrong data-start=\"211\" data-end=\"230\"\u003ecut-in template. \u003c\/strong\u003e\u003cspan\u003eThe 10\" subs mount directly into the \u003c\/span\u003e\u003cstrong data-start=\"298\" data-end=\"312\"\u003ebag itself\u003c\/strong\u003e\u003cspan\u003e, delivering the deep, low-frequency punch your 6×9 speakers can’t reach.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKit includes disconnect harness to still allow for easy \u003c\/span\u003eremoval of saddlebag.\u003c\/p\u003e\n\u003cdiv style=\"background-color: #ffebeb; border-left: 4px solid #cc0000; padding: 12px; margin: 15px 0;\"\u003e⚠️ \u003cstrong\u003eImportant Note:\u003c\/strong\u003e\u003cbr\u003eThis subwoofer kit is \u003cstrong data-end=\"222\" data-start=\"132\"\u003ecompatible only with our existing 2024+ plug-and-play Hertz SP4.900 2-speaker and 4-speaker kits \u003c\/strong\u003ewhen running from a \u003cstrong data-end=\"263\" data-start=\"243\"\u003esingle amplifier\u003c\/strong\u003e.\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e(2) Hertz CS 250 S2 10\" Subwoofers\u003c\/strong\u003e – Powerful 2-ohm subs delivering deep, controlled bass with \u003cstrong\u003e250\u003c\/strong\u003e\u003cstrong\u003eW RMS per speaker\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCicada Audio 24HDRING10\u003c\/strong\u003e – Left \u0026amp; Right precision mounting rings for perfect saddlebag integration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCicada Audio 24HDRINGT\u003c\/strong\u003e – Left \u0026amp; Right trim rings for a complete, sealed fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCicada Audio 24HDPORT3\u003c\/strong\u003e – Pair of Flush-mount, ABS-molded ports for optimized airflow and stronger low-end output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Wiring\u003c\/strong\u003e – easily ties into the Hertz SP4.900 amp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware Pack\u003c\/strong\u003e – All stainless hardware needed for a clean, secure install which includes: (16) 8-32 x 1.25 inch screws, (16) #8 Washers, (16) 8-32 Lock Nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eHD-A2B8 Amplifier Replacement Interface\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e• Designed for Harley-Davidson models equipped with the Skyline OS Infotainment Unit.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e⸻\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003ePurpose:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e• Allows for the removal of the stock amplifier.\u003c\/div\u003e\n\u003cdiv\u003e• Facilitates the installation of higher power aftermarket amplifiers.\u003c\/div\u003e\n\u003cdiv\u003e• Maintains compatibility with factory-installed Rockford Fosgate subwoofers and rear-mounted secondary amplifiers.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e⸻\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e• Designed and manufactured by SeirenHD exclusively for Volunteer Audio.\u003c\/div\u003e\n\u003cdiv\u003e• Engineered and manufactured in the USA.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e⸻\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003ePre-Tuned for Plug-and-Play Performance\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eThe HD-A2B8 interface from Volunteer Audio and SeirenHD is ready to install right out of the box—no tuning required for standard systems.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eAlready optimized for immediate use:\u003c\/div\u003e\n\u003cdiv\u003e•  Flat EQ Curve – Delivers a clean, uncolored audio signal\u003c\/div\u003e\n\u003cdiv\u003e• Pre-Set Output Levels – Optimized to run clean at full volume with zero clipping\u003c\/div\u003e\n\u003cdiv\u003e•  Speed-Controlled Volume – Fully retained and pre-configured to match factory behavior\u003c\/div\u003e\n\u003cdiv\u003e• Fader Support – Works immediately without any setup\u003c\/div\u003e\n\u003cdiv\u003e• All Factory Features Intact – Including navigation prompts, radio EQ selections, and more\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eTuning is optional, only necessary when:\u003c\/div\u003e\n\u003cdiv\u003e• Activating crossovers\u003c\/div\u003e\n\u003cdiv\u003e• Using the 31-band or 10-band EQ to customize for specific speaker setups\u003c\/div\u003e\n\u003cdiv\u003e• Adjusting time alignment or per-channel output levels\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e⸻\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003ePlug-and-Play Harnessing\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eThe HD-A2B8 includes a harness that connects directly to all factory speaker wiring with zero modification to your motorcycle.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eFor expanded setups, additional plug-and-play harnessing is available below:\u003c\/div\u003e\n\u003cdiv\u003e• Underseat Harness – Pins into the factory plug on base model bikes\u003c\/div\u003e\n\u003cdiv\u003e• Lid Disconnect Harness – Clean, quick-disconnect solution for 6x9 lid speaker installations\u003c\/div\u003e\n\u003cdiv\u003e• Tour Pack Harness – Adds plug-and-play rear audio for tour pack installations\u003c\/div\u003e\n\u003cdiv\u003e• Lower Fairing Harness – Simple solution for adding speaker pods to your lower fairings\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eAll harnessing options are pre-configured and labeled for quick installation and available for purchase below.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e⸻\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eIntegration Features:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e• Utilizes the OE A2B chip for seamless factory integration\u003c\/div\u003e\n\u003cdiv\u003e• Supports all factory infotainment updates\u003c\/div\u003e\n\u003cdiv\u003e• Retains full factory functionality, including:\u003c\/div\u003e\n\u003cdiv\u003e • Fader\u003c\/div\u003e\n\u003cdiv\u003e • EQ selections with DSP profile adjustments\u003c\/div\u003e\n\u003cdiv\u003e • Speed-controlled volume\u003c\/div\u003e\n\u003cdiv\u003e • Navigation prompts\u003c\/div\u003e\n\u003cdiv\u003e • Digital A2B subwoofer output for HD Audio by Rockford systems\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e⸻\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eDSP Specifications:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e• 10 Output Channels with Full DSP Control:\u003c\/div\u003e\n\u003cdiv\u003e • 8 Analog RCA Outputs\u003c\/div\u003e\n\u003cdiv\u003e • 2 Digital A2B Outputs (for Rockford subwoofers)\u003c\/div\u003e\n\u003cdiv\u003e• Equalization:\u003c\/div\u003e\n\u003cdiv\u003e • Per-channel 31-band graphic EQ or 10-band parametric EQ\u003c\/div\u003e\n\u003cdiv\u003e • Global 7-band parametric EQ mirrors infotainment custom EQ settings\u003c\/div\u003e\n\u003cdiv\u003e• Time Alignment:\u003c\/div\u003e\n\u003cdiv\u003e • Independent delay settings for every channel\u003c\/div\u003e\n\u003cdiv\u003e• Crossover Control:\u003c\/div\u003e\n\u003cdiv\u003e • Independent high-pass and low-pass filters per output pair\u003c\/div\u003e\n\u003cdiv\u003e• Level Adjustment:\u003c\/div\u003e\n\u003cdiv\u003e • Individual channel-level control for precise tuning\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e⸻\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e• RCA Outputs:\u003c\/div\u003e\n\u003cdiv\u003e • 8 Channels, 4v RMS\u003c\/div\u003e\n\u003cdiv\u003e • Front, Rear, Subwoofer, and Auxiliary output configuration\u003c\/div\u003e\n\u003cdiv\u003e• Frequency Response: 20 Hz – 24 kHz\u003c\/div\u003e\n\u003cdiv\u003e• Signal-to-Noise Ratio: 112 dB\u003c\/div\u003e\n\u003cdiv\u003e• DSP Resolution: 32-bit\u003c\/div\u003e\n\u003cdiv\u003e• Operating Voltage: 6–28 volts\u003c\/div\u003e\n\u003cdiv\u003e• Current Draw:\u003c\/div\u003e\n\u003cdiv\u003e • Idle: 14 µA\u003c\/div\u003e\n\u003cdiv\u003e • Full Power: 300 mA\u003c\/div\u003e\n\u003cdiv\u003e• Warranty: 1 Year\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e⸻\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eDSP Tuning Access:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e• All DSP settings and tuning are available at: \u003ca href=\"http:\/\/eq.sirenhd.com\/\" rel=\"noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=http:\/\/eq.sirenhd.com\u0026amp;source=gmail\u0026amp;ust=1750856786051000\u0026amp;usg=AOvVaw3po1BlUDp_PtRbgXhviMEX\" target=\"_blank\"\u003ehttp:\/\/eq.sirenhd.com\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e• Includes preloaded DSP tunes for:\u003c\/div\u003e\n\u003cdiv\u003e • Hertz Audio Systems\u003c\/div\u003e\n\u003cdiv\u003e • Velocity Audio Systems\u003c\/div\u003e\n\u003cdiv\u003e • Extreme Audio Systems\u003c\/div\u003e\n\u003cdiv\u003e • …and many more manufacturers coming soon!\u003c\/div\u003e\n\u003cdiv\u003e• Easily pair with any universal amplifier for fast, optimized installation.\u003c\/div\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eHertz SP4.900 Amplifier\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOur friends at Hertz have released a game changer for motorcycle audio! The Hertz SP4.900 amplifier offers a small footprint but huge output. It’s the most powerful amp available in its size, delivering 160W RMS @ 4Ω and 250W RMS @ 2Ω. With a remarkably low distortion rate of 0.02% THD, it’s the perfect choice for your motorcycle audio system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Nominal Power (RMS) @ 14.4 VDC, THD 1%:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4 Ch:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e160 W x 4 (4Ω)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e250 W x 4 (2Ω)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3 Ch:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e160 W x 2 (4Ω) + 500 W x 1 (4Ω)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e250 W x 2 (2Ω) + 500 W x 1 (4Ω)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2 Ch:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e500 W x 2 (4Ω)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTotal Power RMS:\u003c\/strong\u003e\u003cspan\u003e 1000 W\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDyno Specs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBox rating: 160 watts at 4Ω, Dyno reads 173 watts at 4Ω\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBox rating: 250 watts at 2Ω, Dyno reads 288 watts at 2Ω\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eReady to Elevate Your Ride?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAt Volunteer Audio, we’re committed to providing you with an amazing sound system for your Harley Davidson. Our Stage 4 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!\u003c\/span\u003e\u003c\/p\u003e","brand":"Hertz","offers":[{"title":"Default Title","offer_id":47687861928153,"sku":"HDPKG1687","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/7389\/9481\/files\/24-Up-Stage-4-TP-Ultimate-RG.jpg?v=1767970486","url":"https:\/\/volunteeraudio.com\/products\/hdpkg1687-hertz-stage-4-road-glide-upgrade","provider":"Volunteer Audio","version":"1.0","type":"link"}