{"product_id":"hdpkg1681-hertz-stage-4-cvo-street-glide-upgrade","title":"Hertz Stage 4 Plug \u0026 Play Amp And Speaker Package with Subwoofer Kit For 2023.5-Up Harley Davidson® CVO Street Glide Motorcycles","description":"\u003cp\u003e\u003cstrong\u003eCan you hear your factory Harley speakers loud and clear at highway speeds?\u003c\/strong\u003e We didn’t think so. \u003cstrong\u003eTired of blowing those factory speakers just trying to hear them?\u003c\/strong\u003e Of course you are! These are common issues we hear ALL the time at Volunteer Audio. That’s why we’re here to deliver a sound experience that will truly blow you away. \u003cstrong\u003eCan you really hear rear speakers when added to your bike?\u003c\/strong\u003e Absolutely! We get this question frequently, and the answer is a resounding YES. Here’s how we ensure you get the full benefit from your rear speakers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Speaker Positioning:\u003c\/strong\u003e For 6x9” speakers, we use custom cut-in kits that elevate the speakers higher in the lid. This not only saves space in your bag but also angles the speakers toward you, improving sound clarity. Most replacement lids don’t do this.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProper Powering:\u003c\/strong\u003e We make sure the rear speakers are properly powered so they’re loud enough to be heard even from behind.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced Sound:\u003c\/strong\u003e While front speakers will always be louder due to their direct orientation, rear speakers add a fuller, surround sound experience with enhanced mid-bass, creating a concert-like atmosphere.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOur Comprehensive Audio Upgrade Package Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Wired Amplifier:\u003c\/strong\u003e Gains and filters are adjusted perfectly for your factory Skyline OS Infotainment radio.\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\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 SX690H NEO 6x9” Saddlebag Lid Speakers: \u003c\/strong\u003eDesigned 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLengthened Rear Backbone Harness and Modified T-Harness:\u003c\/strong\u003e Designed for an optimal fit and function.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Choose Volunteer Audio?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Configured Kit:\u003c\/strong\u003e We handle all the prep work, including setting gains and filters, so you don’t have to. The kit arrives as close to finished as possible, making installation straightforward.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Installation:\u003c\/strong\u003e Includes mounting hardware and clear step-by-step videos. All you need to do is mount the amplifier, connect the wiring to under the seat and battery, and install the speakers.\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\u003cbr\u003e\u003c\/div\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eHertz SP4.900 Amplifier\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\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. \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 style=\"font-weight: 400;\"\u003e160 W x 4 (4Ω)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\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 style=\"font-weight: 400;\"\u003e160 W x 2 (4Ω) + 500 W x 1 (4Ω)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\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 style=\"font-weight: 400;\"\u003e500 W x 2 (4Ω)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTotal Power RMS:\u003c\/strong\u003e\u003cspan style=\"font-weight: 400;\"\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 style=\"font-weight: 400;\"\u003eBox rating: 160 watts at 4Ω, Dyno reads 173 watts at 4Ω\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\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\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\/p\u003e","brand":"Hertz","offers":[{"title":"Default Title","offer_id":47687749370073,"sku":"HDPKG1681","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/7389\/9481\/files\/24-Up-CVO-Stage-4-6x9-Ultimate-SG.jpg?v=1767971809","url":"https:\/\/volunteeraudio.com\/products\/hdpkg1681-hertz-stage-4-cvo-street-glide-upgrade","provider":"Volunteer Audio","version":"1.0","type":"link"}