Hertz Stage 4 Plug & Play Amp And Speaker Package with Subwoofer Kit For 2023.5-Up Harley Davidson® CVO Street Glide Motorcycles
Hertz Stage 4 Plug & Play Amp And Speaker Package with Subwoofer Kit For 2023.5-Up Harley Davidson® CVO Street Glide Motorcycles is backordered and will ship as soon as it is back in stock.
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Can you hear your factory Harley speakers loud and clear at highway speeds? We didn’t think so. Tired of blowing those factory speakers just trying to hear them? 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. Can you really hear rear speakers when added to your bike? 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:
- Optimal Speaker Positioning: 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.
- Proper Powering: We make sure the rear speakers are properly powered so they’re loud enough to be heard even from behind.
- Balanced Sound: 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.
Our Comprehensive Audio Upgrade Package Includes:
- Pre-Wired Amplifier: Gains and filters are adjusted perfectly for your factory Skyline OS Infotainment radio.
- Volunteer Audio HD-A2B8 Interface: Seamlessly integrates with your Harley Davidson, expertly tuned for Hertz systems.
- 1 Pair of Hertz SX165NEO 6.5” Upper Fairing Speakers: High-quality replacements for your factory speakers.
- 1 pair of Hertz SX690H NEO 6x9” Saddlebag Lid Speakers: Designed for clear sound and durability.
- Hertz Power/Ground Harness: Ensures reliable power and grounding.
- Lengthened Rear Backbone Harness and Modified T-Harness: Designed for an optimal fit and function.
Why Choose Volunteer Audio?
- Pre-Configured Kit: 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.
- Easy Installation: 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.
- Lifetime Tech Support: We offer lifetime support for any items purchased from us, ensuring you have assistance whenever needed.
Hertz / Cicada Audio Subwoofer Kit
Introducing the Hertz / Cicada Audio Add-On Subwoofer Kit—your new add-on bass solution built for our plug-and-play Hertz SP4.900 2-speaker and 4-speaker kits.
This ported and braced dual-10" subwoofer kit transforms your saddlebags into true bass enclosures using the included cut-in template. The 10" subs mount directly into the bag itself, delivering the deep, low-frequency punch your 6×9 speakers can’t reach.
Kit includes disconnect harness to still allow for easy removal of saddlebag.
This subwoofer kit is compatible only with our existing 2024+ plug-and-play Hertz SP4.900 2-speaker and 4-speaker kits when running from a single amplifier.
What's Included:
- (2) Hertz CS 250 S2 10" Subwoofers – Powerful 2-ohm subs delivering deep, controlled bass with 250W RMS per speaker.
- Cicada Audio 24HDRING10 – Left & Right precision mounting rings for perfect saddlebag integration.
- Cicada Audio 24HDRINGT – Left & Right trim rings for a complete, sealed fit.
- Cicada Audio 24HDPORT3 – Pair of Flush-mount, ABS-molded ports for optimized airflow and stronger low-end output.
- Plug-and-Play Wiring – easily ties into the Hertz SP4.900 amp.
- Hardware Pack – 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
HD-A2B8 Amplifier Replacement Interface
Hertz SP4.900 Amplifier
Our 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. Technical Specs:
Output Nominal Power (RMS) @ 14.4 VDC, THD 1%:
4 Ch:
160 W x 4 (4Ω)
250 W x 4 (2Ω)
3 Ch:
160 W x 2 (4Ω) + 500 W x 1 (4Ω)
250 W x 2 (2Ω) + 500 W x 1 (4Ω)
2 Ch:
500 W x 2 (4Ω)
Total Power RMS: 1000 W
Dyno Specs:
Box rating: 160 watts at 4Ω, Dyno reads 173 watts at 4Ω
Box rating: 250 watts at 2Ω, Dyno reads 288 watts at 2Ω
Ready to Elevate Your Ride?
At 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!














