Hertz A2B Stage 4 Ultimate Plug & Play Amp And Speaker Package with Subwoofer Kit For 2024-Up Harley Davidson® Base Model Road Glide Motorcycles with Saddlebag Lids

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 at Volunteer Audio, and we’re here to offer a solution that will blow you away.

Our Volunteer Audio Stage 4 amplifier and speaker system is designed to transform your audio experience. This package allows you to keep your factory radio while upgrading your sound system. To get the full potential from your new amplifier and speakers, a flash is required to optimize performance. With this setup, you’ll enjoy music that’s loud and clear even at speeds up to 100 mph!

What Makes This System Exceptional?

• Weather-Resistant Components: The amplifier is compact and IP64 rated, ensuring durability in all weather conditions. The Hertz speakers feature weather-resistant cones that can withstand moisture and the elements, perfect for Harley Davidson environments.

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: High-quality replacements for your saddlebag lid factory speakers.
• Speaker Cut-In Kit for Lids: This kit includes a template, grilles, and brackets to properly install the 6×9” speakers into your saddlebag lids, ensuring a secure fit and optimal sound placement. These cut-kits only fit in factory lids that do not have factory speaker provisions.

Why Choose Volunteer Audio?

Pre-Configured Kit: We complete all the prep work, 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. You only need to 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 get the help you need.

---

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.

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!