Hertz HSP3-24 A2B S3 4-Speaker Kit for 2024-Present Harley with Stage 3 Audio
PRODUCT INFORMATION
Hertz HSP3-24 A2B S3 4-Speaker Kit for 2024-Present Harley with Stage 3 Audio
$2,287.96
$2,287.96
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Hertz HSP3-24 A2B S3 4-Speaker Kit for 2024-Present Harley with Stage 3 Audio
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Hertz HSP3-24 A2B S3 4-Speaker Kit for 2024-Present Harley with Stage 3 Audio
The Hertz HSP3-24 A2B S3 is a four-speaker kit for 2024-Present Harley-Davidson motorcycles equipped with the factory Stage 3 audio package. It connects to the factory A2B audio system through the HD-A2B module and drives SX 165 NEO and SX 690 H NEO speakers from an SP 4.900 amplifier. The kit includes the HHP14 power and ground cable and Hog Badges for the front and rear speaker grilles. It is the Stage 3 version; bikes with the Base audio package use the HSP3-24 A2B Base.
Stage 3 Audio Package Kit
Four Hertz speakers on the factory A2B system for Stage 3 equipped bikes.
- HD-A2B digital interface module
- SP 4.900 + SX 165 NEO + SX 690 H NEO
- HHP14 power cable and Hog Badges
Key Product Details
| Kit Model / SKU | HSP3-24 A2B S3 |
| Brand | Hertz (Elettromedia) |
| Audio Package | Bikes equipped with the factory Stage 3 audio package |
| Vehicle Application | 2024-Present Harley-Davidson with factory A2B audio |
| Signal Interface | HD-A2B digital interface module |
| Amplifier | Hertz SP 4.900 four-channel |
| Front Speakers | Hertz SX 165 NEO 6.5-inch coaxials (pair) |
| Rear Speakers | Hertz SX 690 H NEO 6×9 three-way (pair) |
| Speaker Impedance | 4Ω per speaker |
| Power Wiring | HHP14 power and ground cable |
| Badges | Hog Badges for front and rear speaker grilles |
| Saddlebag Lid Kit | Not included in this version |
| Speakers in Kit | Four |
For 2024-Present Harley-Davidson motorcycles equipped with the factory Stage 3 audio package. Verify your model, year and audio package before ordering.
Hertz A2B Audio for 2024-Present Stage 3 Harley-Davidson
Harley's 2024-Present touring platform sends audio over the A2B digital bus. The HSP3-24 A2B S3 uses the HD-A2B module to bring that signal into the SP 4.900, which powers two SX 165 NEO front speakers and two SX 690 H NEO 6×9 speakers.
Hertz builds this version for bikes that came with the factory Stage 3 audio package. It does not include a saddlebag lid kit; the Hog Badges are supplied for the front and rear speaker grilles.
HD-A2B Interface: Digital interface module for the factory A2B audio system.
SP 4.900 Amplifier: IP55 D-class, rated 160W RMS × 4 at 4Ω.
Front Pair: SX 165 NEO two-way coaxials, 4Ω, 100W continuous each.
Rear Pair: SX 690 H NEO 6×9 three-way coaxials, 4Ω, 130W continuous each.
What's Included and Specifications
| HD-A2B Digital Interface Module | Hertz A2B digital interface that connects the kit to the bike's factory A2B audio system. |
| Hertz SP 4.900 Four-Channel Amplifier | IP55 D-class amplifier rated 160W RMS × 4 at 4Ω, 250W RMS × 4 at 2Ω or 500W RMS × 2 bridged at 4Ω, with USS for factory head units that use speaker load detection. |
| Hertz SX 165 NEO Coaxial Speakers | 6.5-inch two-way SPL coaxials, 4Ω, 100W continuous / 200W peak, 96.5dB sensitivity, neodymium motors and water-repellent, anti-UV cones. |
| Hertz SX 690 H NEO 3-Way Speakers | 6×9-inch three-way coaxials, 4Ω, 130W continuous / 260W peak, 94dB sensitivity, 1.4-inch dome tweeter plus 1-inch super tweeter. |
| HHP14 Power and Ground Cable | Power and ground wire kit for the SP 4.900. |
| Hog Badges | Hertz replacement badges for the front and rear speaker grilles. |
Kit contents are listed as published on the Elettromedia (Hertz) 2026 Hertz Moto price sheet. Component specifications are from Hertz product pages.
SP 4.900 Amplifier Specifications
| Amplifier Model | Hertz SPL Show SP 4.900 |
| Amplifier Type | Four-channel D-class amplifier (Hertz ADC output stage) |
| Output at 4Ω | 160W RMS × 4 channels at 14.4V |
| Output at 2Ω | 250W RMS × 4 channels at 14.4V |
| Bridged Output | 500W RMS × 2 channels at 4Ω, 14.4V |
| Total RMS Power | 1000W |
| Minimum Load | 2Ω in 4-channel mode / 4Ω bridged |
| Chassis Protection | IP55 aluminum chassis, no cooling fan, sealed power, input and speaker connections |
| Inputs | Pre-in (0.6–6 V RMS) and speaker-level in (2.2–22 V RMS) |
| Speaker Load Detection | USS (Universal Speakers Simulator) for head units with speaker load detection |
| Crossovers | Ch 1-2 high-pass / low-pass 50Hz–5kHz, Ch 3-4 high-pass 50Hz–5kHz, 12dB/octave |
| Bass Boost | 0–8dB (low-pass on only) |
| Bandwidth | 10Hz–35kHz (−3dB) |
| Signal-to-Noise Ratio | 105 dBA |
| THD | 0.02% at 100Hz, 4Ω, 70% rated power |
| Damping Factor | 200 |
| Power Supply | 11–15 VDC nominal / 6–16 VDC operating |
| Dimensions | 211.6 × 130 × 49 mm (8.3 × 5.1 × 1.9 in) |
| Weight | 2.15 kg |
SX 165 NEO Front Speakers
| Speaker Model | Hertz SPL Show SX 165 NEO |
| Speaker Type | 6.5-inch (165mm) two-way SPL coaxial |
| Quantity | One pair |
| Impedance | 4Ω |
| Power Handling | 100W continuous / 200W peak per speaker |
| Sensitivity | 96.5dB |
| Frequency Response | 100Hz–20kHz |
| Woofer Voice Coil | 38mm |
| Tweeter | 35mm (1.4 in) neodymium PEI dome with resettable protection circuit |
| Magnets | N38H neodymium |
| Cone | Water-repellent pressed paper with anti-UV treatment |
| Terminals | Double Faston terminals |
SX 690 H NEO Rear Speakers
| Speaker Model | Hertz SPL Show SX 690 H NEO |
| Speaker Type | 6×9-inch three-way coaxial (1.4-in dome tweeter + 1-in dome super tweeter) |
| Quantity | One pair |
| Impedance | 4Ω |
| Power Handling | 130W continuous / 260W peak per speaker |
| Sensitivity | 94dB |
| Frequency Response | 45Hz–24kHz (Hertz published) |
| Woofer Voice Coil | 38mm |
| Magnets | N38H neodymium |
| Cone | Water-repellent pressed paper with anti-UV treatment |
| Tweeter Protection | Resettable solid-state protection circuit |
| Terminals | Double Faston terminals |
Recommended System Planning
The HD-A2B module handles the factory A2B signal and the HHP14 cable powers the SP 4.900. The Hog Badges dress the speaker grilles with Hertz branding.
We install 2024-Present Harley audio at our Taylors, SC shop. A2B integration is where most DIY problems start, so call us before you begin.
Gain setting matters: At 4Ω the SP 4.900 is rated for 160W RMS per channel, which is more than the continuous rating of every speaker in this kit. Set the gains so each channel stays inside the speaker's continuous rating.
Confirm your audio package: Check whether your bike has the Stage 3 or Base audio package before ordering. The two kits are not interchangeable.
What to Pair With the HSP3-24 A2B S3
Everything to run the kit is in the box. These are the same parts sold on their own, plus power support.
Hertz SP 4.900 Amplifier
The IP55 four-channel amplifier used in every Hertz sound pack, sold on its own.
Hertz SX 165 NEO 6.5-inch Coaxials
The fairing coaxial pair from this kit, sold separately as a replacement or spare pair.
Hertz SX 690 H 6x9 Speakers
The 6x9 three-way pair used in the 2024-Present Hertz kits, sold separately.
Motorcycle Audio Batteries
Battery upgrades for builds that run the amplifier hard. Ask us whether your charging system needs one.
Related Hertz & Motorcycle Audio Paths
Build around the right parts for a 2024-Present A2B bike.
Best Use for the HSP3-24 A2B S3
2024-Present bikes equipped with the factory Stage 3 audio package that want Hertz speakers and amplification while keeping the factory A2B radio.
Built Around Real Motorcycle Audio
The HD-A2B module handles the digital signal, and the IP55 SP 4.900 handles the power. The Hog Badges finish the grilles.
Hertz HSP3-24 A2B S3 FAQ
What comes in the HSP3-24 A2B S3 kit?
The HD-A2B module, SP 4.900 amplifier, SX 165 NEO coaxial speakers, SX 690 H NEO 3-way speakers, HHP14 power and ground cable, and Hog Badges for the front and rear speaker grilles.
Which audio package is this kit for?
Bikes equipped with the factory Stage 3 audio package. Bikes with the Base audio package use the HSP3-24 A2B Base.
Is a saddlebag lid kit included?
No. The S3 version does not include a lid kit. The HSP3-24 A2B Base includes the HD24H saddlebag lid kit with speaker harness.
What impedance are the speakers?
All four speakers are 4 ohms.
What is the HD-A2B module?
The HD-A2B is the Hertz A2B digital interface included in the kit. It connects the SP 4.900 to the factory A2B audio system on 2024-Present Harley-Davidson models.
Is the amplifier power wiring included?
Yes. The HHP14 power and ground cable for the SP 4.900 is included.
How much power does the SP 4.900 make?
Hertz rates the SP 4.900 at 160W RMS × 4 at 4Ω, 250W RMS × 4 at 2Ω and 500W RMS × 2 bridged at 4Ω, 1000W RMS total at 14.4V.
Can the amplifier overpower the speakers?
Yes, if the gains are set too high. The SP 4.900 is rated 160W RMS per channel at 4 ohms, while the SX 165 NEO is rated 100W continuous and the SX 690 H 130W continuous.
Need Help Choosing?
Tell us your bike, model year and what you want to add, and we will confirm fitment and the right parts before you order.