The Hertz HSP1-24 A2B Harley Stage 1 stereo system is a plug-and-play motorcycle audio upgrade designed specifically for 2024 and newer Harley-Davidson Touring motorcycles equipped with the factory A2B audio platform. This system focuses on improving the front audio stage by adding dedicated amplifier power and high-efficiency speakers while maintaining full compatibility with the factory Harley radio system.

Factory motorcycle audio systems often struggle to overcome wind noise and road noise at highway speeds. The HSP1-24 A2B system addresses this by combining high-sensitivity SPL speakers with a compact four-channel amplifier, allowing riders to enjoy clearer music and stronger sound projection while riding.

This upgrade is ideal for riders who want a clean, efficient Harley audio upgrade without installing rear saddlebag speakers or a full multi-stage audio system.

Explore more Harley stereo upgrades
→ /collections/harley-stereo-kits

Key Features

• Complete Harley Stage 1 motorcycle stereo upgrade
• Designed for 2024+ Harley-Davidson Touring motorcycles with A2B audio
• Includes Hertz SX165 NEO 6.5-inch SPL speakers
• Compact Hertz SP 4.900 four-channel motorcycle amplifier
• HD A2B interface module for factory radio integration
• Plug-and-play Harley-specific wiring and connectors
• Designed for vibration resistance and motorcycle riding conditions

This system provides a noticeable improvement in sound clarity and volume compared to the factory Harley audio system.

What’s Included in the HSP1-24 A2B Kit

The HSP1-24 A2B system includes the core components required to upgrade the front audio stage on compatible Harley touring motorcycles.

Included components:

• (2) Hertz SX165 NEO 6.5-inch SPL coaxial speakers
• Hertz SP 4.900 four-channel Class-D amplifier
• HD A2B interface module
• HHP-14 power and ground cable
• Hog badge replacement logos for speaker grilles
• mounting hardware and installation accessories

These components combine to create a powerful front-stage Harley audio upgrade designed to deliver clearer sound at highway speeds.

Harley Davidson Fitment

The Hertz HSP1-24 A2B system is designed specifically for 2024 and newer Harley-Davidson Touring motorcycles equipped with the factory A2B audio platform.

Compatible motorcycles may include:

• Street Glide
• Road Glide
• Road Glide Limited
• other Harley touring models using A2B digital audio architecture

The included A2B interface module allows the amplifier to integrate with the factory Harley radio system while maintaining full radio functionality.

High-Efficiency SPL Front Speakers

The system uses Hertz SX165 NEO SPL speakers, designed specifically for motorcycle audio environments where strong sound projection is required.

These speakers feature:

• lightweight neodymium magnet motor structures
• treated cones designed for outdoor environments
• high sensitivity for stronger sound projection
• improved vocal clarity compared to factory Harley speakers

These characteristics allow riders to hear music more clearly while riding at highway speeds.

SP 4.900 Motorcycle Amplifier

At the center of the system is the Hertz SP 4.900 four-channel amplifier, engineered specifically for motorcycle audio installations.

Amplifier highlights include:

• 160 watts RMS × 4 channels at 4 ohms
• 250 watts RMS × 4 channels at 2 ohms
• up to 1000 watts total system power
• compact chassis designed for motorcycle mounting locations
• efficient Class-D amplifier design for reliability

The amplifier provides the additional power needed to dramatically improve the performance of the front speakers.

A2B Integration Module

Modern Harley touring motorcycles use A2B digital audio networking, which requires specialized integration when upgrading the factory audio system.

The included HD A2B interface module allows the aftermarket amplifier to connect directly to the Harley audio network while preserving factory radio controls and system functionality.

This integration makes it possible to upgrade the sound system while maintaining the original Harley interface.

Harley Audio Upgrade Stages

Many riders upgrade their Harley audio system in stages depending on how much output they want.

Stage 1 Upgrade
Front speakers and amplifier power for improved clarity and volume.

Stage 2 Upgrade
Adds stronger front-stage performance and additional speaker output.

Stage 3 Upgrade
Adds rear saddlebag speakers to create a full front-and-rear amplified system.

The HSP1-24 A2B system represents the Stage 1 upgrade, providing a strong improvement over the factory Harley stereo system.

Pair With These Motorcycle Audio Upgrades

Riders building a complete Harley audio system often combine this kit with additional upgrades.

Motorcycle Speakers
→ /collections/motorcycle-speakers

Motorcycle Amplifiers
→ /collections/motorcycle-amplifiers

Complete Motorcycle Audio Systems
→ /collections/motorcycle-audio

These upgrades allow riders to build powerful Harley bagger audio systems capable of delivering clear sound at highway speeds.

Specifications

Amplifier: SP 4.900 Class-D
Amplifier Power: 160W × 4 @ 4Ω / 250W × 4 @ 2Ω
Speakers: SX165 NEO 6.5-inch SPL coaxial speakers
Integration: HD A2B interface module
Power Cable: HHP-14 power and ground cable

Frequently Asked Questions

Will the HSP1-24 A2B work on my 2024 Harley touring motorcycle?

Yes. This system is designed for 2024 and newer Harley-Davidson Touring motorcycles equipped with the factory A2B audio platform.

Does this system include an amplifier?

Yes. The kit includes the Hertz SP 4.900 four-channel amplifier, which provides significantly more power than the factory Harley radio.

What makes this a Stage 1 Harley stereo upgrade?

A Stage 1 upgrade improves the front audio stage by adding amplifier power and upgraded speakers without adding rear saddlebag speakers.

Can this system be expanded later?

Yes. Many riders begin with a Stage 1 system and later upgrade to Stage 2 or Stage 3 systems by adding additional speakers.

Will this help with highway riding noise?

Yes. High-efficiency SPL speakers combined with amplifier power improve sound projection so music can be heard more clearly while riding.

Is professional installation recommended?

Yes. Motorcycle audio upgrades require proper wiring, amplifier mounting, and tuning. Professional installation helps ensure the system performs reliably.

Professional Harley Audio Installation

Stereo Installs specializes in Harley-Davidson stereo upgrades and motorcycle audio installation.

Our shop installs motorcycle sound systems for riders throughout Northeast Ohio including:

Mentor, Willoughby, Eastlake, Painesville, Cleveland

Stereo Installs
7471 Tyler Blvd STE B
Mentor Ohio 44060

(440) 525-2001

Our services include:

• Harley stereo installation
• motorcycle amplifier installation
• speaker upgrades
• custom bagger audio systems

Professional installation ensures proper wiring, system tuning, and long-term reliability.