American Hard Bag Modular Bass System for 2023.5-Up Harley Davidson® Touring Motorcycles

American Hard Bag Modular Bass System

Available with Your Choice of Hertz® or Velocity® 10-Inch Subwoofers

More than a subwoofer. A complete bass system engineered specifically for the 2023.5+ Harley-Davidson Touring platform.

Experience the bass your Harley has been missing without permanently giving up the saddlebag storage you depend on.

The American Hard Bag Modular Bass System is engineered specifically for 2023.5 and newer Harley-Davidson Touring motorcycles, combining precision roto-molded enclosures with your choice of premium 10-inch subwoofers and integrated 8-inch passive radiators.

Unlike traditional saddlebag subwoofer systems that rely on the entire saddlebag as the acoustic enclosure, each American Hard Bag enclosure is completely self-contained. This innovative design delivers deeper, cleaner bass while allowing your saddlebag lid speakers to perform without being affected by unwanted air pressure inside the saddlebag.

The result is a system that sounds better, installs cleaner, preserves your motorcycle’s handling characteristics, and gives you the flexibility to reclaim your storage space whenever your ride requires it.

A Modular Bass System Designed Around the Way You Ride

One of the biggest compromises with most Harley-Davidson saddlebag subwoofer systems is the permanent loss of valuable storage space.

The American Hard Bag Modular Bass System eliminates that compromise.

Each enclosure securely mounts inside your factory saddlebag using the original mounting locations while remaining completely removable. Whether you’re commuting, heading out for a weekend ride, or packing for a cross-country adventure, your motorcycle can be configured in just minutes.

Three Ways to Ride:

Maximum Bass

Install both enclosures and experience the full performance of a true dual-subwoofer system.

Maximum Flexibility

Need room in one saddlebag?

Simply remove one enclosure while leaving the other installed. You’ll retain impressive bass performance while regaining the full storage capacity of the opposite saddlebag.

Maximum Storage

Planning a long trip?

Remove both enclosures and restore the full storage capacity of both factory saddlebags.

When you’re ready for incredible sound again, simply reinstall the enclosures and reconnect the included plug-and-play wiring harness.

Bass when you want it. Storage when you need it.

Note: This system installs inside your existing factory Harley-Davidson saddlebags. Saddlebags are required and are not included.

A Better Way to Build Bass

Traditional Harley-Davidson saddlebag subwoofer systems often rely on the entire saddlebag as the acoustic enclosure.

That means every bass note creates pressure throughout the saddlebag, forcing your lid speakers to work against constantly changing air pressure. Many systems require additional baffles or isolation panels behind the lid speakers simply to maintain proper performance.

The American Hard Bag system was engineered differently.

Each enclosure houses a dedicated 10-inch subwoofer paired with an 8-inch passive radiator inside its own precision-engineered roto-molded enclosure.

Because the enclosure is completely self-contained, low-frequency energy remains inside the enclosure not inside your saddlebag.

• The benefits are substantial.
• Saddlebag lid speakers perform naturally without unwanted pressure loading.
• No additional baffles or isolation panels are required behind your lid speakers.
• The passive radiator delivers deeper bass and greater efficiency than traditional compact sealed designs.
• Midbass and sub-bass work together instead of competing against one another.
• Every speaker on the motorcycle performs as part of one balanced audio system.
• The result is deeper bass, greater clarity, and a more natural listening experience.

Engineered for Performance Without Compromising Your Ride

Adding bass to a Harley-Davidson shouldn’t come at the expense of the motorcycle’s handling, balance, or touring capability.

From the very beginning, the American Hard Bag Modular Bass System was engineered with weight, efficiency, and real-world usability as primary design goals.

Each fully assembled enclosure weighs approximately 17 pounds, keeping the system within Harley-Davidson’s recommended saddlebag load capacity. The result is exceptional bass performance while preserving the balanced handling characteristics riders expect from their motorcycle.

Rather than relying on oversized amplifiers and excessive power to create bass, this system has been engineered for efficiency. The combination of the precision enclosure, optimized passive radiator, and carefully matched subwoofer produces impressive output while making exceptional use of every watt available from your amplifier.

Designed to Deliver:

• Approximately 17.8 pounds per enclosure
• Designed within Harley-Davidson’s recommended saddlebag load limits
• Preserves the motorcycle’s natural handling characteristics
• Outstanding bass output without requiring excessive amplifier power
• Efficient acoustic design that maximizes every watt

Because the best motorcycle audio upgrade shouldn’t make your motorcycle feel like a compromise.

Designed for Volunteer Audio Stage Systems

This package has been engineered specifically as an expansion for Volunteer Audio’s Hertz Stage 2 and Stage 4 audio systems.

The amplifier configuration is simple and effective.

Front amplifier channels power up to four full-range speakers.

Rear amplifier channels power the dual subwoofers.

No additional amplifier is required when installed with the recommended Volunteer Audio Stage systems.

The result is a properly balanced system with crystal-clear highs, dynamic midrange, and deep, authoritative bass.

The American Hard Bag Modular Bass System is available with your choice of two premium 10-inch subwoofers.

Both have been extensively tested in this enclosure and both deliver exceptional performance. Neither is better. They simply have different personalities.

Velocity Performance Edition

Engineered Specifically for the American Hard Bag Enclosure

The Velocity 10-inch subwoofer wasn’t selected from an existing catalog.

It was engineered specifically for the American Hard Bag enclosure, creating a system where the driver, enclosure, and passive radiator were developed together as a complete acoustic package.

Rated at 300 Watts RMS and 600 Watts Maximum Power, the Velocity subwoofer features an injection-molded cone, Santoprene surround, oversized 56-ounce ferrite motor, and a 38 mm TIL voice coil to deliver exceptional punch, musicality, and long-term reliability.

If your playlist is filled with country, rock, blues, classic rock, or live recordings, the Velocity Performance Edition delivers outstanding impact and natural musical accuracy.

Ideal For: Country, Rock, Classic Rock, Southern Rock, Blues, and Live Recordings

Performance Highlights:

• 300 Watts RMS
• 600 Watts Maximum Power
• Frequency Response: 20-400 Hz
• Injection-Molded Cone
• Santoprene Surround
• 38 mm TIL Voice Coil
• 56 oz Ferrite Magnet

Expect:

• Tight, punchy bass
• Incredible kick drum impact
• Excellent bass guitar definition
• Fast transient response
• Natural, musical low frequencies

Hertz Reference Edition

Legendary Hertz Performance

The Hertz CS 250 S2 has earned a reputation for delivering exceptionally deep, controlled bass from compact enclosures, making it an ideal match for the American Hard Bag Modular Bass System.

Rated at 300 Watts RMS and 600 Watts Maximum Power, the CS 250 S2 utilizes a high-density ferrite motor, polypropylene cone, and precision-engineered suspension to reproduce the lowest octaves with outstanding authority and control.

If your music library includes hip-hop, rap, EDM, pop, or other bass-heavy genres, the Hertz Edition delivers the effortless low-frequency extension that brings those tracks to life.

Ideal For: Hip-Hop, Rap, EDM, Pop, R&B, and Bass-heavy playlists

Performance Highlights:

• 300 Watts RMS
• 600 Watts Maximum Power
• 2 Ohm Voice Coil
• Polypropylene Cone
• High-Density Ferrite Magnet
• 35 mm Voice Coil

Expect:

• Exceptional low-frequency extension
• Smooth, effortless bass reproduction
• Powerful sub-bass authority
• Outstanding musical accuracy

Volunteer Audio Recommendation

At Volunteer Audio, we’ve spent countless hours listening to, tuning, and testing both versions of this system.

Rather than offering a one-size-fits-all solution, we chose to offer two distinct subwoofer options because each excels with different styles of music.

If your playlist is primarily country, rock, blues, or live recordings, we generally recommend the Velocity Performance Edition. It delivers exceptional punch, outstanding musicality, and was engineered specifically for the American Hard Bag enclosure.

If your music leans toward hip-hop, rap, EDM, or you simply want to reproduce the deepest notes possible, we recommend the Hertz Reference Edition for its exceptional low-frequency extension.

There isn’t a better version.

There’s simply the version that’s better suited to the music you enjoy most.

If you’re unsure which system is right for you, give our team a call. We’ll be happy to help you choose the perfect setup for your motorcycle and your listening preferences.

Complete Kit Includes

• Left American Hard Bag modular enclosure
• Right American Hard Bag modular enclosure
• Two 10-inch subwoofers (Velocity or Hertz, depending on the model selected)
• Two integrated 8-inch passive radiators
• Plug-and-play amplifier-to-saddlebag wiring harness
• Saddlebag vent assemblies
• Precision vent cutting template
• Saddlebag vent installation hardware
• Complete mounting hardware
• All required installation components

Compatible With:

2023.5 and newer Harley-Davidson Touring motorcycles equipped with the redesigned saddlebags

Volunteer Audio Hertz A2B Stage 2 Systems

Volunteer Audio Hertz A2B Stage 4 Systems

Why We Sell This System

At Volunteer Audio, we evaluate every product using one simple question:

Would we install it on our own motorcycles?

After extensive testing, the American Hard Bag Modular Bass System earned a place in our lineup because it solves the biggest compromises that have traditionally come with adding bass to a Harley-Davidson.

It delivers exceptional low-frequency performance without permanently sacrificing your saddlebag storage. It preserves the motorcycle’s handling characteristics through an efficient, lightweight design. It integrates seamlessly with our Stage audio systems. And thanks to its modular design, it adapts to the way riders actually use their motorcycles.

That’s why we’re proud to offer it.

Designed for the Way You Actually Ride:

• Some days your Harley is your weekend toy.
• Some days it’s your daily transportation.
• Sometimes it’s loaded for a thousand-mile road trip.
• Other times you’re riding with empty saddlebags and your favorite playlist turned all the way up.

The American Hard Bag Modular Bass System was engineered for every one of those rides:

• Install both enclosures when you want maximum bass.
• Remove one when you need additional cargo space.
• Remove both when your touring plans require every inch of storage.
• No permanent sacrifice.
• No unnecessary weight.
• No compromise in the way your motorcycle rides.
• Just exceptional sound whenever you want it.