Hertz SP 1.900 Motorcycle Amplifier | 1000W RMS Mono Harley Bagger Subwoofer Amp
If you're building a Harley Davidson motorcycle stereo system that needs real bass, the Hertz SP 1.900 motorcycle amplifier delivers the power required to drive high-output subwoofers in compact motorcycle installations.
The Hertz SP 1.900 is a high-power mono Class-D motorcycle amplifier capable of delivering up to 1000 watts RMS, designed for Harley bagger audio systems, motorcycle bass upgrades, and powersports installations where space is limited but performance matters.
Part of the Hertz SPL Show Series, this amplifier uses an Advanced D-Class output stage designed for high efficiency, allowing the amplifier to deliver strong subwoofer output while minimizing heat and electrical load on the motorcycle charging system.
With its compact IP55-rated aluminum chassis, the SP 1.900 is built to handle vibration, humidity, and harsh outdoor environments that motorcycles commonly encounter.
Whether you're installing a Harley saddlebag subwoofer system, bagger bass upgrade, or compact motorcycle subwoofer enclosure, the SP 1.900 provides the clean power needed to deliver deep, controlled bass while riding.
Browse our complete motorcycle audio equipment here:
Motorcycle Audio Collection
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Hertz SP 1.900 mono motorcycle amplifier for Harley Davidson bagger subwoofer systems
Need Help Choosing the Right Motorcycle Amplifier?
Stereo Installs specializes in Harley Davidson stereo upgrades and motorcycle audio systems.
If you're planning a motorcycle audio upgrade with a subwoofer, our team can help recommend the right amplifier and speaker setup for your bike.
đź“ž Call Stereo Installs
(440) 525-2001
Or Get a Quick Quote
What the Hertz SP 1.900 Motorcycle Amplifier Is
The Hertz SP 1.900 is a compact mono amplifier designed specifically for high-performance subwoofer systems in motorcycles and powersports vehicles.
Delivering up to 1000 watts RMS, the amplifier provides the output needed to drive high-efficiency motorcycle subwoofers while maintaining a compact installation footprint.
The amplifier is commonly used for:
• Harley bagger subwoofer upgrades
• saddlebag bass systems
• motorcycle audio systems with dedicated subwoofers
• compact bass systems for touring motorcycles
• powersports subwoofer installations
The SP 1.900 also includes Universal Speaker Simulators (USS), allowing the amplifier to integrate with factory radios that use speaker-load detection circuits.
This makes it possible to upgrade your Harley Davidson stereo system while keeping the factory head unit.
Browse more motorcycle amplifiers here:
Motorcycle Amplifiers Collection
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Hertz SP 1.900 compact waterproof mono motorcycle amplifier aluminum chassis
Why Riders Choose the Hertz SP 1.900 Amplifier
Motorcycle audio systems require amplifiers that deliver strong output while remaining efficient and compact.
The Hertz SP 1.900 was engineered specifically for these environments, making it ideal for motorcycle bass upgrades.
Key advantages include:
• 1000 watts RMS mono output for powerful subwoofer performance
• 1-ohm stable design for high-performance subwoofer systems
• high-efficiency Class-D amplifier architecture
• IP55 weather-resistant aluminum chassis
• compact size ideal for saddlebag and hidden installs
• factory radio compatibility via USS integration
These features make the SP 1.900 a popular amplifier for Harley Davidson bagger bass systems and motorcycle subwoofer installations.
Key Features of the Hertz SP1.900
• 1000W RMS mono motorcycle amplifier
• high-efficiency Class-D amplifier design
• 1-ohm stable output stage
• IP55 weather-resistant aluminum chassis
• Universal Speaker Simulators for factory radio integration
• adjustable low-pass crossover and bass boost
• phase adjustment for precise system tuning
Technical Specifications
Power Output
600W × 1 @ 4Ω
1000W × 1 @ 2Ω
1000W × 1 @ 1Ω
Total Output
1000W RMS
Audio Performance
Frequency Response
5Hz – 500Hz
Signal-to-Noise Ratio
95 dBA
Total Harmonic Distortion
0.1%
Damping Factor 300
Crossovers
Low-Pass Filter
50Hz – 250Hz (24dB/oct)
Subsonic Filter
25Hz (24dB/oct)
Bass Boost
0–8 dB @ 45Hz
Phase Adjustment
0° – 180°
Dimensions
8.33" Ă— 5.12" Ă— 1.93"
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rear connections and tuning controls on Hertz SP 1.900 mono subwoofer amplifier
Who the Hertz SP 1.900 Is Best For
The SP 1.900 amplifier is ideal for riders building high-performance motorcycle bass systems.
Common applications include:
• Harley bagger subwoofer systems
• saddlebag subwoofer installations
• compact motorcycle bass upgrades
• custom bagger audio builds
• Harley touring motorcycles with dedicated subwoofers
Because of its power-to-size ratio, the SP 1.900 is one of the most popular mono amplifiers used in Harley bagger audio systems.
Compatible Harley Davidson Models
The SP 1.900 is commonly installed in:
• Harley Street Glide
• Harley Road Glide
• Harley Electra Glide
• Harley Ultra Limited
• custom Harley bagger builds
Browse compatible speakers here:
Motorcycle Speakers Collection
Best Subwoofer Pairings for the SP 1.900
For maximum performance, the SP 1.900 amplifier is commonly paired with:
• compact motorcycle subwoofers
• Harley saddlebag subwoofer systems
• custom bagger bass enclosures
These setups allow riders to achieve deep bass performance while maintaining a clean motorcycle installation.
Installation & Fitment
Installing a motorcycle subwoofer amplifier requires careful planning to achieve the best performance.
Typical installation steps include:
• power and ground wiring installation
• RCA or speaker-level signal integration
• subwoofer wiring and enclosure setup
• amplifier mounting and vibration protection
• crossover and bass tuning
Because motorcycles have limited installation space, compact amplifiers like the SP 1.900 are ideal for hidden installations inside saddlebags or custom compartments.
If you're new to motorcycle audio upgrades, our guide explains how complete motorcycle stereo systems work:
Motorcycle Stereo Systems Explained
Professional Harley Davidson Stereo Installation in Mentor, Ohio
Stereo Installs specializes in Harley Davidson stereo upgrades and motorcycle audio systems.
Our shop installs:
• motorcycle speakers
• motorcycle amplifiers
• Harley bagger audio systems
• motorcycle subwoofer systems
• complete motorcycle stereo upgrades
Visit our shop:
Stereo Installs
7471 Tyler Blvd Ste B
Mentor, Ohio 44060
đź“ž (440) 525-2001
Serving riders across:
Mentor, Willoughby, Painesville, Cleveland, Lake County, Northeast Ohio
Frequently Asked Questions
Is the Hertz SP 1.900 good for motorcycle subwoofers?
Yes. The SP 1.900 delivers up to 1000 watts RMS mono output, making it ideal for powering motorcycle subwoofer systems.
Can the SP 1.900 run at 1 ohm?
Yes. The amplifier is stable at 1 ohm, allowing it to power high-performance subwoofer systems.
Will the SP 1.900 work with factory Harley radios?
Yes. The amplifier includes Universal Speaker Simulators (USS) that allow integration with factory head units that detect speaker load.
Shop Motorcycle Amplifiers & Harley Audio Upgrades
If you're building a Harley Davidson bagger stereo system with serious bass, the Hertz SP 1.900 mono amplifier delivers powerful subwoofer performance in a compact, motorcycle-ready design.
Browse more motorcycle amplifiers here:
Motorcycle Amplifiers Collection
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We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.