More about the product
The Hertz HMD1 is a compact mono marine amplifier designed to deliver strong and clean bass performance in marine environments. Built for durability, this amplifier features a corrosion-resistant design to handle exposure to moisture, salt, and vibration. Its rugged construction ensures reliable operation on boats and other outdoor applications.
The HMD1 is engineered to power subwoofers efficiently. It delivers high output in a small footprint, making it easy to install in tight spaces without sacrificing performance. With Class D technology, the HMD1 provides efficient power delivery while minimising heat generation, which is essential for marine installations where ventilation can be limited.
Connectivity is simple, with RCA inputs for easy integration into existing audio systems. The amplifier also includes corrosion-resistant power and speaker terminals for secure and long-lasting connections. Its compact size and sealed design make it suitable for mounting in various locations on a vessel, ensuring flexibility during installation.
The HMD1 focuses on delivering pure, high-quality amplification for subwoofers without unnecessary extras. It does not include Bluetooth or wireless streaming features, keeping the design dedicated to its purpose. Installation is straightforward for those familiar with marine audio setups, but professional installation may be recommended for optimal results.
This amplifier is perfect for enhancing low-frequency response in marine audio systems, providing deep and powerful bass that complements the overall sound experience. Its robust design and efficient performance make it a practical choice for anyone upgrading their marine audio system.
Technical details
- Brand
- Hertz
- Channels
- 1
- Impedance
- 1Ω
- Output Power
- 1000W @ 1Ω|500W @ 4Ω|800W @ 2Ω
- Size
- 9.56 x 1.8 x 6.25 inches
- Total Power
- 1000W
- Weight
- 1.98kg
Look out for Bankstown Sound Recommendations
The Hertz HMD1 is ideal for boat owners seeking strong bass performance in a marine audio system. It suits those who value durability and efficiency in harsh conditions. Compared to cheaper amplifiers, it offers better protection and reliability, while its compact size makes installation easier. However, it does not include wireless features or multi-channel capability, so those seeking full-range amplification may prefer a larger marine amplifier. For anyone focused on powering subwoofers with clean, powerful bass, the HMD1 is an excellent choice.
Why Choose Bankstown Sound for Your Car Audio & Tech Upgrades
At our Bankstown Sound store and workshop in Sydney, our team ensures every car and auto audio installation and upgrade starts with an understanding of how you use your car. Our team works with you to understand your driving habits, the features you rely on, and the problems you’re trying to solve.
Most factory setups are built to broad standards and often lack the clarity or seamless connectivity required for how people actually drive. That’s why we focus on modernising your dashboard and audio performance based on how you use your vehicle.

