More about the product
The Hertz HMP4D is a compact four-channel amplifier designed for powersport and marine audio systems where space is limited but high-quality sound is essential. Built for durability, the HMP4D features a rugged design that resists corrosion and moisture, making it ideal for harsh outdoor environments. Its sealed chassis ensures reliable operation even in challenging conditions.
This amplifier is engineered to deliver clean and powerful sound across four channels. Using Class D technology, the HMP4D provides efficient power delivery while minimising heat generation, which is critical for installations in confined spaces. Despite its small footprint, it offers impressive output, making it suitable for powering full-range speakers and subwoofers in UTVs, ATVs, motorcycles, and boats.
Connectivity is simple and practical. The HMP4D includes RCA inputs for easy integration into existing audio systems and corrosion-resistant terminals for secure connections. Its compact size allows flexible mounting options, and the design ensures long-term reliability without compromising performance.
The HMP4D focuses on pure amplification without unnecessary extras. It does not include Bluetooth or streaming features, keeping the design dedicated to delivering strong, clean audio. Installation is straightforward for those familiar with audio setups, but professional installation may be recommended for optimal results.
This amplifier is perfect for enhancing sound quality in compact audio systems, delivering clear and dynamic audio that complements the overall listening experience. Its combination of rugged construction, efficient performance, and small size makes it a practical choice for anyone upgrading their powersport or marine audio system.
Technical details
- Brand
- Hertz
- Channels
- 4-Feb
- Impedance
- @ 2 Ch: 4 Ω|@ 4 Ch: 2 Ω
- Output Power
- 2 Ch: 130 W x 2 (4Ω)|3 Ch: 50 W x 2 (4Ω) + 130 W x 1 (4Ω)|3 Ch: 65 W x 2 (2Ω) + 130 W x 1 (4Ω)|4 Ch: 50 W x 4 (4Ω)|4 Ch: 65 W x 4 (2Ω)
- Size
- 8.77 x 3.95 x 1.71 inches
- Total Power
- 600W
- Weight
- 1.35kg
Look out for Bankstown Sound Recommendations
The Hertz HMP4D is ideal for UTV, ATV, motorcycle, and marine audio systems where space is limited but high-quality sound is desired. It suits those who value durability and efficiency in harsh conditions. Compared to larger amplifiers, it offers easier installation and better reliability outdoors. However, it does not include wireless features or DSP tuning, so those seeking advanced control may prefer a more feature-rich model. For anyone focused on powering speakers and subwoofers with clean, powerful audio in a compact form, the HMP4D 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.