More about the product
The Hertz HMS 12 S2 LD-SW is a premium marine subwoofer designed to deliver powerful bass performance in open-water environments. Built with marine-grade materials and advanced engineering, this model ensures durability and consistent sound quality even under harsh conditions.
The HMS 12 S2 LD-SW features a 12-inch polypropylene cone that is resistant to moisture and UV rays, making it ideal for marine applications. Its robust construction guarantees accurate low-frequency reproduction while withstanding exposure to salt, humidity, and sunlight. Operating at 2 ohms, the subwoofer offers efficient power handling and works seamlessly with a wide range of marine amplifiers.
The motor structure includes a high-density ferrite magnet and a long-excursion design, enabling the HMS 12 S2 LD-SW to produce deep, punchy bass without distortion. The suspension system is optimised for marine environments, ensuring reliable performance even during extended high-volume playback. The frame and grille are coated for corrosion resistance, adding to its long-term durability.
Installation is simple thanks to its infinite baffle design, which allows the subwoofer to be mounted directly into a boat’s hull without requiring a dedicated enclosure. This makes it perfect for marine setups where space is limited but high-quality bass is essential.
A standout feature is the integrated RGB LED lighting system, which adds a stylish touch to any boat interior. The waterproof lighting system offers customisable colour options, creating an ambient glow that enhances the overall aesthetic without compromising durability.
With a power handling capability of up to 500 watts RMS and 1000 watts peak, the HMS 12 S2 LD-SW delivers strong, impactful bass that complements full-range marine speakers. It is engineered to perform reliably in environments where traditional car audio components would fail, making it a top choice for marine enthusiasts seeking premium sound.
Technical details
- Brand
- Hertz
- Cone
- Polypropylene with UV inhibitors
- Continuous Power Handling
- 500WRMS
- Impedance
- 2Ω
- Magnet
- High density flux ferrite
- Mounting Depth
- 140.6mm
- Peak Power
- 1000W
- Size
- 12 inches
Look out for Bankstown Sound Recommendations
The Hertz HMS 12 S2 LD-SW is ideal for boat owners who want premium bass without sacrificing durability. It suits high-end marine audio systems where space is limited, thanks to its infinite baffle design. Compared to cheaper marine subwoofers, it offers superior build quality, corrosion resistance, and integrated LED lighting for added style. While it requires a suitable amplifier to reach its full potential, it is perfect for those seeking reliable, powerful bass in open-water environments.
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.

