More about the product
The Hertz HMS 12 B2 LD-C is a premium marine subwoofer designed to deliver deep, powerful bass in open-water environments. Built for durability and performance, this model combines robust materials with advanced acoustic engineering to ensure consistent sound quality even in harsh marine conditions.
The HMS 12 B2 LD-C features a 12-inch composite polypropylene cone that provides excellent rigidity and resistance to moisture. This design helps maintain accurate low-frequency reproduction while withstanding exposure to salt, humidity, and UV rays. The subwoofer is rated at 2 ohms, allowing for efficient power handling and compatibility with a wide range of marine amplifiers.
Its motor structure includes a high-density ferrite magnet and a long-excursion design, enabling the HMS 12 B2 LD-C to produce deep, punchy bass without distortion. The suspension system is optimised for marine use, ensuring reliable performance even during extended play at high volumes. The subwoofer’s grille and frame are coated for corrosion resistance, adding to its long-term durability.
Installation is straightforward thanks to its versatile mounting options. The HMS 12 B2 LD-C is designed for infinite baffle applications, meaning it can be mounted directly into a boat’s hull without requiring a dedicated enclosure. This makes it ideal for marine setups where space is limited but high-quality bass is essential.
The subwoofer’s LED lighting feature adds a stylish touch to any boat interior. Integrated RGB LEDs allow customisable colour options, creating an ambient glow that enhances the overall aesthetic. The lighting system is waterproof and designed to withstand marine conditions without compromising functionality.
With a power handling capability of up to 500 watts RMS and 1000 watts peak, the HMS 12 B2 LD-C 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 B2 LD-C 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.


