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
Frequently Asked Questions
In addition to shipping all over Australia with Australia Post, we also offer in-store pickup from our Bankstown, NSW store. From the checkout, you're able to select between shipping methods, regular, Express, or In-Store Pickup. For more information on Bankstown Sound shipping, please read more here.
We offer installation services for everything we sell. Our installations come with a lifetime warranty and are performed at our Bankstown, NSW workshop by Car Audio installation specialists with over 25+ years experience. Please contact us for an installation quote if you're wanting us to do it for you.
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.


