Hertz Marine HMS 12 B2-LD-C 12 Inch Sub 2 Ohm RGB LED Subwoofer 500w RMS
Couldn't Load Pickup availability
The Hertz Marine HMS 12 B2-LD-C is a 12-inch (300 mm) single voice coil marine subwoofer rated at 500W RMS (1000W peak), with a 2-ohm impedance, integrated RGB LED lighting, and a classic charcoal grille. It is part of the Hertz Marine HMS range and is designed for infinite baffle mounting.
This listing is for the classic charcoal (C) grille version at 2 ohm. The HMS 12 is also available as the Hertz Marine HMS 12 B4-LD-C (4 ohm, charcoal) and the Hertz Marine HMS 12 B2-LD-W (2 ohm, white grille). Sold as a single unit. RGB LED control requires the HM RGB 1 BK accessory.
Key specifications
- Size: 12 inch (300 mm)
- Mounting depth: 140.6 mm (5.54 in); overall depth: 192.8 mm (7.59 in)
- Power handling: 500W RMS, 1000W peak
- Impedance: 2 ohm, single voice coil
- Voice coil diameter: 65.5 mm (2.6 in)
- Magnet: high-density flux ferrite, 156 x 80 x 40 mm
- Weight: 7.6 kg
- Protection: IP65, ASTM-D4329 UV resistance, ASTM-B117 salt fog
- Grille: classic charcoal with integrated RGB LEDs
About the HMS 12 B2-LD-C
The HMS 12 is optimised for open (infinite) baffle applications, delivering deep, punchy bass without requiring a dedicated enclosure. The motor and suspension are engineered for high-power, infinite-baffle operation, with long linear excursion for high output and low distortion. By handling the lowest frequencies, the subwoofer also takes pressure off the main speakers and improves overall system performance.
Features
- Integrated RGB LED lighting, controlled via the HM RGB 1 BK accessory.
- Sound-transparent charcoal grille is easily removable and can be painted to match your vessel.
- Hertz Pure Marine Certified: IP65 protection, ASTM-D4329 UV resistance, and ASTM-B117 salt fog operability.
- 65.5 mm (2.6 in) long-throw voice coil woofer with polypropylene cone (UV inhibitors injected) and co-moulded Santoprene surround, engineered for infinite baffle use.
- Progressive-design aramid fibre spider with silicone-insulated lead wires for durability and consistent performance.
- FEM-optimised high-excursion motor assembly housed in a marine-grade polymer-injected basket.
- Gold-plated corrosion-resistant brass terminals with silicone cap protecting the leadwire junction.
Explore the full range in Subwoofers.
Specification
| Size mm (in.) | 300 (12) |
|---|---|
| Power Handling | - Continuous W 500 |
| Power Handling | - Peak W 1000 |
| Impedance | Ohm 2 |
| Depth mm (in.) | 192.8 (7.59) |
| Mounting depth | mm (in.) 140.6 (5.54) |
| Voice Coil | Type single |
| No Filter Component | 2Ω INFINITE BAFFLE LED SUBWOOFER |
| Voice Coil | Ø 65.5 (2.6) |
| Magnet | size D x d x h mm (in.) 156 x 80 x 40 (6.14 x 3.15 x 1.57) |
| Weight | of one component kg (lb.) 7,6 (16.8) |
| Magnet | High density flux ferrite |
| Cone | Polypropylene with UV inhibitors |
What's Included
- HMS 12 B2-LD-C
Hertz
About the Hertz HMS 12 B2-LD-C
From our tech experts at CEN
Marine-grade 12 inch coaxial speakers handling 500w RMS, built with UV-stable materials and corrosion-resistant hardware for life in sun, salt and spray.
Who it suits
Boats, ribs and open builds, and campers with an outdoor listening area. Anything mounted where rain reaches it should be marine-rated, whatever the vehicle.
Our tech experts advise
In a marine install the wiring decides longevity: tinned cable, sealed joints and a properly fused feed. Mounting position affects the sound more than the speaker choice, because there are no cabin walls to help you. get in touch and we will talk through mounting, wiring and power for your boat.
Explore the full Hertz range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Hertz
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
Hertz Car Audio Range
Hertz produces high-performance car audio systems driven by research.Music fans who attend live concerts know well the emotions that low undistorted frequencies without dynamic compression can arouse.
Looking for Installation?
At CEN we take pride in being able to share the quality of our work as well as being able to show what incredible products we have installed week on week.
Elettromedia Brands
Evolution of technology and art of sound
Frequently Asked Questions
Q: What makes marine speakers different from car speakers?
A: Marine speakers are built with UV-stable, water-resistant cones, grilles and hardware designed for open-air and wet environments. They are the right choice for boats, jet skis, hot tubs and outdoor installs.
Q: Are these speakers fully waterproof?
A: Marine speakers are water-resistant to marine ratings rather than submersible. The IP rating, where provided, is listed in the Specification tab.
Q: Do I need a marine amplifier as well?
A: For best results, yes. Marine amplifiers carry conformal-coated boards that resist moisture and salt air. Match the amplifier to the RMS rating in the Specification tab as you would with any system.
Q: Will these work outside of marine use?
A: Yes. Marine speakers are popular for motorcycles, quads, hot tubs, garden bars and anywhere the weather reaches. Their durability makes them a strong outdoor choice.
Q: Does the HMS 12 B2-LD-C need a subwoofer box?
A: No. The HMS 12 B2-LD-C is designed for infinite baffle (open baffle) mounting, so it can be installed in a boat panel or bulkhead without a dedicated enclosure.
Q: What impedance and power rating is the HMS 12 B2-LD-C?
A: It is a 2 ohm single voice coil subwoofer rated at 500W continuous and 1000W peak power handling.
Q: Is the HMS 12 B2-LD-C sold as a single or a pair?
A: It is sold as a single subwoofer. The box contains one HMS 12 B2-LD-C.
