Hertz HMS 12 B4-LD-C: Unleash Powerful Bass on the Water

Introducing the HMS 12 B4-LD-C, a 12-inch marine subwoofer engineered to deliver exceptional bass performance in open-air environments. Featuring a classic charcoal grille design and advanced technology, this subwoofer is the perfect addition to any boat audio system.

Key Features and Benefits

Optimized for Open Baffle Applications: Designed to thrive without the need for a dedicated enclosure, the HMS 12 delivers deep, punchy bass in free-air setups.

High Power Handling: With a 500W continuous power handling (1000W peak), this subwoofer can handle serious power, ensuring a robust and dynamic audio experience.

Available in 2- or 4-Ohm Configurations: Choose the impedance that best suits your system's needs, providing flexibility in system design.

Classic Grille with Integrated RGB LED Lighting: The timeless charcoal grille not only looks great but also features built-in RGB LED lighting. Customize the lighting to match your boat's aesthetic using the optional HM RGB 1 BK accessory.

Long Linear Excursion: The motor and suspension design allows for extended cone movement, resulting in tremendous output with minimal distortion. Enjoy clear and powerful bass, even at high volumes.

Hertz Pure Marine Certified: Built to withstand the harsh marine environment, the HMS 12 boasts an IP65 protection grade, along with ASTM-D4329 certification for UV resistance and ASTM-B117 for salt fog operability. This ensures long-lasting performance and reliability.

Advanced Engineering for Superior Sound

Long-Throw Voice Coil: The 50mm (2”) voice coil is engineered for infinite baffle applications, featuring a polypropylene cone injected with UV inhibitors and a co-molded Santoprene surround for enhanced durability.

Progressive-Design Aramid Fiber Spider: The spider design, along with silicone-insulated lead wires, ensures consistent performance and long-term reliability.

FEM Optimized Mobile Equipment: The high-excursion mobile equipment is driven by a massive magnetic group, all encapsulated in a marine-grade polymer-injected basket.

Corrosion-Resistant Terminals: Gold-plated brass connection terminals with silicone caps protect the lead wire junction point, ensuring a secure and corrosion-free connection.

Technical Specifications

• Size: 300 mm (12 in.)
• Power Handling (Continuous): 500 W
• Power Handling (Peak): 1000 W
• Impedance: 4 Ohm
• Depth: 191 mm (7.52 in.)
• Voice Coil Diameter: 65.5 mm (2.6 in.)
• Magnet Size: 156 x 80 x 40 mm (6.14 x 3.15 x 1.57 in.)
• Weight: 7.6 kg (16.8 lb.)

Electro-Acoustic Specifications

• D: 300 mm
• Xmax: 19 mm
• Re: 1.8 Ohm
• Fs: 30 Hz
• Le: 0.41 mH
• Vas: 95.4 l
• Mms: 114 g
• cms: 0.225 mm/N
• BL: 8 T*m
• Qts: 1
• Qes: 1.1
• Qms: 11.1
• Spl: 89.5 dB

Physical Specifications

• A (Overall Diameter): 342.9 mm (13.5 in.)
• B (Mounting Diameter): 279.4 mm (11 in.)
• C (Overall Depth): 192.8 mm (7.59 in.)
• D (Baffle Cutout): 140.6 mm (5.54 in.)
• F (Flange Thickness): 52.2 mm (2.06 in.)

Upgrade your marine audio system with the Hertz HMS 12 B4-LD-C and experience the power and emotion of high-quality bass on the water!