About: Hertz HMS 12 S4-LD-G 12" 500W RMS Marine Subwoofer - 4 Ohm (Gray) 

The new HMS 12 marine sport grille subwoofer is optimized to perform in open baffle applications for deep and punchy bass without the need to build a dedicated enclosure. HMS 12 is available at 2 or 4-ohm single voice coil versions, featuring a stunning 500 W continuous power handling. The sport grille, featuring built-in LEDs, can be easily and painted the perfect color for your vessel.  The motor and suspension design is optimized for high-power, infinite-baffle operation featuring long linear excursion capability for tremendous output with low distortion.  Hertz Marine subwoofers not only add tons of bass output to your system but also relieve the main speakers from the hard work of reproducing the lowest frequency range, thus maximizing overall system performance for unlimited sound pressure and emotion!

Features:

• Integrated RGB LED lighting to enhance your experience in combination with the HM RGB 1 BK accessory
• Sound-transparent sport grille easily removable to be painted with a custom color perfect for your boat
• Hertz Pure Marine Certified Product stamp featuring the IP65 protection grade, ASTM-D4329 standards for UV resistance and ASTM-B117 for salt fog operability
• Long-throw 50mm (2”) voice coil woofer engineered for infinite baffle application featuring polypropylene cone injected with UV inhibitors and co-molded Santoprene surround
• Progressive-design aramid fiber spider with silicone-insulated lead wires ensuring durability and constant performance over time
• FEM optimized high-excursion mobile equipment driven by a massive magnetic group encapsulated into a marine-grade polymer injected basket
• 7Gold-plated corrosion resistant brass connection terminals with silicone cap protecting leadwire junction point

Specifications:

• Size mm (in.): 300 (12)
• Power Handling - Continuous W: 500
• Power Handling - Peak W: 1000
• Impedance Ohm: 4
• Depth mm (in.): 191 (7.52)
• Voice Coil Type: single
• No Filter Component: 4Ω SPORT 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

Electro-acoustic Specs:

• D mm: 300
• Xmax mm: 19
• Re Ohm: 3.3
• Fs Hz: 30
• Le mH: 0.62
• Vas I: 104.7
• Mms g: 112
• Cms mm/N: 0.247
• BL T*m: 8
• Qts: 1
• Qes: 1.1
• Qms: 12.9
• Spl dB: 89.5