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Everything you love about Polkâs Dynamic Balance technologyâthat rich, clean, full-range soundâis built into the marine-tough, yet ruggedly sophisticated, DB+ series. And with its universal fit, it can be installed in any vehicle: Automobiles, motorcycles, boats, ATVsâyou name it. Features: (2) Polk Audio DB402 4′ 270 Watt Car Audio Marine/ATV/Motorcycle/Boat Speakers High performance audio upgrade that delivers signature quality sound that goes beyond OEM factory systems Marine certified with IP65 rating (water- and dirt-resistant) and tested for salt-fog, UV and humidity Polypropylene and UV tolerant cone with waterproof inner and outer surrounds Simple drop-in installation for any vehicle including cars, boats, ATVsâyou name it Zero tweeter protrusion and reduced mounting depth for a precise fit Dynamic Balance technology offers a rich, clean, full-range sound Â¾â, 20mm Tweeter ensures clear, balanced mids and highs 45 Watts at Continuous Power; 135 Watts at Peak Power Rockville Rockmat RM2 Sound Dampening Speaker Deadening Kit (2) 12′ x 12′ Sheets Easiest installation! Tested to work better than leading brands of sound dampening Paintable Surface Available in both black and silver Dimensions per sheet: 12′ inch Length x 12′ inch Width x 0.07′ sheet Depth Raw Material: 90% high absorbent butyl rubber and 10% pure-grade aluminum Reduces unwanted noises 5-8 dB Adhesive temperature range of -100F to 300F (-60C to 150C). High-Tack Self-adhesive Material Color: (Silver) Weight: 1.32 Lbs. Unit Dimensions: 12.4â x 12.4â x 0.47â inch