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MM 572 5"x7" car speakers only improve on that well-earned reputation. You can count on low distortion and maximum performance from this flagship Polk line, the result of years of research and development. These rugged car speakers are ultra-marine certified, able to shrug off harsh environmental abuse to deliver exceptional sound for nearly any application, from cars to boats. General Features:5"x7" 2-way speakersTitanium coated polymer woofer cone with Santoprene rubber surround1" Terylene fabric tweeterCertified for marine use (IP56 rating)Non-corrosive fiberglass reinforced ABS basketEpoxy coated crossoversWaterproof surroundsWeep holes for proper drainageHandles up to 100 watts RMS (300 watts peak power)Frequency response: 35-40,000 HzSensitivity: 93 dBTop-mount depth: 2-5/8"Grilles not included