BOSS Audio Systems MR752C, 2 Way Marine Component Speaker is Weather Proof Full Range 7.5" 2-Way Speaker Pair with 400 Watts MAX 200 Watts RMS Power Handling per Pair, 40 Hz to 20 kHz Frequency Response and 90dB Sensitivity, Polypropylene Woofer Cone and Rubber Surround. Made from polyurethane, the MR652C 6.5-inch car speakers provide a resilient and durable material that can offer great sound with the advantage of long-lasting speakers