Boss Audio 5.25" Round 2-Way Marine SpeakersBoss Audio MR50B 5.25" Round Marine Speakers. Boss Marine Loudspeakers are designed to withstand the harsh conditions of the marine environment. All frame and grill sections are made of a polymer composite that is completely waterproof with a coating to protect against damage from UV rays. We use rubber surrounds and polypropylene cones to complete the waterproof package. The tinsel leads are coated to prevent corrosion. In addition to the material engineering qualities and we are proud to say these speakers sound awesome. Available in black or white.MR50B 5.25" 2-Way Speaker Features: Power Handling, Peak: 150W; Magnet Structure: 30 Oz; Impedance: 4 OHM; Frequency Response: 120HZ-18KHZ; Spl 1 watt/1 meter: 90dB; Cone Material: Poly Injection; Voice Coil: 3/4" Aluminum; Tweeter: 1" Mylar Dome; Grilles: Plastic; - cis2:mm5mnJlm -Specifications: Watts Max: 150 Watts; Mounting Style: Flush; Size: 5.25; QTY: Pair; Watts RMS: 75 Watts; Weatherproof: Yes; Box Dimensions: 7"H x 7"W x 8"L WT: 3.4 lbs; UPC: 791489250108;