Boss Audio MR690 White 6" x 9" Oval Marine SpeakersBoss Marine Loudspeakers are designed to withstand the harsh conditions ofthe marine environment. All frame and grill sections are made of a polymercomposite that is completely waterproof with a coating to protect againstdamage from UV rays. We use rubber surrounds and polypropylene cones tocomplete the waterproof package. The tinsel leads are coated to preventcorrosion. In addition to the material engineering qualities and we are proud to say these speakers sound awesome.MR690 (White) 6" x 9" 2-way Marine Speaker Features: Power Handling, Peak: 350 watts Magnet Structure: 50 Oz Impedance: 4 OHM Frequency Response: 60HZ-20KHZ Spl 1 watt/1 meter: 92dB Cone Material: Poly Injection Voice Coil: 1" Aluminum Tweeter: 1" Mylar Dome Grilles: PlasticQTY NONE