Boss Audio MR690 White 6 x 9 Oval Marine SpeakersBoss 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.Features:Power Handling, Peak: 350 wattsMagnet Structure: 50 OzImpedance: 4 OHMFrequency Response: 60HZ-20KHZSpl 1 watt/1 meter: 92dBCone Material: Poly InjectionVoice Coil: 1 AluminumTweeter: 1 Mylar DomeGrilles: PlasticWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.