Waterproof and designed for marine useMax power handling: 130 WattsSensitivity: 91dBFrequency: 65Hz20kHzNominal impedance: 4 OhmsPolypropylene woofer: 6-1/2 "Magnet: 11ozMounting hole diameter. 5"x depth: 2-1/3"Titamium Dome TweeterASTM B117 Salt spray exposure standard compliantASTM D4329 UV Exposure standard compliant