Pair. Waterproof. Max power handling: 130 watts (pair). Sensitivity: 91dB. Frequency: 65Hz-20kHz. Nominal impedance: 4 Ohms. Polypropylene woofer: 6-1/2". Magnet: 11oz. Mounting hole diameter: 5". Mounting depth: 2-1/3". Tweeter type: dome. Tweeter material: Titanium. ASTM B117 salt spray exposure compliant. ASTM D4329 UV exposure standard compliant.