Pyle's Hydra series speakers are waterproof and designed for use in your boat, on the dock, by the pool, or simply mounted outside. They're designed with rust-proof mesh covers for quality protection. The PLMR52 is a 150-watt, 5.25' two-way, full-range speaker suitable for marine use. This speaker is equipped with a 1' high temperature voice coil for smooth mids and lows and a ' neodymium dome tweeter for the sweetest highs. The molded ABS plastic basket keeps your sound distortion-free. Features: Includes (2) 5.25'' Component Speakers Marine Grade Weather Resistant Construction Full Range Stereo Sound Reproduction 2-Way Dual Cone Speakers Poly Carbon Cone, Cloth Surround Molded ABS Machined Basket and Grill For Marine, Automobile Off-Road Vehicles Universal Standard OEM Replacement Size Includes Speaker Wire Mounting Hardware Technical Specs: MAX Power: 150 Watt RMS Power: 75 Watt 4 Ohm Impedance Sensitivity: 88dB 15 oz. Circuit Magnet Voice Coil: 1.0'', Aluminum Tweeters: 0.5'', Polymer Dome Frequency Response: 100Hz-20kHz Speaker Total Diameter: 5.79'' Speaker Cut-Out Diameter: 4.49'' Speaker Mounting Depth: 2.12''