Hear them loud and clear, the KM Coaxial Marine Speakers are built to pump out the tunes – and the fun - for years to come! Whether you mount your speakers in the hull, or KICKER tower enclosures, you also get a pair of stout marine-grade grilles! ur speakers are made to thrive in the water. UV treatments on injection-molded cones, Santoprene surrounds, baskets and grilles all help maintain top-shelf performance. KM speakers will endure almost any weather conditions with splash-and-spray-resistant sealed motors and locking/sealed terminal covers. Speaker hardware is forged from rustproof, 316L stainless-steel. Four-Ohm Voice Coil 1/2-Inch PEI Tweeter Locking/Sealed Terminal Covers UV-Treated Polypropylene Woofer With Santoprene Surround UV-Resistant Polymer Basket 316L Stainless Mounting Hardware Included Charcoal and White Grilles Included Meets or Exceeds ASTM Standards for UV and Salt/Fog Exposure Specifications Woofer(in,mm) 4, 100 Tweeter(in,mm) 1/2, 13 Tweeter Dome Material PEI Rated Impedance(Ω) 4 Peak Power Handling(Watts) 150 Continuous Power Handling(Watts RMS) 50 Sensitivity(1W,1m) 89 Frequency Response(Hz) 60-20k Mounting Hole Diameter(in,mm) 3-13/16, 97 Mounting Depth(in,mm) 1-7/8, 48 LED Lighting No Grilles Charcoal and White Whats in the Box: 2 - 4" 2Ω Coaxials 8 - Mounting Screws 8 - Mounting Screw Clips 2 - Wire Connection Cover 2 Zip Ties