Coaxial Speakers With Marine Certification

Polk DB402 4 Coaxial Speakers with Marine CertificationPerfect for anything: Cars， Trucks， Boats ATVs & More. Everything you love about Polk’s Dynamic Balance technology—that rich， clean， full-range sound—is built into the marine-tough， yet ruggedly sophisticated， DB+ series. And with its universal fit， it can be installed in any vehicle: Automobiles， motorcycles， boats， ATVs—you name it.Specifications: • Driver Enclosure Type - Marine Certified• Cut Out Shape - Circle• Cut Out Diameter - 4.09 (10.39 cm)• Full-Range Mounting Depth - Top Mount 1.79 (4.55 cm)• Total Frequency Response - 60 Hz → 22 kHz• Nominal Impedance - 4 ohms• Sensitivity (1 watt @ 1 meter) - 90 dB• Continuous Power Handling (RMS) - 45W• Peak Power Handling - 135WHigh Performance Upgrade - Upgrade from your OEM speaker system toward a bigger， fuller， high-performance sound.Marine Certification - The DB+ Series is IP55 rated so it’s dirt- & water- resistant. It also has been tested for salt-fog， UV and humidity.Polypropylene UV Tolerant Cone - Enjoy the peace of mind knowing each speaker cone is built to last， whose clean and polished look won’t discolor or degrade over time.Waterproof Inner and Outer Surrounds - Completely blocks dirt， liquid and grime from entering the speaker housing.Universal Fit - Enjoy a simple drop in installation for any vehicle including cars， boats， ATV’s -- you name it. This quick and easy experience also ensures a faster installation process so you can get back to what matters with our great sound always along for the ride.Zero Tweeter Protrusion - Each speaker in the DB+ Series features a shallow tweeter design to ensure your factory speaker grille re-installs with ease for a flush， seamless look.