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Polk DB522 5.25" Coaxial Speakers with Marine Certification Perfect 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 - Round • Cut Out Diameter - 4.76" (12.09 cm) • Full-Range Mounting Depth - Top Mount 1.74" (4.42 cm) • Total Frequency Response - 55 Hz → 22 kHz • Nominal Impedance - 4 ohms • Sensitivity (1 watt @ 1 meter) - 91 dB • Continuous Power Handling (RMS) - 100W • Peak Power Handling - 300W High 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.
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The specs above are the fastest way to confirm a part is right before checkout — a size or power rating just outside your factory setup usually means an adapter or a different SKU, not a return later. If you are not sure which spec matters for your vehicle, the fit tool at the top of the page narrows the catalog to parts already confirmed for your year, make, and model.
