polk audio - three pairs of db652 6.5" coaxial speakers - marine and powersports certification polk audio polk audio - three pairs of db652 6.5" coaxial speakers - marine and powersports 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 - 5" (12.7 cm) full-range mounting depth - top mount 1.77" (4.5 cm) total frequency response - 40 hz → 22 khz nominal impedance - 4 ohms sensitivity (1 watt @ 1 meter) - 92 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.