Polk DB402 4" Coaxial Speakers with Marine Certification

The DB402 4" coaxial speakers represent Polk Audio's commitment to delivering exceptional sound quality in a compact, marine-certified package. These speakers feature Dynamic Balance technology and IP56 marine certification, making them perfect for cars, boats, motorcycles, and ATVs. With 135W peak power handling and a frequency response of 60Hz-22kHz, the DB402 speakers deliver crystal-clear highs, rich midrange, and surprisingly robust bass for their 4-inch size.

Superior Marine Protection Technology

Marine certification isn't just a label – it's peace of mind. The DB402 speakers undergo rigorous testing for salt-fog, UV exposure, and humidity resistance. The polypropylene UV-tolerant cone maintains its pristine appearance and performance even after years of exposure to harsh elements. Waterproof inner and outer surrounds completely seal the speaker housing, preventing dirt, moisture, and debris from compromising sound quality or longevity.

Dynamic Balance Engineering Excellence

Polk's patented Dynamic Balance technology uses laser imaging to identify and eliminate unwanted resonant frequencies during the design phase. This process ensures distortion-free sound reproduction with wide dispersion characteristics. The lightweight polypropylene cone delivers spectacular midrange clarity while the 0.75" silk dome tweeter provides smooth, detailed high-frequency response without harshness.

Universal Installation Versatility

The shallow tweeter design ensures factory grilles reinstall perfectly, maintaining your vehicle's original appearance. With universal 4-hole and 2-hole mounting compatibility, these speakers drop into virtually any 4" speaker location. The included mounting hardware, grilles, and wiring make installation straightforward for both DIY enthusiasts and professional installers.