Polk Audio DB402 DB+ Series 4" Coaxial Speakers with Marine Certification, Black

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  • $ 79

Free standard shipping on all orders within the continental US.

Upgrade your Car, Boat, Motorcycle, or ATV’s factory speaker set with the DB+ Series to get that legendary Polk sound wherever life takes you. You’ll get loud, crystal clear sound with effortless bass from a marine certified speaker that’s easy to install and built to last.

Hundreds of thousands of car audio enthusiasts love Polk’s DB+ Series for the rich, clean, full-range sound they provide automobiles, motorcycles, boats, and ATVs. Built marine tough and designed for a universal fit, DB+ series power the soundtrack of your ride wherever life takes you, on the road, the trail, the waves—you name it.

The DB+ Series is IP56 rated so they are dirt- and water-resistant. They also have been tested for salt-fog, UV and humidity. A big part of that marine certification also means that each speaker has a non-corrosive plastic grille, a polypropylene UV tolerant cone, waterproof inner and outer surrounds, and stainless steel mounting hardware, ensuring that they are fully protected against the elements.


  • High Performance Factory Audio Upgrade for Car, Boat, Motorcycle, ATV
  • Marine Certified (IP56 rated): Dirt / Water Resistant, Tested for Salt-Fog, UV, Humidity
  • Universal “Drop-in” Fit with Zero Tweeter Protrusion
  • 1-Year Limited Warrant


  • Driver Complement: (1) 4" (10.16 cm) d (Round) - Mid/Woofer, (1) 0.75" (1.91 cm) d (Round) - Tweeter
  • Shape: Round
  • Diameter: 4.09" (10.39 cm)
  • Full-Range Mounting Depth - Top Mount: 1.79" (4.55 cm)
  • Full-Range Mounting Depth - Bottom Mount: 2" (5.08 cm)
  • Continuous Power Handling: 45W
  • Peak Power Handling: 135W
  • Total Frequency Response: 60 Hz → 22,000 Hz
  • Nominal Impedance: 4 ohms
  • Sensitivity (1 watt @ 1 meter): 90 dB

WARNING: California Residents - Proposition 65. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov



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