Polk Audio DB+ Series 4″ 135W Coaxial Speakers with Marine Certification: Polk DB+ Series Speakers Offer Premium Quality Without the Price Tag
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.
Polk Audio DB402 Features:
- High performance audio upgrade that delivers signature quality sound that goes beyond OEM factory systems
- Marine certified with IP55 rating (water- and dirt-resistant) and tested for salt-fog, UV and humidity
- Polypropylene and UV tolerant cone with waterproof inner and outer surrounds
- Simple drop-in installation for any vehicle including cars, boats, ATVs—you name it
High Performance Upgrade
Upgrade from your OEM speaker system toward a bigger, fuller, high-performance sound. The high-grade materials used in our DB+ Series ensure you get an audio system that’s designed and engineered to last much longer than your factory setup.
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. 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 it’s fully protected against the elements.
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 while giving that important low end sound the high-performance it deserves.
Waterproof Inner and Outer Surrounds
Completely blocks dirt, liquid and grime from entering the speaker housing, which helps minimize corrosion and maximize longevity of the entire speaker and its housing basket.
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.
Legendary Product & Support from Authorized Dealers
You’ve decided to buy Polk Audio. That means quality and performance are important to you, so who you buy your new Polk Audio gear from is just as important. Here are a few reasons to purchase from an authorized dealer and here is why. 
Proper Training: Only authorized Polk Audio dealers are factory trained to sell and install our products. They know our products and your vehicle to ensure that your new purchase exceeds your expectations!
Authorized Warranty: Polk Audio provides one of the best warranties in the business. Only customers purchasing through authorized dealers receive this comprehensive company warranty. Don’t be fooled by others who promise a full warranty, because it’s simply not true.
Support: If you have an issue, you are covered by Polk Audio Australia’s manufacturer’s warranty and all you need to do is send it back in direct to get any warranty issues sorted, not post it back overseas. It’s all done right here.
Protect Your Investment: Protect yourself and your investment by making sure you buy your Polk Audio product from us, an online dealer who is part of the Polk Audio family. Ask yourself, is it worth saving a few dollars to not be covered?!
