Frequently Asked Questions

What does Marine Certified mean?

After we made our db, DXi and MM Series products perform superbly in a car, we took them where few speaker components and parts dare go: on the water. Our engineers and designers wanted to put our product to the test, so they subjected everything to ASTM (American Society for Testing and Materials) scrutiny to ensure db, DXi and MM Series product performed as well on the water as they do on the boulevard.

These speakers were put under two grueling tests—B117-03 Standard Practice for Operating Salt Spray (Fog) Apparatus, and D4329-99 Standard Practice for Fluorescent UV Exposure of Plastics to see if they could stand up to a harsh marine environment.

Under the procedures for the Salt Fog test, components were exposed to a temperature of 95 degrees Fahrenheit and a 5% salt solution for 500 hours. Under the Ultra Violet test, components were placed in an accelerated weathering machine and subjected to a series of conditions for a test period of 500 hours. Those conditions included 8 hours of UV-B light, black body temperature of 60 degrees Celsius and 4 hours condensate water, black body temperature of 40 degrees Celsius. This cycle was repeated continuously during the test period.

Sea Ray and Correct Craft boats, two leaders in their respective categories, spec Polk products, testament to the quality of all three of these amazing series.

So which marine certified Polk speakers are right for you? Well, the fact is that all of our db, DXi and MM series pass marine certification tests.  Work with the professionals at Polk Audio to determine which of these meet your requirements.

This FAQ was last modified on April 19, 2014

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