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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.
All Polk loudspeakers rely on our patented process to eliminate electro-acoustic and mechanical issues before they become a part of the finished speaker and are also rigorously tested through Polk’s Klippel distortion analyzers. DB+ Series, in addition to their IP56 waterproof rating and Marine Certification feature waterproof surrounds that completely block dirt, liquid, and grime from entering the speaker housing—all designed to maximize longevity of the speaker.
50 years, hundreds of thousands of speakers, and countless awards later, we are still focused on our mission of giving you the absolute best sound for your money. Great Sound for All.
|Drivers Warranty||1 years|
|Driver Enclosure Type||Marine Certified|
|Driver Complement||• (1) 4" (10.16 cm) d (Round) - Mid/Woofer
• (1) 0.75" (1.91 cm) d (Round) - Tweeter
|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|
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