Polk Audio db840 8-Inch Single Voice Coil Subwoofer (Single, Black)
The Polk Audio db840 8-inch single voice coil subwoofer speaker is an easy way to get great sound without breaking the bank. Great for sealed, ported, or band pass enclosures, the db840 offers high-power handling with low distortion; tight, stomach-shaking bass; and the long-term reliability for which Polk is known.Incredible sound at an affordable price.Click to enlarge.Polypropylene cone and Santoprene surround for stability, low distortion, and long-term reliability.Click to enlarge.Optimized voice coil alignment, motor, and suspension for flatter response and low distortion.Click to enlarge.Polk Audio's Redesigned and Re-Engineered db SeriesPolk Audio's entire db line of coaxial and component speakers has been redesigned and re-engineered with superior looks and even better sound, adding three new sizes to cover a broader range of vehicle applications--at prices that make high performance affordable to everyone. The db Series works well in OEM factory systems as well as with high-powered aftermarket head units and component power amps. Enjoy classic Polk Audio performance and durability like never before.Engineered for PerformanceThe db840's polypropylene cone is supported by a vented cone/coil coupler, which stiffens the cone for more stability and lower distortion. The Santoprene surround is impervious to extremes in temperature, humidity, and exposure to sunlight, which means more reliability regardless of the application.A fire-retardant flat NOMEX Spider allows extended linear motion while providing highly reliable mechanical and thermal stability. And triple venting of the 4-layer Kapton Voice Coil Former, Cone/Coil Coupler, and Pole Piece contribute to the high-power handling and overall reliability of the db Series subs.Finally, as with all Polk Audio subwoofers, the db840's voice coil alignment, motor, and suspension are optimized using a state-of-the-art Klippel laser analyzer. The result is superior cone travel linearity for flatter response and lower distortion.Marine CertifiedThe db840 is Marine Certified, meaning that it's built to withstand the toughest environments--perfect for use in boats of all types. That's why Correct Craft offers Polk Audio speakers in the company's award-winning Nautiques ski and wakeboarding boats.What's in the BoxPolk Audio db840 8-Inch Single Voice Coil Subwoofer, mounting screws, manual, warranty registration