NEW POLK AUDIO DB840 8" 360 Watt 4-Ohm SVC Car Marine Boat Subwoofer Power Sub

It's all here. All the Polk goodness and technology that makes our subwoofers a kickin' addition to any vehicle's audio system, as only Polk can deliver. **db840 Features:** "Dished" polypropylene cone supported by a vented cone/coil coupler stiffens the cone for greater mechanical stability and lower distortion. Marine Certified Polk db Series speakers are built tough to withstand the toughest environments so they are perfect for use in boats of all types. That's why Correct Craft offers Polk speakers in their award winning Nautiques ski and wakeboarding boats. Santoprene surround is impervious to extremes in temperature, humidity and exposure to sunlight for excellent long term reliability. Fire retardant flat NOMEX? spider allows extended linear motion while providing highly reliable mechanical and thermal stability. Triple venting of the 4 layer Kapton voice coil former, cone/coil coupler and pole piece contribute to the high power handling and reliability of the db Series subs. As with all Polk subwoofers, the voice coil alignment, motor and suspension were optimized using a state of the art Klippel laser analyzer. The result is superior cone travel linearity for flatter response and lower distortion. Dual voice coil version also available db840DVC Optional db8G grille is available. 1 Buy = 1 Subwoofer **We are an authorized Polk Dealer!**

NEW **Polk Audio DB840** 8" 360 Watt Car Subwoofer 360 Watt MAX 180 Watt RMS Type: Dynamic Balance Woofer with Polymer Composite Cone Single 4 Ohm Voice Coil Efficiency: 85 dB Nominal Impedance: 4 ohms Total Frequency Response: 30 200 Hz Driver Diameter: 8" (20.32cm) Cut Out Diameter: 7 1/8" (18.10cm) Bottom Mount: 4 1/2" (11.43cm) Top Mount: 4 1/16" (10.32cm) Diameter: 10" (25.40cm) Recommended Enclosure: Sealed/Ported/Bandpass Resonant Frequency: 49 Hz SD: 54.25 sq in/350 sq cm VAS: .42 cubic feet/11.9 L Xmax Linear: .51 inch/13 mm (peak to peak) Product Condition: Brand New Item Weight: 7 lbs. Part Number: **DB8040** Warranty ? 1 Year Manufacturer Warranty