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Polk 8-Inch Single Voice Coil 4-Ohm Subwoofer, Refurbished

$44.95
Was $111.93 You save $66.98!
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SKU: DB840-RB
Brand: Polk Audio
Condition: Refurbished
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This refurbished Polk 8-Inch Single Voice Coil 4-Ohm Subwoofer is a kickin' addition to your audio or marine system and delivers incredible sound for a great price.

It's a Marine certified subwoofer with a dished polypropylene cone that's supported by a vented cone and coil coupler that stiffens it for greater mechanical stability and lower distortion. This subwoofer is optimized for high performance in virtually any enclosure including sealed, vented, and band pass. The state-of-the-art laser-based Klippel measurement technology centers the subwoofer's voice coil in the magnetic field to improve its micro and macro dynamics for thumpin' bass.

It has a sleek, black matte finish that delivers rich, deep bass and a santoprene surround that is impervious to extremes in temperature, humidity, and exposure to sunlight. It gives you consistent, reliable performance wherever you choose to install it.

Built for the toughest environments, this refurbished Polk 8-Inch Single Voice Coil Subwoofer has bass that will put a pep in your step.

Certified Refurbished Items

This is a used item that has been professionally restored to working order by a manufacturer or manufacturer-approved vendor. This means the product will show signs of use, such as scratches and scuffs, but has been inspected and repaired to meet manufacturer specifications and is in the original working condition. This item may or may not be in the original packaging.
  • This refurbished Polk 8-Inch Single Voice Coil Subwoofer produces an amazing sound at an amazing price
  • 8-inch single voice coil refurbished subwoofer
  • Specifications:
    • RMS Power Handling: 180 watts
    • Peak Power Handling: 360 watts
    • Electrical Efficiency: 85 dB
    • Nominal Impedance: 4 Ohms
    • Total Frequency Response: 30-200 Hz
    • Electric Voice Coil Driver Diameter: 1.5 inches
    • Thiele/Small Parameters - BL: 10.3 Tesla meters
    • Thiele/Small Parameters - CMS: 157.6 micro meters
    • Thiele/Small Parameters - MMS: 67 g
    • Thiele/Small Parameters - QES: 0.6
    • Thiele/Small Parameters - QMS: 14.1
    • Thiele/Small Parameters - QTS: 0.6
    • Recommended Enclosure: Sealed, ported, bandpass
    • Resonant Frequency: 49 Hz
    • Thiele/Small Parameters - SD: 35.6 square inches
    • Thiele/Small Parameters - VAS: 0.42 cubic feet
    • Thiele/Small Parameters - Xmax - Xmax Linear: 0.51 inches/13 millimeters peak to peak
    • 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
    • Voice coil alignment, motor, and suspension were optimized using a state-of-the-art Klippel laser analyzer
    • Marine certified
  • Dimensions: 7.13 x 4.5 x 4.06 inches
  • Weight:6.5 pounds
  • Product Warranty: 90-day warranty
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