Polk Audio's db Series subwoofers give you trademark Polk performance without stressing your wallet. These subs combine high-tech materials with a laser-optimized motor structure for smooth, powerful bass response.
The db840 8" subwoofer boasts a rigid polypropylene cone and durable Santoprene™ surround built to handle big power over the long run. Polk Audio tests their subs rigorously for environmental effects caused by sun, moisture, and extreme temperature changes — they'll withstand whatever mother nature can throw at them. Polk Audio's marine certification means you can confidently take these subs out to sea and dive into some deep bass. Match a db sub to a suitable enclosure, and enjoy impressive low-frequency performance rarely found in this price range.
Polk Audio db840 8" Single 4 Ohms Marine Certified Subwoofer
Impedance: Single 4 ohms
Polypropylene cone woofer
Santoprene rubber surround
Marine certified: capable of withstanding harsh marine environment
Vented coil coupler
Fire-retardant NOMEX spider with linear motion
Designed and aligned with Klippel laser analyzer
Triple vented 4-layer Kapton single 4 ohms voice coil
Frequency response: 30-200 Hz
Sensitivity: 85 dB
top-mount depth: 4"
sealed box volume: 0.35 cu. ft.
ported box volume: 0.6 cu. ft.
- Peak: 360 watts
- RMS: 180 watts