Polk Audio db840 8-Inch Single Voice Coil Subwoofer (Single, Black)
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- 8-inch single-coil subwoofer loudspeaker (single)|Power handling: 180 watts continuous, 360 watts peak|Frequency response: 30-200 Hz|Marine certified for use in boats of all types|
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Power Handling: Peak: 360 watts RMS: 180 watts 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.
From the Manufacturer
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 Series
Polk 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 Performance
The 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.
The 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 Box
Polk Audio db840 8-Inch Single Voice Coil Subwoofer, mounting screws, manual, warranty registration
Top customer reviews
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Not that anyone else has a Mitsubishi Montero, but if you do. and you have the Infinity Sound system, this sub will work as a replacement sub. It's only 4 inches deep which is short enough to fit in the hole and it is wide enough where all you need to do is drill new holes in the metal to get it fastened in.
The sound provided by this amp is superb, I don't really crank up my sound system so I can't tell you what it does at ear splitting decibels, all I can say is that with the system cranked up enough to hear it fully going down the road at 55 mph with the windows open, this sub packs a distinct punch. I'm sure you could get a lot more out of it if you saddled it with a higher power amp, not what I was looking for though.
The sound quality from this sub is something you won't find in the cheaper offerings out there, it's a very clean. No rattle bass, what you'd expect from an 8 inch sub. It's really too bad that I've got a grate over my sub because this baby actually looks pretty cool. It's just classy.
Hope it helps!
I won't be installing the amp until the car goes into hibernation soon as I'm pulling the entire interior and doing it all over.