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Polk Audio db804

Single 4 ohms 8" db Series Subwoofer (Marine Certified)

  • 5.0

(1 review)

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The product on this page is discontinued, but there is a newer model available:
Newer Model: Polk Audio db840
Polk Audio db840 thumbnail
$59.95 Backorder

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Fast shipping, products as described, and best prices i've found anywhere! Lots of confirmation emails and tracking info. This was the second time I ordered from Sonic Electronix and have had same great service on both orders. Keep up the great work.

- RoyNMississippi from Mississippi

See more…
  • 8" Single 4 Ohms db Series Subwoofer
  • Power Handling:
    • Peak: 360 watts
    • RMS: 180 watts
  • Impedance: Single 4 ohms
  • Polypropylene cone woofer
  • Santoprene rubber surround
  • Suitable for marine use
  • Triple-vented Kapton voice coil former
  • Fire-retardant flat NOMEX spider
  • Voice coil size and type (if listed)
  • Magnet size and type (for example: "40oz. neodynium magnet structure")
  • Frequency response: 30-200 Hz
  • Sensitivity: 85 dB
  • 1-year SonicElectronix.com warranty

Product History:

Polk Audio db840 thumbnail
(newest, current model)
Polk Audio db804 thumbnail
(previous model, replaced by Polk Audio db840)
Subwoofer Specifications
Subwoofer Size 8"
Peak Power Handling 360 watts
RMS Power Handling 180 watts
Voice Coil(s) Single
Impedance (Per Voice Coil) 4 ohms
Frequency Response 30 - 200 Hz
Sensitivity 85 dB
Woofer Composition Polypropylene
Woofer Surround Santoprene Rubber
Recommended Enclosure Specifications
Minimum Sealed Box Volume 0.66 cubic feet
Maximum Sealed Box Volume 0.66 cubic feet
Minimum Ported Box Volume 1.25 cubic feet
Maximum Ported Box Volume 1.25 cubic feet
Top-Mount Depth 4"
Cutout Diameter 7-1/16"
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 1 year
Labor Warranty Duration 1 year
Warranty Provider Sonic Electronix
Customer Review Summary for Polk Audio db804
Average Customer Rating is 5.0 out of 5 stars:
  • 5.0
based on 1 Review
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Rating Distribution:
5 star:
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 100%
4 star:
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3 star:
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what's this?
Average Attributes Rating:
Durability
  • 5.0
 5.0
Value
  • 5.0
 5.0
Features
  • 5.0
 5.0
Design
  • 5.0
 5.0
Usability
  • 5.0
 5.0
what's this?
Most Helpful Customer Reviews:
July 12, 2007 A KICK BASS SUB
Review by
Steven from Prescott Valley, AZ
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
this sub hits incredibly hard for a 8in, i have friends with much larger subs, and this one keeps up, even on my 80W amp! this sub is rated much higher and i'm sure it can keep up with all its bigger brethren. Excellent sub over all, great price. you won't be disappointed!
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Speaker Wire
Choose from our recommended speaker wire to hook up your amplifier to your new subwoofer. The higher quality of speaker wire that it used for this connection, the better your subwoofer will sound.
  Product Price Add?
15 ft. of 12 AWG StreetWires Speaker Wire 15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer. 		$24.99
20 ft. of 12 AWG Kicker Speaker Wire 20 ft. of 12 AWG Kicker Speaker Wire
Kicker uses twisted pair technology and hyper-flex cable to provide you with the cleanest sound and a simple installation. 		$39.95
Sound Dampening Material
Get the most sound out of your new subwoofer with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
  Product Price Add?
Dynamat Rubber Roller Dynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat! 		$18.99
Dynamat Xtreme Trunk Kit Dynamat Xtreme Trunk Kit
Get better sounding bass from your new subwoofer with enough Dynamat Extreme for your entire trunk. 		$93.99
Enclosure Accessories
These accessories are designed to help you build the custom enclosure that you have always wanted, or add to the box that you already bought. Either way, these products can assist you in achieving better sound, better looks, and more bass!
  Product Price Add?
20 oz. Bag of Poly-Fil 20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system. 		$5.99
16 oz. Can of Adhesive Spray 16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles. 		$5.99
Binding Post Terminal Cup Binding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure. 		$4.99
Banana Clip Terminals Banana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection. 		$4.99
Installation, Tools & Accessories
Don't forget to get the tools and accessories that will help you install your new subwoofer in your vehicle. Whether you opt for the professional installation card or the do-it-yourself method, you will need the following to help you out!
  Product Price Add?
Car Stereo and Speaker / Subwoofer Installation Tool Kit Car Stereo and Speaker / Subwoofer Installation Tool Kit
Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more. 		$14.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
  Product Price Add?
Scosche SPL Meter Scosche SPL Meter
Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB. 		$24.99
AutoSound 2000 CD-101 AutoSound 2000 CD-101
Low frequency test CD 		$12.99
AutoSound 2000 CD-102 AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement. 		$12.99
AutoSound 2000 CD-103 AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components. 		$12.99

For more information on wiring subwoofers, visit our Subwoofer Wiring Guide: Subwoofer Wiring Guide

Product Summary

Manufacturer: Polk Audio
Model number: db804
Weight: 9.00 lbs
Internal SKU: db804
Internal product ID: 7103