Search  for anything...
Polk Audio

Polk Audio DB842 DVC - DB+ Series 8 Inch Shallow Mount Subwoofer for Marine/Car Sound System, 30Hz-200Hz Frequency Response, Dual 4-Ohm Voice Coils & Polypropylene Woofer Cone

  • Based on 188 reviews
Condition: New
Checking for the best price...
$100.00 Why this price?
Save $109.97 was $209.97

Buy Now, Pay Later

As low as $16.67 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, May 11
Order within 10 hours and 43 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Features

  • POWERFUL 8 INCH SUBWOOFER FOR CAR & MARINE - The Polk DB842 DVC 8" Marine Certified sub is a space-saving sub with 750W peak power and features a polypropylene woofer cone and a durable Santoprene surround built to handle big power over the long run
  • CAR AUDIO HARD-HITTING BASS - With Dynamic Balance Technology, a Polk Audio proprietary, this marine 8 subwoofer uses laser imaging to identify the best combination of speaker materials, ensuring distortion-free response with wide sound dispersion
  • SPLASH-PROOF SOUND SYSTEM - Polk DB+ series speakers & marine subwoofer give thunderous sonic output in freshwater boats, motorcycles, ATVs, etc. as they have IP56 marine certification with coated steel baskets; tested for salt-fog, UV & humidity
  • WALLET-FRIENDLY POLK AUDIO SUBWOOFER - Experience powerful and smooth bass like never before with this compact car subwoofer; designed with cutting-edge technology and premium materials, this affordable sub is the ultimate choice for an audio system
  • MULTIPLE WIRING OPTIONS - Dual 4-ohm coils on this Polk subwoofer speaker let car audio subwoofers wire parallel at 2-ohm or series at 8-ohm for custom configs and wide system compatibility for those interested in car audio customization

Brand: Polk Audio


Speaker Maximum Output Power: 750 Watts


Frequency Response: 200 Hz


Connectivity Technology: RCA or Speaker Wire


Audio Output Mode: Surround


Mounting Type: Boat Mount,Car Mount


Material: Steel, Polypropylene


Model Name: DB842 DVC


Speaker Type: Subwoofer


Special Feature: Waterproof


Recommended Uses For Product: For Car, For Marine


Compatible Devices: car


Subwoofer Diameter: 8 Inches


Unit Count: 1.0 Count


Surround Sound Channel Configuration: 2.1


Color: Black


Included Components: Literature, Speaker


Product Dimensions: 11.03"D x 11.34"W x 6.78"H


Item Weight: 5 Pounds


Impedance: 4 Ohms


Is Waterproof: FALSE


Warranty Type: Limited


Number of Items: 1


Control Method: Touch


Wireless Communication Technology: No Wireless Communication Technology


Speaker Size: 8 Inches


Power Source: Corded Electric


Woofer Diameter: 8 Inches


Water Resistance Level: Not Water Resistant


Customer Package Type: Standard Packaging


Audio Driver Type: Dynamic Driver


Audio Driver Size: 8 Inches


Subwoofer Connectivity Technology: Wired


Number of Power Levels: 1


Specific Uses For Product: Car, boat, ATV


UPC: 747192128180


Style: Speakers


Manufacturer: Polk Audio


Shape: rectangular


Set Name: DB+ Series


Item Weight: 5 pounds


Department: Car Subwoofer


Item model number: AA9843


Is Discontinued By Manufacturer: No


Date First Available: June 30, 2017


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, May 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great little sub!
Style: Speakers
I used this to replace the factory sub in my older Tundra. It sounds great, even on a factory amp. It took some slight modification to fit, but it was worth it.
Reviewed in the United States on March 4, 2026 by Kyle Jones
    • Amazing quality 8" subwoofer for the price!
Style: Speakers
Nothing bad to say about this subwoofer. Was going to go with a much more expensive brand but it ended up being a little too deep for the box I was putting it in. This is sounding much better than the previous sub I had. Has been handling the power im throwing at it. I would recommend this sub to anyone. ... show more
Reviewed in the United States on December 16, 2023 by Kevin J
    • Punch
Style: Speakers
Has great punch. After a few hours of break in the sub sounds great. Replaced the factory sub 2016 MDX. On stock amp, an upgraded amp on this sub would sound even better. Best sub for this price
Reviewed in the United States on December 20, 2024 by Aaron
    • Economic upgrade that sounds good.
Style: Speakers
Nice upgrade for a 2015 Porsche Cayenne diesel
Reviewed in the United States on July 25, 2025 by Binh Le
    • Lexus ls430
Style: Speakers
Was able to wire the two voice coils in series as to not fry my amp. Sounds good but is a tight fit and not as much kick as I would have wanted. Handles bass well though.
Reviewed in the United States on October 5, 2024 by Very good
    • Good product
Style: Speakers
Good product
Reviewed in the United States on April 22, 2025 by Adalia smith
    • Bent
Style: Speakers
Not so great
Reviewed in the United States on March 8, 2026 by John Maldonado
    • What a sub!
Style: Speakers
These subwoofers really pound. I have an 8 dvc, and a 10 svc, and i love the sound of both 8 and 10. I have other subwoofers in my build, I have a 10" Kicker cvr, and a 8", and two 6.5" Memphis prx. And the polks are by far my favorite, the sound quality of the polks is a good sound, warm but punchy. And these are cheaper than all of the other ones, and that really makes them better. ... show more
Reviewed in the United States on February 18, 2023 by Justin

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...