Polk Audio DB 842 DVC DB+ Series shallow-mount 8″ subwoofer with dual 4-ohm voice coils
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$99.00
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Description
Hard-hitting bass
Polk Audio’s DB+ Series subwoofers combine high-tech materials and advanced design to give you smooth, powerful, hard-hitting bass without stressing your wallet. The DB 842 DVC 8″ subwoofer boasts a rigid polypropylene cone and durable Santoprene™ surround built to handle big power over the long run. Its low-profile design means you get serious performance from a sub that takes up less space.
Dual 4-ohm voice coils
This sub’s dual 4-ohm voice coils allow you to wire your system to draw max power from your mono amp or to safely hook up multiple subs. Match a DB+ sub to a suitable enclosure, and enjoy impressive bass punch rarely found in this price range. Polk Audio tests this sub rigorously for environmental effects caused by sun, moisture, and extreme temperature changes. They even certify this sub for marine applications, so they’re a great choice for your boat too.
Product highlights:
- Featured in our article: Best 8″ car subwoofers for 2025
- 8″ subwoofer with dual 4-ohm voice coils
- polypropylene cone with Santoprene rubber surround
- marine-certified for use in boats and convertibles
- handles up to 250 watts RMS (125 watts per coil)
- peak power handling: 750 watts
- frequency response: 30-200 Hz
- sensitivity: 84 dB
- top-mount depth: 3-3/4″
- sealed box volume: 0.5-1.2 cu. ft.
- ported box volume: 0.66-1.2 cu. ft.
- grille not included
- warranty: 1 year
- MFR # AA9843-A
- Item # 107DB842D
What’s in the box:
Polk Audio DB 842 DVC owner’s manual
If you need assistance accessing this owner’s manual, please give us a call.
- One 8″ subwoofer
- 1 Foam gasket
- Eight 1-3/8″ Allen head stainless steel screws
- Wiring diagram/ Specification sheet (English/ French/ Spanish/ German/ Italian)
- Online registration information
Features & specs
| Features and Specs | ||
|---|---|---|
| Size | 8-inch | |
| Impedance (Ohms) | 2, 8 | |
| Cone Material | Polypropylene Composite | |
| Surround Material | Rubber | |
| Basket Material | Steel | |
| Grille | None included | |
| Free-Air | No | |
| Dual Voice Coil | Yes | |
| Sensitivity | 84 dB at 1 watt | |
| Frequency Response | 30 – 200 Hz | |
| Max RMS Power Handling | 250 | |
| Peak Power Handling (Watts) | 750 | |
| Top Mount Depth (inches) | 3 7/8 | |
| Bottom Mount Depth (inches) | N/A | |
| Cutout Diameter or Length (inches) | 7 | |
| Frame Width | 8.452 | |
| Frame Length | 8.452 | |
| Vas (liters) | 0 | |
| Fs (Hz) | 0 | |
| Qts | 0 | |
| Xmax (millimeters) | 0 | |
| Parts Warranty | 1 Year | |
| Labor Warranty | 1 Year | |
| Box Requirements | ||
| Ideal Sealed Box Volume (cubic feet) | N/A | |
| Minimum Sealed Box Volume (cubic feet) | 0.5 | |
| Maximum Sealed Box Volume (cubic feet) | 1.2 | |
| Ideal Ported Box Volume (cubic feet) | N/A | |
| Minimum Ported Box Volume (cubic feet) | 0.66 | |
| Maximum Ported Box Volume (cubic feet) | 1.2 | |
| Port diameter (inches) | N/A | |
| Port length (inches) | N/A | |
- Polk Audio db840DVC
Product Research
Features
Dual 4Ω Voice Coils: This woofer features dual 4Ω voice coils, for wiring flexibility. When the voice coils are wired in parallel, the woofer presents a 2Ω load. When wired in series, the woofer presents an 8Ω load.
Marine Certification: Polk DB+ series speakers are marine certified (IP56 rated), making them a good choice for boats in fresh water, convertibles, motorcycles, ATVs, and other applications where the speaker might get wet. Because they have coated steel baskets and the terminals are not covered, we do not recommend using them in salt water environments.
Dynamic Balance: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion.
Sealed Box Volume: Polk recommends a sealed enclosure between 0.5 ft³ and 1.2 ft³.
Ported Box Volume: Polk recommends a ported enclosure between 0.66 ft³ and 1.2 ft³.
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