Garage
Shop

Discontinued Polk Audio 8" Car Subwoofers

Polk Audio 8" Car Subwoofers bring powerful bass to even the smallest spaces.

Loading...
Filters

Shop the Category

filter-icon Filters & Sort
You are currently viewing discontinued products.

Polk Audio db840DVC (FREE Upgrade to 2017 Model)

180W 8" db Series Dual 4 ohm Marine Certified Subwoofer

Go to item page Right Arrow Icon of Right Arrow

180W 8" db Series Dual 4 ohm Marine Certified Subwoofer

• 360W Peak
• 180W RMS
• Dual 4 Ohm
• Marine Certified
• Santoprene Surround
• Polymer Composite Cone
• NOMEX Spider
• 4-Layer Kapton Voice Coil

• 360W Peak
• 180W RMS
• Dual 4 Ohm
• Marine Certified
• Santoprene Surround
• Polymer Composite Cone
• NOMEX Spider
• 4-Layer Kapton Voice Coil

EXCLUSIVE

500W RMS Polk Audio and Kicker 8" Bass Package

8" Dual 2 ohm Solo-Baric L7 900W Car Subwoofer + 500W RMS PA D Series Class-D 2-Channel Amplifier

Go to item page Right Arrow Icon of Right Arrow

8" Dual 2 ohm Solo-Baric L7 900W Car Subwoofer + 500W RMS PA D Series Class-D 2-Channel Amplifier

• 900W Peak
• 450W RMS
• Titanium deposit Impregnated Cone Woofer with Rolled Outer Edge
• Santoprene Rubber Surround
• Highly-Efficient UniPlate™ Pole-Piece and Back Plate
• 125 Watts RMS x 2 @ 4 ohm
• 250 Watts RMS x 2 @ 2 ohm
• 500 Watts RMS x 1 @ 4 ohm, Bridged
• Mono or 2-Channel Operation
• CEA-2006 Compliant
• Signal to Noise Ration: 105 dBA
• Selectable crossover modes: FULL / HPF / LPF

• 900W Peak
• 450W RMS
• Titanium deposit Impregnated Cone Woofer with Rolled Outer Edge
• Santoprene Rubber Surround
• Highly-Efficient UniPlate™ Pole-Piece and Back Plate
• 125 Watts RMS x 2 @ 4 ohm
• 250 Watts RMS x 2 @ 2 ohm
• 500 Watts RMS x 1 @ 4 ohm, Bridged
• Mono or 2-Channel Operation
• CEA-2006 Compliant
• Signal to Noise Ration: 105 dBA
• Selectable crossover modes: FULL / HPF / LPF

Polk Audio db840 (FREE Upgrade to 2017 Model)

180W 8" db Series Single 4 ohm Marine Certified Subwoofer

Go to item page Right Arrow Icon of Right Arrow

180W 8" db Series Single 4 ohm Marine Certified Subwoofer

• 360W Peak
• 180W RMS
• Polypropylene Cone Woofer
• Santoprene Rubber Surround
• Marine Certified
• Triple Vented 4-layer Kapton single 4 Ohm Voice Coil

• 360W Peak
• 180W RMS
• Polypropylene Cone Woofer
• Santoprene Rubber Surround
• Marine Certified
• Triple Vented 4-layer Kapton single 4 Ohm Voice Coil

Polk Audio MM840

250W 8" Mobile Monitor Series Single 4 ohm Marine Certified Car Subwoofer

Go to item page Right Arrow Icon of Right Arrow

250W 8" Mobile Monitor Series Single 4 ohm Marine Certified Car Subwoofer

• 500W Peak
• 250W RMS
• Single 4 ohm
• Polymer Woofer Cones
• Butyl Rubber Surround
• Carbon Composite Basket
• High Temperature Copper Voice Coil

• 500W Peak
• 250W RMS
• Single 4 ohm
• Polymer Woofer Cones
• Butyl Rubber Surround
• Carbon Composite Basket
• High Temperature Copper Voice Coil

Polk Audio db804DVC

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

Go to item page Right Arrow Icon of Right Arrow

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

8" Single 4 Ohm db Series Subwoofer • 180W RMS • 360W Peak • Kapton Voice Coil • Dual 4 Ohm Voice Coils • Suitable for Marine use • Santoprene Rubber Surround

8" Single 4 Ohm db Series Subwoofer • 180W RMS • 360W Peak • Kapton Voice Coil • Dual 4 Ohm Voice Coils • Suitable for Marine use • Santoprene Rubber Surround

Polk Audio MOMO MM2084DVC

8" Dual 4 ohm MOMO Series Subwoofer (MM 2084DVC)

Go to item page Right Arrow Icon of Right Arrow

8" Dual 4 ohm MOMO Series Subwoofer (MM 2084DVC)

8" Dual 4 ohm MOMO Series Subwoofer • 200W RMS • 400W Peak • dish cone design • flat NOMEX spider • stamped steel basket • anti-resonance trim gasket • nickel plated locking push terminals • sensitivity: 85dB

8" Dual 4 ohm MOMO Series Subwoofer • 200W RMS • 400W Peak • dish cone design • flat NOMEX spider • stamped steel basket • anti-resonance trim gasket • nickel plated locking push terminals • sensitivity: 85dB

Polk Audio DB842DVC (Open Box, Complete)

750W Peak (250W RMS) 8" Series Dual 4-Ohm Car Subwoofer

Go to item page Right Arrow Icon of Right Arrow

750W Peak (250W RMS) 8" Series Dual 4-Ohm Car Subwoofer

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

Polk Audio MOMO MM2084

8" Single 4 ohms MOMO Series Subwoofer (MM 2084)

Go to item page Right Arrow Icon of Right Arrow

8" Single 4 ohms MOMO Series Subwoofer (MM 2084)

8" Single 4 ohm MOMO Series Subwoofer • 200W RMS • 400W Peak • dish cone design • flat NOMEX spider • stamped steel basket • anti-resonance trim gasket • nickel plated locking push terminals • sensitivity: 85dB

8" Single 4 ohm MOMO Series Subwoofer • 200W RMS • 400W Peak • dish cone design • flat NOMEX spider • stamped steel basket • anti-resonance trim gasket • nickel plated locking push terminals • sensitivity: 85dB

Polk Audio db804

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

Go to item page Right Arrow Icon of Right Arrow

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

8" Single 4 Ohm db Series Subwoofer • 180W RMS • 360W Peak • Kapton Voice Coil • Single 4 Ohm Voice Coil • Suitable for Marine use • Santoprene Rubber Surround

8" Single 4 Ohm db Series Subwoofer • 180W RMS • 360W Peak • Kapton Voice Coil • Single 4 Ohm Voice Coil • Suitable for Marine use • Santoprene Rubber Surround

Polk Audio DB 842 SVC Damaged Packaging Only (New)

750W Peak (250W RMS) 8" Series Single 4-Ohm Car Subwoofer

Go to item page Right Arrow Icon of Right Arrow

750W Peak (250W RMS) 8" Series Single 4-Ohm Car Subwoofer

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

Polk Audio MM840DVC

250W 8" Mobile Monitor Series Dual 4 ohm Marine Certified Car Subwoofer

Go to item page Right Arrow Icon of Right Arrow

250W 8" Mobile Monitor Series Dual 4 ohm Marine Certified Car Subwoofer

• 500W Peak
• 250W RMS
• Polymer cone woofer
• Butyl rubber surround
• Advanced carbon composite basket will not flex during peaks

• 500W Peak
• 250W RMS
• Polymer cone woofer
• Butyl rubber surround
• Advanced carbon composite basket will not flex during peaks

Polk Audio DB842SVC 8” 750 Watt Car/Marine Boat Audio Subwoofer Sub+Headphones

Polk Audio DB842SVC 8” 750 Watt Car/Marine Boat Audio Subwoofer Sub+Headphones

Go to item page Right Arrow Icon of Right Arrow

Polk Audio DB842SVC 8” 750 Watt Car/Marine Boat Audio Subwoofer Sub+Headphones

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

Polk Audio MM840 Open Box

8" Single 4 ohm Marine Certified Mobile Monitor Series Car Subwoofer

Go to item page Right Arrow Icon of Right Arrow

8" Single 4 ohm Marine Certified Mobile Monitor Series Car Subwoofer

8" Marine Mobile Monitor MM Series Subwoofer • Single 4 ohm • 500 Watts Peak • 250 Watts RMS • Polymer Woofer Cones • Butyl Rubber Surround • Carbon Composite Basket • High Temperature Copper Voice Coil

8" Marine Mobile Monitor MM Series Subwoofer • Single 4 ohm • 500 Watts Peak • 250 Watts RMS • Polymer Woofer Cones • Butyl Rubber Surround • Carbon Composite Basket • High Temperature Copper Voice Coil

Polk Audio DB 842 SVC (DB842SVC) (Open Box, Great)

750W Peak (250W RMS) 8" DB+ Series Single 4-ohm Car, UTV and Marine Subwoofer

Go to item page Right Arrow Icon of Right Arrow

750W Peak (250W RMS) 8" DB+ Series Single 4-ohm Car, UTV and Marine Subwoofer

• Peak Power: 750 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 3.82"
• Sensitivity: 84 dB

• Peak Power: 750 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 3.82"
• Sensitivity: 84 dB

Polk Audio MM842 DVC

900W Peak (300W RMS) 8" MM1 Series Dual 4-ohm Marine Subwoofer

Go to item page Right Arrow Icon of Right Arrow

900W Peak (300W RMS) 8" MM1 Series Dual 4-ohm Marine Subwoofer

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Composite Polypropylene Cone - CPPC
• Santoprene Rubber surround
• Mount depth: 4"
• Sensitivity: 85 dB

VIP Star Icon

VIP Product Get $14.90 in rewards to spend later

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Composite Polypropylene Cone - CPPC
• Santoprene Rubber surround
• Mount depth: 4"
• Sensitivity: 85 dB

Polk Audio DB 842 SVC (DB842SVC)

750W Peak (250W RMS) 8" DB+ Series Single 4-ohm Car, UTV and Marine Subwoofer

Go to item page Right Arrow Icon of Right Arrow

750W Peak (250W RMS) 8" DB+ Series Single 4-ohm Car, UTV and Marine Subwoofer

• Peak Power: 750 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 3.82"
• Sensitivity: 84 dB

• Peak Power: 750 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 3.82"
• Sensitivity: 84 dB

Polk Audio DB 842 DVC (DB842DVC)

750W Peak (250W RMS) 8" DB+ Series Dual 4-ohm Car, UTV and Marine Subwoofer

Go to item page Right Arrow Icon of Right Arrow

750W Peak (250W RMS) 8" DB+ Series Dual 4-ohm Car, UTV and Marine Subwoofer

• Peak Power: 750 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 3.82"
• Sensitivity: 84 dB

VIP Star Icon

VIP Product Get $10.00 in rewards to spend later

• Peak Power: 750 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 3.82"
• Sensitivity: 84 dB

Polk Audio DB 842 DVC (DB842DVC) (Open Box, Great)

750W Peak (250W RMS) 8" DB+ Series Dual 4 ohm Car Subwoofer

Go to item page Right Arrow Icon of Right Arrow

750W Peak (250W RMS) 8" DB+ Series Dual 4 ohm Car Subwoofer

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

Polk Audio DB 842 DVC (DB842DVC) (Like New (Open Box))

750W Peak (250W RMS) 8" DB+ Series Dual 4 ohm Car Subwoofer

Go to item page Right Arrow Icon of Right Arrow

750W Peak (250W RMS) 8" DB+ Series Dual 4 ohm Car Subwoofer

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

Polk Audio DB 842 DVC (DB842DVC) (Open Box, Good)

750W Peak (250W RMS) 8" DB+ Series Dual 4 ohm Car Subwoofer

Go to item page Right Arrow Icon of Right Arrow

750W Peak (250W RMS) 8" DB+ Series Dual 4 ohm Car Subwoofer

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

• 250 Watts RMS
• 750 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

    Clear all

    Polk Audio 8" Car Subwoofers Information

    Polk Audio carries a range of 8" car subwoofers for the bass you've been looking for. Polk Audio engineers competition grade subwoofers that will both satisfy and last. Great for subwoofer boxes and other installations, these 8" Polk Audio subs are an easy choice.
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    Save up to 10 different vehicles in your garage
    Vehicle
    Store
    Delete

    1971 Saab 99

    1993 Ford Bronco

    2019 Nissan Rogue

    1983 Buick Skylark

    2005 Ford Freestyle

    2004 Buick Rendezvous

    2005 Nissan Armada

    2018 Ford Expedition

    1994 Mitsubishi Eclipse

    2010 GMC Yukon Hybrid

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm
    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue
    Loading...
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon

    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.