21 Inch Subwoofers

Best Buy customers often prefer the following products when searching for 21 Inch Subwoofers.

Browse the top-ranked list of 21 Inch Subwoofers below along with associated reviews and opinions.

  1. 1.
    KICKER - VSS™ SubStage™ 10" Dual-Voice-Coil 1-Ohm Subwoofer with Enclosure and Integrated 200W Amp - Black Grained-Front_Standard

    • Model: SCRU11
    • SKU: 5802022
    Not yet reviewed
    Enjoy quality sound with this Kicker subwoofer upgrade kit. It connects to the original audio components of your 2011-2015 Chevrolet Cruze auto to create a high-performance system that delivers strong bass tones. This Kicker subwoofer upgrade kit has a multichannel DSP amplifier that provides acoustic control while drawing minimal power. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  2. 2.
    Sonance - Sonance Landscape Series 15" Passive Subwoofer - Dark Brown-Front_Standard

    • Model: LS15T SUB
    • SKU: 6253966
    Not yet reviewed
    The LS15T SUB includes a wide bandwidth Sonance Laminated Core Transformer with an adjustable tap, making it flexible and powerful for any outdoor landscape application.
  3. 3.
    KICKER - CompC Loaded Enclosures Single-Voice-Coil 4-Ohm Subwoofer - Black carpet-Front_Standard

    • Model: 44TCWC104
    • SKU: 5712388

    5 stars...Good Sub...NOT OVER THE TOP THUMP THUMP THUMP IF YOU KNOW WHAT I MEAN, GREAT RECOMMENDATION BY DAVE,FILLS IN THE MISSING BASS I WAS LOOKING FOR...I got two of these installed in my Yukon Denali and they are amazing!

    Boost the enjoyment of your car stereo with this Kicker CompC enclosure. The compact size is easy to install and fits smartly underneath or behind a seat, and the heavy MDF construction offers uncompromising durability. This Kicker CompC enclosure is compatible with CX600 1 subwoofers and provides a custom port design. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  4. 4.
    KICKER - CompC Loaded Enclosures Single-Voice-Coil 2-Ohm Subwoofer - Black carpet-Front_Standard

    • Model: 44TCWC102
    • SKU: 6254104
    Not yet reviewed
    The CompC thin profile 10-inch subwoofer enclosure comes loaded a single 2-Ohm terminal. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  5. 5.
    SVS - 16" 1500W Powered Subwoofer - Black Oak Veneer-Front_Standard

    • Model: PB16-ULTRA - BLACK OAK - 120V
    • SKU: 5708035

    Its amazing...Great speaker....In my years of owning higher end gear and searching for something that could somehow make the viewing experience more enjoyable....I can run my 2 pb2000's full volume tuned and them not be as loud as the 16 ultra.

    Increase the bass output of your home stereo system with this 16-inch SVS subwoofer. It provides robust lows for your next party or event thanks to 1500W of continuous power, and it has a fiberglass-resin composite driver that doesn't flex or lose control with increased volumes. This SVS subwoofer has a front-panel display for easy control.
  6. 6.
    SVS - 16" 1500W Powered Subwoofer - Gloss piano black-Front_Standard

    • Model: PB16-ULTRA - PIANO GLOSS - 120
    • SKU: 5708037

    Its amazing...Great speaker....In my years of owning higher end gear and searching for something that could somehow make the viewing experience more enjoyable....I can run my 2 pb2000's full volume tuned and them not be as loud as the 16 ultra.

    Entertain yourself with this SVS subwoofer. Its 16-inch driver produces 1500W of continuous power and has a 5000W peak capacity for high-quality performance, and the Sledge STA-1500D amplifier uses discrete MOSFET output to push the subwoofer's power limits. This SVS subwoofer has a structurally sound cabinet that lessens the chance of unwanted resonance.
  7. 7.
    KICKER - VSS™ SubStage™ 10" Dual-Voice-Coil 1-Ohm Subwoofer with Enclosure and Integrated 200W Amp - Black Grained-Front_Standard

    • Model: SSICRE07
    • SKU: 5802025
    Not yet reviewed
    Get the sound you want with these Kicker Silverado/Sierra crew cab subwoofers. They have an original factory design, so they look great in your truck, and they are high efficiency, ensuring minimum drain on your battery. These Kicker Silverado/Sierra crew cab subwoofers can be mounted without modifications to your interior. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  8. 8.
    KICKER - VSS™ SubStage™ 10" Dual-Voice-Coil 1-Ohm Subwoofer with Enclosure and Integrated 200W Amp - Black Grained-Front_Standard

    • Model: SCHAL08
    • SKU: 5802028
    Not yet reviewed
    Enhance your car's audio quality with this Kicker subwoofer upgrade kit. The multichannel amplifiers use minimal battery power and provide DSP technology suited expressly to your vehicle. This Kicker subwoofer upgrade kit lets deep bass tones pound and is designed to fit the original factory specifications of the 2008-2014 Dodge Challenger. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  9. 9.
    KICKER - VSS™ SubStage™ 10" Dual-Voice-Coil 1-Ohm Subwoofer with Enclosure and Integrated 200W Amp - Black Grained-Front_Standard

    • Model: SSIEXT07
    • SKU: 5802031
    Not yet reviewed
    Turn commutes into in-car parties with this Kicker subwoofer upgrade system for 2007-2013 Chevrolet Silverado models. Low power-draw amplifiers provide enhanced audio detail, while booming bass tones keep the beat going. The quick installation of this Kicker subwoofer upgrade system requires no modifications to your car, and the factory-look parts blend in seamlessly. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  10. 10.
    KICKER - VSS™ SubStage™ 10" Dual-Voice-Coil 1-Ohm Subwoofer with Enclosure and Integrated 200W Amp - Black Grained-Front_Standard

    • Model: SSICRE14
    • SKU: 5802019
    Not yet reviewed
    Party in the car with this Kicker subwoofer upgrade system for the 2014-2016 Chevrolet Silverado. It instantly introduces soul-moving bass sounds into your cabin, and its easy installation requires no modifications. Take advantage of the enhanced audio detail provided by the extra efficient, low-power-draw amplifiers of this Kicker subwoofer upgrade system. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  11. 11.
    Pioneer - 12" Single-Voice-Coil Subwoofer with Enclosure - Black-Angle_Standard

    • Model: TSSWX3002
    • SKU: 5588603

    Good price...Good Bass sound...Wasn't expecting much out of this subwoofer, but I was impressed when I heard the bass!...Is very good subwoofer, and good to small space, I really feel happy with my new speaker.

    Pump out more bass with this Pioneer car subwoofer. Its reinforced MICA injection-molded resin cone stays rigid, while tight, deep bass sounds are produced with up to 400W nominal power. This 12-inch shallow-mount Pioneer car subwoofer is compact and comes with a carpeted nonslip enclosure for easy installation and long-lasting durability. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  12. 12.
    SVS - 13-1/2" 1200W Powered Subwoofer - Gloss Piano Black-Front_Standard

    • Model: PB-4000-PIANO GLOSS
    • SKU: 6174938

    Highly recommended....Exceeded my expectations...Does a super job in trembling the room in action packed movies.

    Fine-tune your bass experience with this SVS ported box subwoofer. It works with the SVS app for easy adjustment of EQ, crossover and other DSP settings, and its cool-running 1200W Class-D amplifier provides efficient yet powerful performance. Select from standard, extended and sealed modes to achieve a desired frequency response of this flexible SVS ported box subwoofer.
  13. 13.
    SVS - 13-1/2" 1200W Powered Subwoofer - Premium Black Ash-Front_Standard

    • Model: PB-4000-BLACK ASH
    • SKU: 6174941

    Highly recommended....Exceeded my expectations...Does a super job in trembling the room in action packed movies.

    Feel the dynamics of subtle or intense bass details with this SVS ported box subwoofer. Its front-firing 13.5-inch driver provides low-frequency extension down to 13Hz for enhanced sonic accuracy, and it lets you fine-tune its DSP settings via the SVS app. The 1200W Class D amplifier of this SVS ported box subwoofer keeps powerful bass details clean and precise.
  14. 14.
    Sonance - Rock 10" Passive Woofer (Each) - Granite-Front_Standard

    • Model: RK10W BROWN
    • SKU: 5683414
    Not yet reviewed
    Wire your backyard for beautiful audio with this Sonance woofer. Its boulder-shaped polypropylene exterior lets it blends easily into outdoor landscapes, and its weather resistance stands up to rain, snow and heat. This Sonance woofer handles up to 150 watts for clear, powerful sound, and its dual voice coil provides several wiring options.
  15. 15.
    Sonance - Rock 10" Passive Woofer (Each) - Granite-Front_Standard

    • Model: RK10W GRANITE
    • SKU: 5683416
    Not yet reviewed
    Enjoy music from your garden with this Sonance RK10W granite subwoofer. It looks like a rock and blends in seamlessly with your plants, so you hear the sound but don’t see the equipment. This Sonance RK10W granite subwoofer enriches the bass of your system and its IPX4 rating ensures it can handle nature’s elements.

Shopping ideas related to 21 Inch Subwoofers

portable subs
Polk Audio - PSW Series 10" Active Subwoofer - Black-Angle_Standard
"Thanks, Best Buy, for carrying this brand!!!"
vibrating speakers
Klipsch - Reference 10" 300W Powered Subwoofer - Black-Front_Standard
"Big thump, clean sound"