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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.

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

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  1. Product Description

    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.
    Your price for this item is $2,999.98

    Product Description

    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.
  2. Top comment

    "5 stars...Love it...It sounds better than I could have ever imagined for the price that I paid.Truly thankful, these two, especially Joe, deserved a huge tip or bonus but I was cashless....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"

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    Product Description

    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.
    Your price for this item is $149.99
    Top comment

    "5 stars...Love it...It sounds better than I could have ever imagined for the price that I paid.Truly thankful, these two, especially Joe, deserved a huge tip or bonus but I was cashless....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"

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    Product Description

    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.
  3. Product Description

    Eurolive B1800XP active subwoofer provides the ultimate in low-frequency reproduction, and the built-in stereo crossover makes it ideally suited for use with any of active 2-way loudspeakers. Packed with a powerful Class-D amplifier, a Turbosound long-excursion low-frequency transducer and an incredible array of professional features, the B1800XP produces extreme levels of low-end punch, with the definition and clarity typically reserved for much larger systems!
    Your price for this item is $699.99

    Product Description

    Eurolive B1800XP active subwoofer provides the ultimate in low-frequency reproduction, and the built-in stereo crossover makes it ideally suited for use with any of active 2-way loudspeakers. Packed with a powerful Class-D amplifier, a Turbosound long-excursion low-frequency transducer and an incredible array of professional features, the B1800XP produces extreme levels of low-end punch, with the definition and clarity typically reserved for much larger systems!
  4. Model:PB16-ULTRA - BLACK OAK - 120V
    SKU:5708035
    Top comment

    "Its amazing...Great speaker....I have purchased 2 of the pb16s and absolutely love them they will shake your entire house and everything in it great subs worth every penny!...I can run my 2 pb2000's full volume tuned and them not be as loud as the 16 ultra."

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    Product Description

    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.
    Your price for this item is $2,499.98
    Top comment

    "Its amazing...Great speaker....I have purchased 2 of the pb16s and absolutely love them they will shake your entire house and everything in it great subs worth every penny!...I can run my 2 pb2000's full volume tuned and them not be as loud as the 16 ultra."

    ""

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    Product Description

    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.
  5. Top comment

    "Good price...very solid bass...It's paired with a amp I had in the garage like 200rms nothing special and the subwoofer sound great I plan to buy two more for my car one of these days...Wasn't expecting much out of this subwoofer, but I was impressed when I heard the bass!"

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    Product Description

    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.
    Your price for this item is $249.99
    Top comment

    "Good price...very solid bass...It's paired with a amp I had in the garage like 200rms nothing special and the subwoofer sound great I plan to buy two more for my car one of these days...Wasn't expecting much out of this subwoofer, but I was impressed when I heard the bass!"

    ""

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    Product Description

    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.
  6. Product Description

    Complete your vehicle's subwoofer installation with this Kicker L7 12-inch loaded subwoofer enclosure. The unique design boosts bass for a rich listening experience, and the streamlined shape brings a professional look to your audio system. With a simple setup, this Kicker L7 12-inch loaded subwoofer enclosure offers fast, hassle-free installation.
    Your price for this item is $499.99
    Price Drop
    Save $200
    The previous price was $699.99

    Product Description

    Complete your vehicle's subwoofer installation with this Kicker L7 12-inch loaded subwoofer enclosure. The unique design boosts bass for a rich listening experience, and the streamlined shape brings a professional look to your audio system. With a simple setup, this Kicker L7 12-inch loaded subwoofer enclosure offers fast, hassle-free installation.
  7. Top comment

    "Awesome medium sized sub...Hands down the best relatively compact sub!...In my room, I can get a FLAT corrected EQ curve to 15Hz at about 75db from Anthem Room Correction, WOW!...The KEF is an understated sub that does not draw much attention, which is good for the decor and spouse approval."

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    Product Description

    Feel the bass with this 12-inch KEF Kube subwoofer. Its built-in Class D amplifier connects directly to mixers, reducing the need for extra cables, and the 114dB output provides a pulsating boom that fills a large room. This sealed KEF Kube subwoofer's flexible configuration lets you design a sound system to match your space.
    Your price for this item is $699.98
    Top comment

    "Awesome medium sized sub...Hands down the best relatively compact sub!...In my room, I can get a FLAT corrected EQ curve to 15Hz at about 75db from Anthem Room Correction, WOW!...The KEF is an understated sub that does not draw much attention, which is good for the decor and spouse approval."

    ""

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    Product Description

    Feel the bass with this 12-inch KEF Kube subwoofer. Its built-in Class D amplifier connects directly to mixers, reducing the need for extra cables, and the 114dB output provides a pulsating boom that fills a large room. This sealed KEF Kube subwoofer's flexible configuration lets you design a sound system to match your space.
  8. Product Description

    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.
    Your price for this item is $539.98

    Product Description

    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.
  9. Model:1064606 S 810 SUBWOOFER
    SKU:6318117

    Product Description

    Upgrade your listening sessions with this Jamo subwoofer. Its 10-inch polyfiber woofer delivers strong bass to complement the high frequencies in musical selections, and the 150W Class D amplifier maximizes the power of the low tones while maintaining sound quality. The contemporary design of this Jamo subwoofer lets it blend seamlessly into your decor.
    Your price for this item is $299.00

    Product Description

    Upgrade your listening sessions with this Jamo subwoofer. Its 10-inch polyfiber woofer delivers strong bass to complement the high frequencies in musical selections, and the 150W Class D amplifier maximizes the power of the low tones while maintaining sound quality. The contemporary design of this Jamo subwoofer lets it blend seamlessly into your decor.
  10. Top comment

    "Great sub...Best Bass!!...In addition to the battle sequences, the R115SW also enhanced some of the ambient bass sounds that I did not notice before; in particular, in the woods you will notice several rumbles that were not tied to any explosion or musket shot....Back in the audible range, the R-115SW can faithfully reproduce more of the nuances of bass instruments in live music."

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    Product Description

    The R-115SW subwoofer is the perfect combination of power, sophisticated and heart-pounding bass. Packing a serious punch, the R-115SW will not only wake your neighbors, it'll piss them off. The way only Klipsch can.
    Your price for this item is $899.98
    Top comment

    "Great sub...Best Bass!!...In addition to the battle sequences, the R115SW also enhanced some of the ambient bass sounds that I did not notice before; in particular, in the woods you will notice several rumbles that were not tied to any explosion or musket shot....Back in the audible range, the R-115SW can faithfully reproduce more of the nuances of bass instruments in live music."

    ""

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    Product Description

    The R-115SW subwoofer is the perfect combination of power, sophisticated and heart-pounding bass. Packing a serious punch, the R-115SW will not only wake your neighbors, it'll piss them off. The way only Klipsch can.
  11. Model:SB16-ULTRA - BLACK OAK - 120V
    SKU:5708038
    Top comment

    "best speaker...Beyond Amazing...I started with 1 and was so impressed that I ordered a 2nd for a dual setup....Best subwoofer on the market by far, Wow you really hear all of the low bass sounds that you wouldn't hear, nearly with just basic speaker set up, It's like you're sitting inside movie theater"

    ""

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    Product Description

    Add powerful bass to your favorite tunes with this SVS Audio subwoofer. The 16-inch driver delivers a massive 1500W of power, while the fiberglass-resin composite cabinet and rigid internal bracing handles extreme volume outputs without flexing. The accompanying smartphone app provides real-time control over this SVS Audio subwoofer from afar.
    Your price for this item is $1,999.98
    Top comment

    "best speaker...Beyond Amazing...I started with 1 and was so impressed that I ordered a 2nd for a dual setup....Best subwoofer on the market by far, Wow you really hear all of the low bass sounds that you wouldn't hear, nearly with just basic speaker set up, It's like you're sitting inside movie theater"

    ""

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    Product Description

    Add powerful bass to your favorite tunes with this SVS Audio subwoofer. The 16-inch driver delivers a massive 1500W of power, while the fiberglass-resin composite cabinet and rigid internal bracing handles extreme volume outputs without flexing. The accompanying smartphone app provides real-time control over this SVS Audio subwoofer from afar.
  12. Model:SB16-ULTRA - PIANO GLOSS - 120
    SKU:5708039
    Top comment

    "best speaker...Beyond Amazing...I started with 1 and was so impressed that I ordered a 2nd for a dual setup....I sure that I don't have it setup perfect."

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    Product Description

    Listen to sound at incredible volume with this 16-inch SVS Ultra subwoofer. Its 1500W RMS of power produce ultralow bass for thunderous vibrations and tone, letting you enjoy complete immersion in your tunes or movies. Fiberglass construction ensures minimal flexing and maximum sound control for distortion-free audio accuracy from this SVS Ultra subwoofer.
    Your price for this item is $1,999.98
    Top comment

    "best speaker...Beyond Amazing...I started with 1 and was so impressed that I ordered a 2nd for a dual setup....I sure that I don't have it setup perfect."

    ""

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    Product Description

    Listen to sound at incredible volume with this 16-inch SVS Ultra subwoofer. Its 1500W RMS of power produce ultralow bass for thunderous vibrations and tone, letting you enjoy complete immersion in your tunes or movies. Fiberglass construction ensures minimal flexing and maximum sound control for distortion-free audio accuracy from this SVS Ultra subwoofer.
  13. Product Description

    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.
    Your price for this item is $539.98

    Product Description

    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.
  14. Top comment

    "Awesome sub...It's exceptional and provides a great bass....This was a great buy for the amount of space I had in my 2017 Tacoma double cab."

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    Product Description

    Enjoy crystal-clear audio with this Kicker 8-inch subwoofer. Easily fit the subwoofer under the seat of your vehicle or behind your truck bench without having to modify the housing or your vehicle thanks to its compact size. The enclosure of this Kicker 8-inch subwoofer delivers deep, smooth bass wrapped together in a thin box. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
    Your price for this item is $199.99
    Top comment

    "Awesome sub...It's exceptional and provides a great bass....This was a great buy for the amount of space I had in my 2017 Tacoma double cab."

    ""

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    Product Description

    Enjoy crystal-clear audio with this Kicker 8-inch subwoofer. Easily fit the subwoofer under the seat of your vehicle or behind your truck bench without having to modify the housing or your vehicle thanks to its compact size. The enclosure of this Kicker 8-inch subwoofer delivers deep, smooth bass wrapped together in a thin box. Geek Squad® Installation Recommended Visit your local Best Buy store for more information.
  15. Product Description

    Enjoy theater sound with this sealed KEF Kube subwoofer. Its 10-inch driver provides midsized rooms with 111dB of full, resonant tones, and the 24-140Hz frequency range keeps the air pulsating with deep bass. This KEF Kube subwoofer's built-in Class D amplifier lets you connect directly to mixers and avoid cable clutter.
    Your price for this item is $599.98

    Product Description

    Enjoy theater sound with this sealed KEF Kube subwoofer. Its 10-inch driver provides midsized rooms with 111dB of full, resonant tones, and the 24-140Hz frequency range keeps the air pulsating with deep bass. This KEF Kube subwoofer's built-in Class D amplifier lets you connect directly to mixers and avoid cable clutter.