Shop 21 inch subwoofer box

Sponsored
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$4,995.00
BASSBOSS VS21-MK3 21 Powered Subwoofer
Musician's Friend
$4,995.00
BASSBOSS VS21-MK3 21 Powered Subwoofer
Musician's Friend
$3,389.00
Yorkville Sound Es21p 21" 2400W Powered Subwoofer
Walmart
Free shipping
$3,389.00
Yorkville Sound Es21p 21" 2400W Powered Subwoofer
Walmart
$2,699.99
LD Systems ICOA PRO SUB 21 A 21" Powered High-Performance Bass Reflex PA Subwoofer
IDjNow
$2,699.99
LD Systems ICOA PRO SUB 21 A 21" Powered High-Performance Bass Reflex PA Subwoofer
IDjNow
$3,389.00
Yorkville ES21P 21 Powered Subwoofer
Musician's Friend
2
$3,389.00
Yorkville ES21P 21 Powered Subwoofer
Musician's Friend
$2,699.99
LD Systems ICOA PRO SUB 21 21 Powered Subwoofer
Musician's Friend
$2,699.99
LD Systems ICOA PRO SUB 21 21 Powered Subwoofer
Musician's Friend
$4,805.00
DAS Audio Event 121A 21" Active Direct Radiating Rear-Loaded Subwoofer System
IDjNow
$4,805.00
DAS Audio Event 121A 21" Active Direct Radiating Rear-Loaded Subwoofer System
IDjNow
$2,699.99
LD Systems ICOA PRO SUB 21 21" Powered Subwoofer
Music & Arts
$2,699.99
LD Systems ICOA PRO SUB 21 21" Powered Subwoofer
Music & Arts
$8,099.00
BASSBOSS Makara Dbl21-MK3 Dual 21 Powered Sub With Cables
Musician's Friend
$8,099.00
BASSBOSS Makara Dbl21-MK3 Dual 21 Powered Sub With Cables
Musician's Friend
$398.00
Pierce Audio 21" Subwoofer/ Woofer Made In The Usa
eBay
$398.00
Pierce Audio 21" Subwoofer/ Woofer Made In The Usa
eBay
$791.95
$1,389.99
Harmony Audio HA-ML121 Competition Loaded Dual 12" Sub 6000W Ported SPL Sub Box
HifiSoundConnection Bing Store
Free shipping
43% off
$791.95
$1,389.99
Harmony Audio HA-ML121 Competition Loaded Dual 12" Sub 6000W Ported SPL Sub Box
HifiSoundConnection Bing Store
$7,995.00
BASSBOSS Makara Dbl21-MK3 Dual 21" Powered Sub
Music & Arts
$7,995.00
BASSBOSS Makara Dbl21-MK3 Dual 21" Powered Sub
Music & Arts
$679.95
Harmony Audio HA-ML121 Loaded 12" Sub 3000W Ported SPL Sub Box & Harmony HA-A1500.1 Amp
HifiSoundConnection Bing Store
Free shipping
$679.95
Harmony Audio HA-ML121 Loaded 12" Sub 3000W Ported SPL Sub Box & Harmony HA-A1500.1 Amp
HifiSoundConnection Bing Store
$16,198.00
BASSBOSS Pair Makara Dbl21-MK3 Dual 21" Powered Subwoofers With Cables
Guitar Center
Free shipping
$16,198.00
BASSBOSS Pair Makara Dbl21-MK3 Dual 21" Powered Subwoofers With Cables
Guitar Center
$1,242.95
Harmony Audio HA-ML121 Loaded Dual 12" Sub 6000W Vented SPL Sub Box & CXA1800.1
HifiSoundConnection Bing Store
Free shipping
$1,242.95
Harmony Audio HA-ML121 Loaded Dual 12" Sub 6000W Vented SPL Sub Box & CXA1800.1
HifiSoundConnection Bing Store
$1,999.99
JL Audio Stealthbox
Crutchfield
19
$1,999.99
JL Audio Stealthbox
Crutchfield
$2,699.99
LD Systems Icoa Pro 21 A 3,000-Watt Powered Subwoofer - Black 3,000W Powered Subwoofer With 21" Woofer And Syscore DSP - Black
Sweetwater
1
$2,699.99
LD Systems Icoa Pro 21 A 3,000-Watt Powered Subwoofer - Black 3,000W Powered Subwoofer With 21" Woofer And Syscore DSP - Black
Sweetwater
$205.69
$241.99
Sound Town 21" Raw Woofer 600W Pa Dj Replacement Low Frequency
eBay
Free shipping
15% off
$205.69
$241.99
Sound Town 21" Raw Woofer 600W Pa Dj Replacement Low Frequency
eBay
$11,945.00
RBH - UNRIVALED 21-SF/R - 21" 4000W Carbon Fiber Subwoofer (Single)
SoundApproach.com
Free shipping
$11,945.00
RBH - UNRIVALED 21-SF/R - 21" 4000W Carbon Fiber Subwoofer (Single)
SoundApproach.com
$3,389.00
Yorkville Sound ES21P, 2400W Powered Subwoofer (21-Inch)
Hollywood DJ
2
$3,389.00
Yorkville Sound ES21P, 2400W Powered Subwoofer (21-Inch)
Hollywood DJ
$16,945.00
RBH - UNRIVALED 221-SF/R - 2 X 21" Carbon Fiber Subwoofer (Single)
SoundApproach.com
Free shipping
$16,945.00
RBH - UNRIVALED 221-SF/R - 2 X 21" Carbon Fiber Subwoofer (Single)
SoundApproach.com
$3,389.00
Yorkville 21 in 2400 Watt Powered Subwoofer
Guitar Center
2
$3,389.00
Yorkville 21 in 2400 Watt Powered Subwoofer
Guitar Center
$107.78
$171.04
Rockford Fosgate P3-2X12 12X22 2400W Dual Subwoofer + Box + 2000W Amp + Amp Kit
theminutetrader
Free shipping
36% off
$107.78
$171.04
Rockford Fosgate P3-2X12 12X22 2400W Dual Subwoofer + Box + 2000W Amp + Amp Kit
theminutetrader
$1,349.99
SB-TE-3G1/10TW1 JL Audio Stealthbox® SB-TE-3G1-10TW1 Stealthbox Custom-Fit Subwoofer Enclosure For Select 2021-2024 Tesla Model 3
Sonic Electronix
$1,349.99
SB-TE-3G1/10TW1 JL Audio Stealthbox® SB-TE-3G1-10TW1 Stealthbox Custom-Fit Subwoofer Enclosure For Select 2021-2024 Tesla Model 3
Sonic Electronix
$149.00
Mega Bass Series 1X15" Square Kicekr Vented Subwoofer Box Ported
eBay
$149.00
Mega Bass Series 1X15" Square Kicekr Vented Subwoofer Box Ported
eBay
$1,149.99
JL Audio Stealthbox® SB-F-RNGSCG4/10TW1 Stealthbox Custom-Fit Loaded 10in Subwoofer Enclosure For Select 2019-2025 Ford Ranger
Sonic Electronix
$1,149.99
JL Audio Stealthbox® SB-F-RNGSCG4/10TW1 Stealthbox Custom-Fit Loaded 10in Subwoofer Enclosure For Select 2019-2025 Ford Ranger
Sonic Electronix
$849.99
JL Audio Stealthbox® SBX-F-MAVG1/10TW1 Stealthbox Custom Fit 12in Subwoofer Enclosure For Select 2022-2025 Ford Maverick
Sonic Electronix
$849.99
JL Audio Stealthbox® SBX-F-MAVG1/10TW1 Stealthbox Custom Fit 12in Subwoofer Enclosure For Select 2022-2025 Ford Maverick
Sonic Electronix
$299.98
20-21 Polaris General 1000 Xp Subwoofer Sub Woofer Speaker Box 2637563
eBay
2
Free shipping
$299.98
20-21 Polaris General 1000 Xp Subwoofer Sub Woofer Speaker Box 2637563
eBay
$419.95
DS18 GEN-X210LD 800W Peak (400W RMS) Loaded Dual 10in Ported Enclosure
Sonic Electronix
1
$419.95
DS18 GEN-X210LD 800W Peak (400W RMS) Loaded Dual 10in Ported Enclosure
Sonic Electronix
$1,399.99
JL Audio - SB-J-JK2DR/10W1v3/BK - Stealthbox One 10" 600W Peak Power H
Online Car Stereo
20
Free shipping
$1,399.99
JL Audio - SB-J-JK2DR/10W1v3/BK - Stealthbox One 10" 600W Peak Power H
Online Car Stereo
$200.00
Subwoofer Box
Etsy
Free shipping
$200.00
Subwoofer Box
Etsy
$1,209.99
Eminence Nsw6021-124 21-Inch Subwoofer 1-2-4 Ohm Selectable Woofer Pro
eBay
Free shipping
$1,209.99
Eminence Nsw6021-124 21-Inch Subwoofer 1-2-4 Ohm Selectable Woofer Pro
eBay
$1,149.99
JL Audio Stealthbox® SBX-F-BRONCG6/10TW1 Stealthbox Custom Fit 12in Subwoofer Enclosure For Select 2021-2025 Ford Bronco
Sonic Electronix
$1,149.99
JL Audio Stealthbox® SBX-F-BRONCG6/10TW1 Stealthbox Custom Fit 12in Subwoofer Enclosure For Select 2021-2025 Ford Bronco
Sonic Electronix
$450.00
Custom Subwoofer Boxes
eBay
Free shipping
$450.00
Custom Subwoofer Boxes
eBay
$1,449.99
JL Audio Stealthbox® SB-F-EXPED4G/10TW1 Stealthbox Custom-Fit Loaded 10in Subwoofer Enclosure For 2018-2024 Ford Expedition, Expedition Max
Sonic Electronix
$1,449.99
JL Audio Stealthbox® SB-F-EXPED4G/10TW1 Stealthbox Custom-Fit Loaded 10in Subwoofer Enclosure For 2018-2024 Ford Expedition, Expedition Max
Sonic Electronix
21 Inch GSG Audio DIY Subwoofer build guide! ► Order with code: Jilesgsg
15:58
Find in video from 13:47Installing the Speaker
21 Inch GSG Audio DIY Subwoofer build guide! ► Order with code: Ji…
48.4K viewsJul 20, 2020
YouTubeJiles McCoy
how we produce the dual 21 inch subwoofer F221
7:06
how we produce the dual 21 inch subwoofer F221
94.5K viewsNov 2, 2022
YouTubeStefan Sanway Audio
21 Inch DIY Subwoofer build guide! The best GSG sub for your Home Theater.
29:37
Find in video from 16:33Building the Enclosure
21 Inch DIY Subwoofer build guide! The best GSG sub for your Home …
391.5K viewsDec 21, 2019
YouTubeJiles McCoy
Massive 21" Subwoofer!! Eminence Pro Audio NSW6021 for GSG Evolution Enclosure
6:02
Find in video from 00:23Unboxing
Massive 21" Subwoofer!! Eminence Pro Audio NSW6021 for GSG Evol…
9.2K viewsJun 7, 2023
YouTubeLife of Bliss
DIY Test BV 21 inch Subwoofer box
8:28
DIY Test BV 21 inch Subwoofer box
36.3K viewsApr 15, 2021
YouTubeDIY Production
BASSBOSS | VS21 Single 21" Powered Subwoofer Discussion with David Lee
4:00
Find in video from 00:25The 21 inch woofer
BASSBOSS | VS21 Single 21" Powered Subwoofer Discussion w…
21.7K viewsApr 19, 2021
YouTubeBASSBOSS BASS
RCF TTS56 A 21" Neodymium Dual Subwoofer 🔊🔥💥 | RCF 21 Inch Dual Subwoofer
1:35
RCF TTS56 A 21" Neodymium Dual Subwoofer 🔊🔥💥 | RCF 21 Inch Dual Su…
47.6K viewsJul 25, 2022
YouTubeRATHOD SOUND SYSTEMS
1:05
Meyer Sound’s New 2100-LFC Single-21” Subwoofer
12.3K viewsJan 25, 2023
YouTubefohtv
10:04
LOUDEST 21" SUBWOOFERS I HAVE EVER HEARD!
44.3K viewsAug 16, 2023
YouTubeJacobViral
23:35
Ported Vs Sealed Subwoofer Box Review 🔈
4.4K views9 months ago
YouTubeTNG11 Automotive
2:33
Find in video from 00:26Unboxing the Subwoofer
21 INCH SUBWOOFER! *Incriminator audio judge series*
974 viewsAug 21, 2022
YouTubeMr A
6:02
RCF SUB 8005 21 INCH INSPIRED | FULL PLAN
22.3K viewsJan 27, 2021
YouTubeSPEAKERBOX PLAN
8:10
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LOUDEST 21" SUBWOOFER DUAL SUB SYSTEM I HAVE EVER HEARD!
50.8K viewsDec 14, 2022
YouTubeJacobViral
35:39
Find in video from 03:14Measuring and Adjusting the Box
Building a Ported Subwoofer Box for DEEP BASS!!! How To Design & B…
2.3M viewsNov 26, 2019
YouTubeEXOcontralto
8:18
Bronco Tailgate Subwoofer Enclosure Installation | '21 - Curre…
3.7K views10 months ago
YouTubeTrail Seven
10:27
Building an Underseat Subwoofer Box - Assembly and Angled Corne…
22.1K viewsNov 25, 2024
YouTubeCarAudioFabrication
3:37
Martin Audio WS18X Plan with Cutting Guide | Complete DIY Spe…
654 views3 months ago
YouTubeDIY Planet
13:47
Build a Subwoofer Box with (almost) no tools.
239.2K viewsSep 22, 2024
YouTubeDIY Audio Guy
10:56
Find in video from 03:06Assembling the Box
Building a Bandpass Subwoofer Box | 4th Order Sub Enclosure Bui…
1.9M viewsAug 1, 2014
YouTubeEXOcontralto
16:58
Find in video from 00:35Designing a Ported Subwoofer Box
How to Design a Ported Subwoofer Box
54.1K viewsJan 14, 2024
YouTubeDIY Audio Guy
8:45
Find in video from 02:54Assembling the Enclosure
12" Ported Subwoofer box build! Side port for low bass.
30.7K viewsMar 24, 2024
YouTubeDIY Audio Guy
10:10
Find in video from 02:16The Reason for 21"
LOUDEST 2 21" SUBWOOFERS IN A CAR
6.3K viewsOct 5, 2023
YouTubeJacobViral
12:32
Wiring your subwoofers for more power and more bass!
455.7K views1 year ago
YouTubeDIY Audio Guy
11:33
Instructions for designing the most detailed subwoofer enclosures - 1…
965.3K viewsAug 18, 2022
YouTubeDIY Production
17:17
Custom Subwoofer Box Build in Just 20 Minutes
33.8K views11 months ago
YouTubeCambridge Car Audio
8:43
Find in video from 03:41Assembling the Subwoofer Box
Build a BETTER subwoofer box - CUSTOM design for your exact su…
1.3M viewsMar 9, 2015
YouTubeCarAudioFabrication
16:37
21" Subwoofers ARE HUGE!!! Un-Boxing B2 XM21 Subwoofer & Ho…
364.2K viewsJan 31, 2017
YouTubeEXOcontralto
1:21
[PLAN] 21 INCH Horn Dual 4th ORDER SUBWOOFER
7.9K viewsNov 2, 2021
YouTubeMrFlexy SMPS
16:07
21” SUBWOOFER Tested: Uncovering the Secret World of Hi…
3.2K views9 months ago
YouTubeHatoraid Cowboy Cinema
0:49
How to assemble the dual 21 inch subwoofer Sanway audio F221
3K viewsNov 3, 2022
YouTubeStefan Sanway Audio
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Shop 21 inch subwoofer box

Sponsored
About our ads
$4,995.00
BASSBOSS VS21-MK3 21 Powered Subwoofer
Musician's Friend
$4,995.00
BASSBOSS VS21-MK3 21 Powered Subwoofer
Musician's Friend
$3,389.00
Yorkville Sound Es21p 21" 2400W Powered Subwoofer
Walmart
Free shipping
$3,389.00
Yorkville Sound Es21p 21" 2400W Powered Subwoofer
Walmart
$2,699.99
LD Systems ICOA PRO SUB 21 A 21" Powered High-Performance Bass Reflex PA Subwoofer
IDjNow
$2,699.99
LD Systems ICOA PRO SUB 21 A 21" Powered High-Performance Bass Reflex PA Subwoofer
IDjNow
$3,389.00
Yorkville ES21P 21 Powered Subwoofer
Musician's Friend
2
$3,389.00
Yorkville ES21P 21 Powered Subwoofer
Musician's Friend
$2,699.99
LD Systems ICOA PRO SUB 21 21 Powered Subwoofer
Musician's Friend
$2,699.99
LD Systems ICOA PRO SUB 21 21 Powered Subwoofer
Musician's Friend
$4,805.00
DAS Audio Event 121A 21" Active Direct Radiating Rear-Loaded Subwoofer System
IDjNow
$4,805.00
DAS Audio Event 121A 21" Active Direct Radiating Rear-Loaded Subwoofer System
IDjNow
$2,699.99
LD Systems ICOA PRO SUB 21 21" Powered Subwoofer
Music & Arts
$2,699.99
LD Systems ICOA PRO SUB 21 21" Powered Subwoofer
Music & Arts
$8,099.00
BASSBOSS Makara Dbl21-MK3 Dual 21 Powered Sub With Cables
Musician's Friend
$8,099.00
BASSBOSS Makara Dbl21-MK3 Dual 21 Powered Sub With Cables
Musician's Friend
$398.00
Pierce Audio 21" Subwoofer/ Woofer Made In The Usa
eBay
$398.00
Pierce Audio 21" Subwoofer/ Woofer Made In The Usa
eBay
$791.95
$1,389.99
Harmony Audio HA-ML121 Competition Loaded Dual 12" Sub 6000W Ported SPL Sub Box
HifiSoundConnection Bing Store
Free shipping
43% off
$791.95
$1,389.99
Harmony Audio HA-ML121 Competition Loaded Dual 12" Sub 6000W Ported SPL Sub Box
HifiSoundConnection Bing Store
$7,995.00
BASSBOSS Makara Dbl21-MK3 Dual 21" Powered Sub
Music & Arts
$7,995.00
BASSBOSS Makara Dbl21-MK3 Dual 21" Powered Sub
Music & Arts
$679.95
Harmony Audio HA-ML121 Loaded 12" Sub 3000W Ported SPL Sub Box & Harmony HA-A1500.1 Amp
HifiSoundConnection Bing Store
Free shipping
$679.95
Harmony Audio HA-ML121 Loaded 12" Sub 3000W Ported SPL Sub Box & Harmony HA-A1500.1 Amp
HifiSoundConnection Bing Store
$16,198.00
BASSBOSS Pair Makara Dbl21-MK3 Dual 21" Powered Subwoofers With Cables
Guitar Center
Free shipping
$16,198.00
BASSBOSS Pair Makara Dbl21-MK3 Dual 21" Powered Subwoofers With Cables
Guitar Center
$1,242.95
Harmony Audio HA-ML121 Loaded Dual 12" Sub 6000W Vented SPL Sub Box & CXA1800.1
HifiSoundConnection Bing Store
Free shipping
$1,242.95
Harmony Audio HA-ML121 Loaded Dual 12" Sub 6000W Vented SPL Sub Box & CXA1800.1
HifiSoundConnection Bing Store
$1,999.99
JL Audio Stealthbox
Crutchfield
19
$1,999.99
JL Audio Stealthbox
Crutchfield
$2,699.99
LD Systems Icoa Pro 21 A 3,000-Watt Powered Subwoofer - Black 3,000W Powered Subwoofer With 21" Woofer And Syscore DSP - Black
Sweetwater
1
$2,699.99
LD Systems Icoa Pro 21 A 3,000-Watt Powered Subwoofer - Black 3,000W Powered Subwoofer With 21" Woofer And Syscore DSP - Black
Sweetwater
$205.69
$241.99
Sound Town 21" Raw Woofer 600W Pa Dj Replacement Low Frequency
eBay
Free shipping
15% off
$205.69
$241.99
Sound Town 21" Raw Woofer 600W Pa Dj Replacement Low Frequency
eBay
$11,945.00
RBH - UNRIVALED 21-SF/R - 21" 4000W Carbon Fiber Subwoofer (Single)
SoundApproach.com
Free shipping
$11,945.00
RBH - UNRIVALED 21-SF/R - 21" 4000W Carbon Fiber Subwoofer (Single)
SoundApproach.com