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US221-4 Dual 21" Direct-Radiating Subwoofer | Fulcrum Acoustic
9921b: 1500w to 2500w - 21 Inch Power Tuned Subwoofer - DD Audio
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Dayton Audio - PSS555-8 21" Pro Subwoofer with 4.5” Voice Coil 8 Ohm
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Apocalypse DB-SA521 NEO | 21 inch Subwoofer
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STLF-21500A | 21" Cast Aluminum Frame High-Power Raw Woofer Speaker, 1 – Sound Town
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Oaktron 21” (533 mm) Ventuno 1600 Watt Subwoofer
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DS18 PRO-BX21N.2 21" Neodymium Woofer 6000 Watts 6" 2-Ohm SVC audio car home system Subwoofers
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SB-15121 Cinema Subwoofer – QSC
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Yorkville Sound SA221S Synergy Array Series Dual 21" SA221S B&H
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Amazon.com: Yorkville ES21P 2400-Watts 21-Inch Powered Subwoofer : Electronics
![DISCONTINUED] RCF TTS 56-AS Dual 21-Inch Powered Subwoofer - Sound Productions](https://cdn11.bigcommerce.com/s-mmffu4sg6a/images/stencil/1280x1280/products/22779/49982/113769d__76616.1665416391.jpg?c=1 "DISCONTINUED] RCF TTS 56-AS Dual 21-Inch Powered Subwoofer - Sound Productions")
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Eminence NSW6021-6 21" Professional Neodymium Tour Grade Subwoofer Driver
Dayton Audio - HTS545HE-4 Kraken 21" High Excursion Subwoofer with 5" Voice Coil 4 Ohm
Blastking PROFILE21 21" 4000 Watts High Output Woofer
