LAB SlapBox™ 0.35 ft^3 Ported MDF Enclosure Box for Single JL Audio 6W3v3 Subwoofer
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Amazon.com: Pyle 6" Dual Subwoofer Box System - Dual Series Vented Subwoofer Enclosure - Rear Vented Design with Built-in Illuminating LED Lights, 2 x 200 Watts Max Power, Two 4” Tweeters : Electronics
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Qpower Qbass Dual 12 Inch Heavy Duty Mdf Car Audio Subwoofer Enclosure Boxes With Shared Slot Port Vent And Dual Chamber Design, Charcoal (6 Pack) : Target
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3 ft³ @ 35Hz Ported MDF Subwoofer Enclosure Box for Single 12" Car Audio Woofer | eBay
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Dual 6.5 or 8" Dual Custom Sub Boxes with Kerf | Down4SoundShop.com
Dayton Audio 6-1/2" Down Firing Passive Mini Subwoofer Kit 100 Watts
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