Atrend 8 inch Single Vented SPL Tune Subwoofer Box - Improves Audio Quality, Sound & Bass - Woofer Specific Enclosure Certified - Designed, Engineered in USA - Nickel Finish Speaker Terminal
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JAM Systems S118 Single Subwoofer Cabinet for 1 x 18" Driver - Assembled £250.00
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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 (4 Pack) : Target
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Build Your Own Subwoofer or 2-Way Full Range Cabinet!