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Ghxamp 30w 3 Inch Subwoofer Full Range Bass Speaker Unit Long-stroke Portable Loudspeaker Aluminum Basin Rubber 3ohm 1pcs - Speakers - AliExpress
BARRY JOHN 4 Inch subwoofer Speaker 4 ohm 30 Watt HiFi Woofer Deep Bass for Home Theater (Pack of 2) Price: Buy BARRY JOHN 4 Inch subwoofer Speaker 4 ohm 30 Watt
Sundown Audio U18v2 18 inch Dual 4 ohm Subwoofer U Series(1750 watts) – Droppin HZ Car Audio
Type 1] Senior Sound: 4inch 4ohm 30Watt Subwoofer Multimedia Speaker