3pcs / Set 3 Inch DIY Audio Subwoofer for Box, Car, Ship, 15W, 4 - Walmart.com
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SOTAMIA 1Pc 4 Inch Subwoofer 4 Ohm 15W HiFI Speaker Column 20 Core Rubber Edge Super Bass Speaker Sound Home Theater Loudspeaker - AliExpress
Scanspeak 15W/4531G Revelator 5.5" Woofer, 4 ohm
3pcs / Set 3 Inch DIY Audio Subwoofer for Box, Car, Ship, 15W, 4 - Walmart.com
Amazon.com: 1pcs 3 Inch Fiberglass Full Range Speaker 4/8Ohm 15W Waterproof Audio Bookshelf Speaker Unit Home Theater Loudspeaker (Size : 8Ohm) : Electronics