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Amazon.com: JBL Professional ASB6128 Dual High-Power 18-Inch Subwoofer System, Black : Electronics
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![Jbl Stx828s Dual 18" Passive Subwoofer 4000 watt rating 2242 woofers Stx 828 | eBay](https://i.ebayimg.com/images/g/fqoAAOSwBORjX-3X/s-l1600.jpg "Jbl Stx828s Dual 18" Passive Subwoofer 4000 watt rating 2242 woofers Stx 828 | eBay")