JBL JRX 218S, passive subwoofer 18", 350Watt, 4Ohm | MUSIC STORE professional
JBL VPSB7118DPDA Powered 18" Subwoofer System VPSB7118DPDA B&H
JBL 18WP600 18 in. 600 watt RMS Subwoofer - Walmart.com
JBL SUB18 High-Output Studio Subwoofer (18") SUB18 B&H Photo
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JBL SRX728S 6400W Dual 18" High Power Vented Subwoofer for sale online | eBay
JBL EON718S 18-Inch 1500-Watt Powered PA Subwoofer Speaker
Best Buy: JBL 18" 500W Portable Powered Subwoofer EON518S