18 Sound 18LW2600 18" Woofer 3000W 8-Ohm Designed For Use In Vented Enclosures | eBay
18-in next generation high performance subwoofer, specifically designed for high SPL very low frequency applications in either a reflex, bandpass or horn loaded configuration - Walmart.com
Eighteen Sound 18 Sound Speaker 10W402 10 Inch Woofer Speaker NEW | eBay