Eighteen Sound 15MB1000 15" High Output Speaker Woofer - Single - 18 Sound | eBay
18 Sound 18NTLW5000 18" Neodymium Subwoofer 4000W
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 18NLW4500 - 18" Subwoofer
Eighteen Sound - Professional loudspeakers
Amazon.com: 18 Sound 12MB1000 12" Woofer/8OHMS/1200W - Set of 1, Black : Electronics
18 Sound 18ID200 18 in. Ipal Car Audio Subwoofer - Walmart.com