Mackie Thump 18S 18" 1200W Powered DJ PA Subwoofer with Professional band-pass design Dual XLR inputs Stereo high-pass and Stereo full-range outputs - Walmart.com
Mackie SRS1500 15-inch Active Subwoofer ( no shipping ) | eBay
Mackie Thump 115S 1400W 15" Powered Subwoofer – Kraft Music