Single 15" Square Vented Sub Box Air Space: 2.65 Cubic Feet Vented Enclosure Dimensions: Width 21-1/2" x Height 16-1/2" x Depth 18" Designed for Kicker L3, L5 & L7 Subwoofers Constructed with High Quality MDF High Quality Binding Terminal Cup (Accepts Banana Terminal Plugs OR Ba...