8" W3v3 subwoofer in ported enclosure. OPEN BOX JL Audio Microsub+ 250-watt 8" Powered Subwoofer - ACP108LG-W3V3. Rigid, Smittybilt, ARB, Westin and hundreds more! woofer impedance: 0.4 ohms. It has never been installed and all installation accessories provided by the manufacturer will be included.