LATEST SLOT PORTED CURVED DESIGN. MAX POWER: 1800WATTS (updated latest version). 12 WOOFER WITH 50 OZ MAGNETS.2 VOICE COIL WITH PP CONE. The item "Big Big Power 1800W 12 Amplified Active Subwoofer Sub Amp bass box ON SALE" is in sale since Friday, May 16, 2014. This item is in the category "Vehicle Parts & Accessories\In-Car Technology, GPS & Security\In-Car Entertainment\Subwoofers". The seller is "caraudioz" and is located in London. This item can be shipped worldwide.