Compare Quick view Sundown Audio Sundown Audio - X-18 v.3 High Output X Series 18" Subwoofer MSRP: Now: $849.99 Was: Sundown Audio - X-18 v.3 High Output X Series 18" Subwoofer D1/D2 The Sundown Audio X v.3 has a bigger motor and graduates to the Zv5 coil. So also more linear Xmax. Which Means More output and less... SDA-X-18V3 MSRP: Now: $849.99 Was: Compare Quick view
