2 XR-12 EZ (4.5cf 37Hz)DIY BLUEPRINT - 2 AMERICAN BASS XR-12 SUBWOOFERSVOLUME: 4.5cf netTUNING: 37HzPORT AREA: 59.5in^2(13.22in per cube)DIMENSIONSWidth: 39inHeight: 15-1/2inDepth: 21in$15.00PriceAdd to CartBuy Now