2 X-18 EZ (14cf 32Hz)DIY BLUEPRINT FOR 2 X-18 SUBWOOFERSVOLUME: 14cf netTUNING: 32HzPORT AREA: 222.94in^2(15.92in per cube)DIMENSIONSWidth: 48inHeight: 21inDepth: 40in$15.00PriceAdd to CartBuy Now