Originally Posted by raptor660
WOW! Yea that program is WAY better.. SO easy to use. I just entered in approximate dimensions.
17x42x30, with a port 3x38x20. And came out with 10.35 cu ft, not including woofer dispacement. . Which maybe a little large. tuned to just under 36hz.
Your port dimension is way off! The dimensions for the port in the ExpoSport Calc (as I call it) are width, height and length. Since the height of your box is 17", your port is going to be 15.5" tall.....i'm assuming the 38 and 20 measurements are the length you want each wall of the port to be. That would be a 58" long port in the calc. So your port specs should be 15.5x3x58
I just plugged in those numbers and it'* not good, you'd end up with a box with an internal volume of 8.43cu.ft. and tuned to 15.10Hz., and this is before bracing and woofer displacement