i never made a ported box before, and im experimenting one for a friend.. which one would be better?? using a PVC pipe (exact port diameter + length) or building the port as a box.. like this http://www.subzoneusa.com/zv_series.htm
do you tune the box? or the amp?
also the sub requires 2 ports, and port length is 14.75" and port diameter is 3"
also anyone have a good link "how to build ported box" or tuning them or whatever
i've built sealed boxes before just never port and would like to learn, thanks for help