I found a google sketch up design of a ported box for 2 sundown sa 8 for a nissan titan but compared to all other boxes ive seen the ports seems too small, the design calls for 2 port that are 2 inches wide and 8 inches long. also im not sure what the tuning frequency is, all the other mesurements seem to work just fine.
can someone take a look at the design and tell me if ports of that size works or if i need bigger ports. i included a link to download the sketch up file
https://3dwarehouse.sketchup.com/model.html?id=d96df61f5f1089a0811bbdaa1d1185cc
