ravendarat
10+ year member
CarAudio.com Elite
Im starting my build tomorrow for my spl van and am having some issues figuring out my ports. The ports will be slots, they need to be no bigger than 3 by 24 inches. The sweet spot in the vehicle looks like its in the area of 55-60 hz. When I was trying to plug these numbers into my equation it was giving me results that basiclly ment it was impossible to do. The box volume is 4 cubic feet. Any help here would be appreciated guys. all Im looking for is the port length needed