I have 3 jl 15w6 woofers and I'm trying to build a box to fit my 94 s-10. I have 53 in. To work with across and about 18 in depth.. I was thinking I'm building a box 51x22x16 ported. I want to tune the box to 30-32hz and make each sub have its on cell and round port.. But
I don't know how big the port needs to be to get 30-32hz.. Any suggestions? Or should I go with a sealed box?