Ported Subwoofer Build Projects
I have 4 of the SI HT 18, doing 4 single boxes and now the box vol is around 6 cuft, I can go bigger in vol if needed, box designer is saying at 6 cu ft 20hz tune is best...I was wanting a lil lower tune ( like 16 HZ) , he says its not safe? I see plenty of guys doing tunes this low , what...