View Full Version : port Feq

06-11-2003, 12:52 AM
Hey I built a box. I had it in my truck and had 2 lightining audio bolt 12's. Then the amp was an old amp. Hit really hard. I was stolen out of my truck a year ago becase it hit so hard. I Just got it back 3 months ago. I forgot freq the ports were turned to. Is there a webtie with an calculator that i can calculate the port freq. Or is the there a fromula

06-11-2003, 12:56 AM
theres a couple different formulas.....
go here for a port length calc.... http://www.the12volt.com/