View Full Version : Calculating 2 ports...?

09-13-2003, 06:11 PM
I'm building a 214L vented box with a 15" tempest ( http://www.adireaudio.com/Files/TempestTechSummary.PDF )

I have 3" dual flared ports ready to be cut but I can't figure out how to calculate the lenght for 2 ports. I want to tune it to 15.4 hz. Thanks for the help.

09-14-2003, 10:28 AM
When using more than one port, divide your box volume by the number of ports you want to use in the formula.