View Full Version : what size to build port

09-21-2003, 12:31 PM
my box is going to be
L 35 x H 14 x D 13
i want to port it at 32 Hz
what size do i build the port??
will be a slot port

sub = SI Magnum
amp = Orion Xtr Pro 2400
1200 rms @ 4 ohms

09-21-2003, 11:47 PM
http://www.diysubwoofers.org/portcal.htm is the formula you need, just plug everything in and figure out your port size.