porting question

[JBLnTruck 0]

i just went on car stereo.com and i have a 2 cu.ft. box and to tune it to 34hz with the sub being an icon 12 the round port would be 4" diameter and 11.72" long is this right

[AP Zoutes 0]

yeah, that's right. But I would suggest two 4" ports to lower port noise. 2x 4" ports tuned to 34 = 26.5" long

[JBLnTruck 0]

yeah, that's right. But I would suggest two 4" ports to lower port noise. 2x 4" ports tuned to 34 = 26.5" long

is 26.5"long for each tube or for both

[AP Zoutes 0]

both

[JBLnTruck 0]

both

so 2 ports 13.25" each , right?

[AP Zoutes 0]

nope 2 ports 26.5" long ea. but just go with the single port. IS 2 ft3 after displacements?

[AP Zoutes 0]

I spoke to soon....You should be OK with one 4" port. If 2ft3 doesn't include sub/port displacement then your actually around 1.7 ft3 and will need a 14.5" port to be about 34hz