HELP, with outside port

[Exploder 97]

Okay, i have a question,,, I am very f-word cramped for space.. and the sub im looking at calles for a 4x13 inch round port.... and that will make it 34 hz.... can i just run a pvc pipe that is 4x13 on the outside of the box... would that be the same??? or no??? if not then can someone give me their aim and help me out.. thanks much

[OLD_SCHOOL]

yep

10chars

[LuNaTiC]

wont it change the frequency a lil? b/c theres no port displacement.

[jellyfish420]

when you do your calculations you have to figure in the displacement...if you don't figure in the displacement(because ther is none) you will be fine.