View Full Version : 4-4" ports

08-01-2009, 06:58 PM
making a box sunday for a buddy. he has a lot of 4" pvc. do you guys think 4 4" ports would be enough for very old kicker comp 15's? i think the box is 11 cubes with the ports 11" long for 32hz tuning.

08-01-2009, 07:06 PM
for 11 cubes that is very small...it is only 4.5 square inches of port per cube of box. Most people recommend between 14-17 square inches of port per cube.

08-01-2009, 07:14 PM
thats what i thought. he said the kicker manual has a 3.5 cube box with one 4" port for the subs that he has. that was for one 15". so he was going to use 3 i said to use at least 4 but it still seemed to small. i also have 8" sonotube around. would 2 of the sonotubes work?

08-01-2009, 08:23 PM
2 of the 8" sonotubes would be alot better than 4 4".

08-01-2009, 08:45 PM
10 square inches per cube. but the box is 11cubes? im hoping thats for 3 15s not 2. ill be using a 10" for 8cubes and yeh 2 8" would work good

08-02-2009, 12:12 AM
yeah the box is for 3 old kicker comp 15's.