Originally Posted by graham
Ive got no idea how to use that information
The Height x Width of the slot should add up to > 16".
Say you have a 12" sub, you add 1.5" for top and bottom wood, that leaves 12" of height for the slot. Then you should use 1.5" min for the width, that means 12x1.5=18. That is 18 square inches of port, now you use math or modelling program to figure enclosure size, and port length for that port area and desired tuning.
WinISD will work but won't calc the displacement of the port.
BBP will calc the displacement but you need to get creative with the dimensions of port material to account for a slot.
Torres will account for displacement but you can't model the response. I believe the CT app will do similar to Torres.
The 12volt and CA IIRC have port calcs too.
Pick your poison, and play around.
Somebody here can look over the design and you are ready to break out the jig/circular/table saw.
Did I make it sound easy? Maybe not, but the satisfaction, it'll make your month.
PS = you can get away with less port area with PVC, plus it displaces less so enclosure can be smaller.
Where the Governor is on a steak, the cops are on the take, and the welcoming committee is a sawed-off shotgun!