some help needed

[matrxx dude 5,000+ posts]

im going to build my 18 mt a box tommorrow,the dimensions are 16'' tall,22''deep and 41'' wide,the sub will be firing up,im wanting to do a slot port accross the back bottom 3'' tall and 41'' long,my question is i want to tune it about 32hz,wat lenghth port would be needed.thanx

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[matrxx dude 5,000+ posts]

come on guys,i know some of u know the answer.

 

[xluben 10+ year member]

you don't want a 3" x 41" port

max ratio should be 8:1 or 6:1, i can't remember

 

[mazdakid 5,000+ posts]

i thought it was 9:1, but didnt say anything cuz i think i remember seeing people wiht ports like that

 

[matrxx dude 5,000+ posts]

can somebody tell me wat they would do here with the port and length.thanx

 

[mazdakid 5,000+ posts]

do a port on the back or side, top to bottom, so 16" by whatever

 

[matrxx dude 5,000+ posts]

ok but wat length port ,like say 35hz