aero ports for 4 re 8's

[Bender.]

im building a 2.25 cuft box for 4 re 8's. after sub displacement it will be 2 cuft...i am going to use aero ports for the first time and tune it to 35 hz. how many should i use? 2?

winisd says if i use 2 the vent length should be 21 in...does this mean 21 in each or 10.5 in each?

edit: 4 in ports

[revrider1]

What size ports?

[Bender.]

What size ports?

how did i forget that? 4 in

[bonesninja]

2 4" ports or 1 6

[Bender.]

2 4" ports or 1 6

but how long?

[bonesninja]

21.65 each for 4 inch
23.25 for the 6 inch

[Bender.]

21.65 each for 4 inch
23.25 for the 6 inch

i could easily go either way...which would be better? Thanks

[bonesninja]

i could easily go either way...which would be better? Thanks

either one

[Bender.]

either one

kk thanks