how to tune my wall build

[aaronwhitlock3]

i am planing on building a clamshell wall with 4 15's

but im not really sure how to tune it i was wanting to tune

around 34hz or so i would upload the desing but i cant get the pic off

of google sketch up. anyone have any input on this??

the box will be 29 1/2 in. tall about 34in. long and like 38'' wide

that is a rough estamint

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