4 15inch L7s in a wall question

[Pimpdaddyq 10+ year member]

My buddy has 4 15" L7s in a blazer and decided to wall it off .. He has 24cubes before any displacement and for the port he is using just the face as the port length .. Basically no walls in the port just a big hole and says the port length only needed to be about 2inches long..

Is this right? Or what should it be? Never messed with a box this big, or a wall for that matter.. Let me know .. He wanted it tuned low but gimme some ideas?

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[JimJ 5,000+ posts]

He wanted it tuned low

Doesn't sound like it will be.

 

[WOT]

Im gonna have to say thats a definite miscalculation. Got his box specs on hand?

 

[Pimpdaddyq 10+ year member]

31 tall 37 wide and 36 deep .. Has a 5" by 29.5 port in it right now ..

 

[snoopdan 5,000+ posts]

that shit's gonna be tuned at 90 hz or something close....lol

 

[snoopdan 5,000+ posts]

that shit's gonna be tuned at 90 hz or something close....lol

as a compairson, ive got 22 cubes, the port is 32x8x30 and peaks at 36 hz

 

[Pimpdaddyq 10+ year member]

Hmm.. well is it possible to extend it and lower the frequency? Or is the port too small? Just tryin to get it figued out for him, but im not really sure what to do about it..

Thanks for the help.. LMK..

 

[jdawg 5,000+ posts]

you figure it up the same way just like any other box

 

[Pimpdaddyq 10+ year member]

Has anyone messed with it for what the port length will be for that situation? Im wondering what everyone else thinks..