Box for 4 L7s

[xpl0it 10+ year member]

I have my design finished, well almost. But I was wondering if I should go with a 1.5" baffle or since the L7s aren't that insanely massive and wouldn't expect the wood to flex much, would .75 inches be ok for my baffle. Also, the box as of now is 10.21 cubic feet after port displacement and is tuned to 37hz. I was wondering though, what is F3? It says that's 30.93hz. I'm currently using BassBox 6 Pro. Most likely, I will try to cut down in box size to get it around 8 cubic feet and possibly put some polyfill in the box to make the drivers think the box is a little bigger. The current box size is:

26"X38"X24"

Thanks a lot guys.

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[PhatTonyDeMarco 5,000+ posts]

If you dont have room, then dont do four 12's...

Yes a double baffle would be needed, there is four 12's on the same plane...

You cant handle a set up of this magnitude.

 

[vetkilr 10+ year member]

you goin sealed

 

[LeofromtheH 10+ year member]

i'd say go w/ a 1.5 baffle if they're 15's. though your right that they're not insanely massive, but i'm sure 4 of them will do som sorta flexin w/ .75

 

[PhatTonyDeMarco 5,000+ posts]

i'd say go w/ a 1.5 baffle if they're 15's. though your right that they're not insanely massive, but i'm sure 4 of them will do som sorta flexin w/ .75

Its a huge enclosure, he needs to properly brace and double the baffle. Regardless of how 'massive' the drivers are...

 

[xpl0it 10+ year member]

You don't think 10 cubes is enough room? I have the space, it's just anything over 24" tall starts taking half of my rear view mirror, lol. 8 cubes will probably be enough even in a shared chamber. What method of bracing should I look at? Thanks.

 

[PhatTonyDeMarco 5,000+ posts]

You don't think 10 cubes is enough room? I have the space, it's just anything over 24" tall starts taking half of my rear view mirror, lol. 8 cubes will probably be enough even in a shared chamber. What method of bracing should I look at? Thanks.

That is enough room, but you said you wanted to downsize and fill it with pollyfill, which is retarded.

Steel rod is very easy to work with and inexpensive, and works much better than MDF scraps when it comes to bracing..

 

[xpl0it 10+ year member]

You cant handle a set up of this magnitude.

What do you mean by that?

 

[vetkilr 10+ year member]

4 12s are nothin to play with......lol

 

[xpl0it 10+ year member]

Well 8 cubic feet is still plenty I think, I've used polyfill in home application only and works wonders. I'm open to any suggestions though. Again though, what is F3? And is 37hz ideal for what I'm lookin at (60% spl, 40% SQ). My friends box for his type R was tuned to 32 hz (12" type r, 2.5 cubic foot box) and i think that was way too low for his sub, it didn't get that loud at all, just moved his trunk basically.

 

[xpl0it 10+ year member]

Well, I sold one of my computers, xbox 360, and my old system and came up with some money and wanted to do something along the lines of 4 12s. I want a good chillin system that if I want to show it off to my friends, i can do some damage. My old setup was really fun to show off just because it was one really loud 12" that sounded really clean, but I'm looking to put people around here in disbelief. I just don't want a peaky box, I loved my old box because it could pick up anything from 26-100hz pretty **** well, which is good because I love listening to jack johnson, it gets sooo loud.

 

[PhatTonyDeMarco 5,000+ posts]

8 cubes net would be fine, but 8 cubes gross is very undersized.

 

[vetkilr 10+ year member]

2 per ported is small,but will make sound.

Since your underpowering them the bigger the box the loud they will be.Tune to 35-36.

 

[vetkilr 10+ year member]

You should do at least 2.5 per each one.

 

[xpl0it 10+ year member]

Is net after port/driver/bracing displacement? As of now I'm sticking with this 10.21 cubic foot box. 2 per ported would be worse if they were individually chambered, but since it's all one chamber, it should be better from what I've been told.