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View Full Version : SEALED box help (3 10w7s)



c0ke
05-12-2010, 02:22 PM
i need help with specs on a sealed box for three 10w7s

each speaker will need its own chamber but i need sealed- no ported ( i like frequency response ) lol

going in the trunk of a 97 grand prix

d-REW
05-12-2010, 02:26 PM
1.25 per sub

c0ke
05-12-2010, 02:40 PM
and what dimensions would i need to get 1.25 per sub

i dont know how to do the measurements..never done it before

Wildbillpb
05-12-2010, 09:59 PM
You need to measure the maximum dimensions of your trunk or the dimensions you would like. Then see what you get out of those if it's enough or more than enough you just subtract one of the sides till it gives you 1.25 cubes ea. Since you will have 2 spacers subtract 3.0" (using 3/4 mdf) from the length(width if you will), 1.5" from the depth, and another 1.5" from the height. After you subtract those from your measurements multiply your measurements together L*W*H then take that measurement and divide it by 1728 that how many net cubic feet you have. If you have more than 3.75 cuft then you need to subtract a side until you are down to 3.75 cuft then add 3.0" to the length, 1.5" to depth and 1.5" to the height and that's your boxs outer dimensions. You just need to place the walls so that each sub has an even 1.25 cuft to itself.

michaellane
05-12-2010, 10:01 PM
why wud iu give each its own chamber??? i mean you dont honestly need to

c0ke
05-12-2010, 11:08 PM
just what i was told to do..so i dont need individual chambers?

d-REW
05-12-2010, 11:14 PM
i can make you a design if you like personally id just do 1 common chamber but if you like 3 seperate i can make a design that way. just need your max dimentions width height and depth

Wildbillpb
05-12-2010, 11:34 PM
3 seperate chambers so if one sub burns up the other two won't or so I'm told either way it's only 2 more pieces of wood

on1wheel01
05-13-2010, 12:25 AM
Whoever told you that is a moron. I predict box fail. If a sub burns up then something has really gone wrong. I mean it's jl so there is some fail involved but really. Build it right set the amp correctly watch the volume and gains, and you should be good.

Wildbillpb
05-13-2010, 02:08 AM
I heard that in a sealed box if you fry one sub it would damage the other unless seperated. Sounds like it could happen if a sub starts smoking it has no where to go.

fasfocus00
05-13-2010, 07:17 AM
I heard that in a sealed box if you fry one sub it would damage the other unless seperated. Sounds like it could happen if a sub starts smoking it has no where to go.

this is true in any common chamber setup, the enclosure become too big for the remaining subs causing stress and potential failure to the remaining subs. if you have 3 subs in a sealed enclosure of say 4 cubes (1.33 cubes each) and the max for each is 1.8 cubes. if one blows or freezes or whatever, the other 2 will be working in the same enclosure with now 2 cubes each which is larger than the max recommended. same goes for a ported enclosure. it's really a preference thing b/c if the gains and settings are set properly and the box is sealed properly than it really wont make a difference. there is more detail that goes into this, I just don't feel like typing it all.

Fuknmovin
05-13-2010, 10:17 AM
Ditto.....

DNick454
05-13-2010, 08:27 PM
Sell one W7, and pocket the cash. With the remaining two, build a ported enclosure, and assuming you have a quality amplifier to give those things the power they need, it should be as loud as, if not louder, than the 3 sealed, and it would play stupid low based on your box's tuning frequency.

mossberg385t
05-13-2010, 08:38 PM
why would you buy w7s for a sealed box? theyre designed to get loud not be musical

Wildbillpb
05-13-2010, 09:12 PM
why would you buy w7s for a sealed box? theyre designed to get loud not be musical

SQ is what they are designed for. They don't get THAT loud.

c0ke
05-14-2010, 04:05 AM
how are they not designed to be musical? you kidding me?

supermaxx123
05-14-2010, 04:09 AM
a w7 in ported is not sq, sealed yes it has a chance.

AudioDave
05-16-2010, 04:33 AM
why would you buy w7s for a sealed box? theyre designed to get loud not be musical

BS thats a statment by someone who cant afford them or never heard them in a system worth a ****.

AudioDave
05-16-2010, 04:38 AM
a w7 in ported is not sq, sealed yes it has a chance.

BS go here page 13

http://mobile.jlaudio.com/pdfs/594.pdf

Theres your box designs. I am doing ported and I guarantee it will do fine in SQ

bugflipper
05-16-2010, 05:57 AM
For sq if you port, go low. Most stay under 35hz. The lower you tune it the less boomy the subs. My latest setup is 2 10 w7 @ 500 rms 1.6 cubes slot ported to 26 hz. A full rms load would yield 145-146 depending on efficiency of electrical components. 3 sealed would do the same number provided sub rms was fulfilled. A well designed ported box will sound almost as good as a well designed sealed. But the sealed will always be a hair better. Proper mixing with an eq can correct the tuned frequency for flat response and make the ported sound as well though.For ported you need someone to build with a lot of experience to do it right. Almost any monkey can slap together a sealed box with guidance. So definately get a member with experience to build and request a video or be there in person so you can learn. Because box design is as important as sub choice in sq.

AudioDave
05-16-2010, 06:01 AM
lol just go to the site above.

bugflipper
05-16-2010, 06:14 AM
For sq if you port, go low. Most stay under 35hz. The lower you tune it the less boomy the subs. My latest setup is 2 10 w7 @ 500 rms 1.6 cubes slot ported to 26 hz. A full rms load would yield 145-146 depending on efficiency of electrical components. 3 sealed would do the same number provided sub rms was fulfilled. A well designed ported box will sound almost as good as a well designed sealed. But the sealed will always be a hair better. Proper mixing with an eq can correct the tuned frequency for flat response and make the ported sound as well though.For ported you need someone to build with a lot of experience to do it right. Almost any monkey can slap together a sealed box with guidance. So definately get a member with experience to build and request a video or be there in person so you can learn. Because box design is as important as sub choice in sq.

AudioDave
05-16-2010, 07:02 AM
double post 20 mins later? lol

bugflipper
05-16-2010, 07:11 AM
That's a slow double click. lol Cell phonage issues.