hemi4me?
BEAVER.989
10+ year member
CarAudio.com Elite
It sounds like you've already given the dimensions... 40x12x8?
Luckily for you, this works out perfectly at 1.52cft. (.75 per sub)
Luckily for you, this works out perfectly at 1.52cft. (.75 per sub)
OP
hemi4me?
10+ year member
Senior VIP Member
- Thread Starter
- #3
LOL thats funny! Unfortunately that is the external measurement - is that what is measured for making a sealed box? I assum that would have to be the iniside diameter? The hardest part is the 12" because that is the very max it could be.
Should I forge about the IB and for sure try the sealed box? Should these be in seperate chambers?
Should I forge about the IB and for sure try the sealed box? Should these be in seperate chambers?
req
5,000+ posts
am a mod.
so you need to make about a 1.5 cubic foot sealed enclosure that hangs from your rear deck.
by the way, i will be following information as listed here;
http://www.imagedynamicsusa.com/pdf/ID10%20D2%20v3.pdf
personally, it would be extremely simple to make this had it been my install. and just FYI, most audiophiles will agree that IB tends to be geared more toward sound quality than a sealed box, but it is harder to integrate in a vehicle. with that being said, lets pull out some formulas.
LxWxH
L=length
W=width
H=height
x=multiply
so we will use inches, because we are in america, and we are stupid. remember, our final number is in cubic feet - so we will have to do some voodoo math to come up with a final calculation in that form of units.
you have two 10" drivers that aa few inches deep. if we went with a box that, say is 11 inches internally, by 35 inches internally, and say, 10 inches deep internally. so far these are just numbers i am making up to get a starting point for what kind of space you have to work with. the enclosure is also 10" deep because the id10 is 9.125" deep - shall we continue? we would have a formula like this ;
35x11x10=3850
this is all well and good. you have 3850 cubic inches of internal volume, minus the displacement of two id10's wich happens to be .1 cubic foot.
so to find the cubic footage, we will divide 3850 by the magic number. the magic number is 1728. i found this magic number because one cubic foot = 12^3, that means, 12"x12"x12". so, we have this;
3850/1728=2.2280092592592592592592592592593
so you have 2.23 cubic feet of possible enclosure with a box that is smaller than the largest possible dimensions of your rear deck. so now you need to cut the size of the driver to that number. since you are using small drivers, we will say you have 2.1 cubic feet of enclosure space.
so you play around with the numbers a few times, do some more voodoo math, and come up with an idea. since you can not change the height and the depth of the enclosure due to the size of the speaker, you must change the width. so we will knock off a few inches to see if we can get your enclosure down to about 1.6 cubic feet (to account for the .1cf driver displacement) - mind you - this is not rocket science. if you can not get it perfect, dont worry, a few extra cubic inches internally will not destroy the universe.
just get it to about 1.6 give or take a few. you will be fine.
so;
27x11x10=2750/1728=1.59
perfect. so your internal dimensions are as follows;
27" long (C pillar to C pillar)
11" wide (glass to seat)
10" deep (rear deck to trunk floor)
awesome. 1.59 cubes. so now you have to figure out what kind of cuts you need to make. well this is some voodoomath that you will get used to. i usually cut my sides of the enclosure, to the exact internal dimensions and let the other sides overlap. so- you will be using 3\4" MDF - aka .75" MDF. do NOT FORGET to add an overlap to BOTH sides. as such.
top + bottom will be the same size. since we are looking at 11x27, we need to overlap the other pieces. so we need to add .75 for EACH side we overlap.
top piece = 12.5x28.5
bottom piece = 12.5x28.5
left side = 10x11
right side = 10x11
front = 10x28.5
back = 10x28.5
these are what you need to cut in order to make a 1.6 cubic foot enclosure. make sure you account for the blade thickness of the saw you will be using. make sure the edges are true 90 degree cuts. use a ruler - or a T square if you can. pre-drill the screw holes, and use tightbond II or III along with coarse drywall screws every 6~8 inches apart to hold it together. 90 degree clamps work well also.
after you build it - and are sure its going to fit - because i dont know what kind of obstacles you have in your rear deck - make sure you think about that before you build this, all you have to do is cut matching holes in the rear deck and your baffle and use some big fat bolts to secure the box to the rear deck. i would also counter sink the speaker into the box with either a router or another piece of MDF cut to 28.5x12.5 with holes the size of the outer diamater 10.125" of the speaker. also you might want to think about some sort of foam or rubber layer between the box and the rear deck to stifle any rattles it might cause. good luck and take pictures!
hope that helps.
req.
by the way, i will be following information as listed here;
http://www.imagedynamicsusa.com/pdf/ID10%20D2%20v3.pdf
personally, it would be extremely simple to make this had it been my install. and just FYI, most audiophiles will agree that IB tends to be geared more toward sound quality than a sealed box, but it is harder to integrate in a vehicle. with that being said, lets pull out some formulas.
LxWxH
L=length
W=width
H=height
x=multiply
so we will use inches, because we are in america, and we are stupid. remember, our final number is in cubic feet - so we will have to do some voodoo math to come up with a final calculation in that form of units.
you have two 10" drivers that aa few inches deep. if we went with a box that, say is 11 inches internally, by 35 inches internally, and say, 10 inches deep internally. so far these are just numbers i am making up to get a starting point for what kind of space you have to work with. the enclosure is also 10" deep because the id10 is 9.125" deep - shall we continue? we would have a formula like this ;
35x11x10=3850
this is all well and good. you have 3850 cubic inches of internal volume, minus the displacement of two id10's wich happens to be .1 cubic foot.
so to find the cubic footage, we will divide 3850 by the magic number. the magic number is 1728. i found this magic number because one cubic foot = 12^3, that means, 12"x12"x12". so, we have this;
3850/1728=2.2280092592592592592592592592593
so you have 2.23 cubic feet of possible enclosure with a box that is smaller than the largest possible dimensions of your rear deck. so now you need to cut the size of the driver to that number. since you are using small drivers, we will say you have 2.1 cubic feet of enclosure space.
so you play around with the numbers a few times, do some more voodoo math, and come up with an idea. since you can not change the height and the depth of the enclosure due to the size of the speaker, you must change the width. so we will knock off a few inches to see if we can get your enclosure down to about 1.6 cubic feet (to account for the .1cf driver displacement) - mind you - this is not rocket science. if you can not get it perfect, dont worry, a few extra cubic inches internally will not destroy the universe.
just get it to about 1.6 give or take a few. you will be fine.
so;
27x11x10=2750/1728=1.59
perfect. so your internal dimensions are as follows;
27" long (C pillar to C pillar)
11" wide (glass to seat)
10" deep (rear deck to trunk floor)
awesome. 1.59 cubes. so now you have to figure out what kind of cuts you need to make. well this is some voodoomath that you will get used to. i usually cut my sides of the enclosure, to the exact internal dimensions and let the other sides overlap. so- you will be using 3\4" MDF - aka .75" MDF. do NOT FORGET to add an overlap to BOTH sides. as such.
top + bottom will be the same size. since we are looking at 11x27, we need to overlap the other pieces. so we need to add .75 for EACH side we overlap.
top piece = 12.5x28.5
bottom piece = 12.5x28.5
left side = 10x11
right side = 10x11
front = 10x28.5
back = 10x28.5
these are what you need to cut in order to make a 1.6 cubic foot enclosure. make sure you account for the blade thickness of the saw you will be using. make sure the edges are true 90 degree cuts. use a ruler - or a T square if you can. pre-drill the screw holes, and use tightbond II or III along with coarse drywall screws every 6~8 inches apart to hold it together. 90 degree clamps work well also.
after you build it - and are sure its going to fit - because i dont know what kind of obstacles you have in your rear deck - make sure you think about that before you build this, all you have to do is cut matching holes in the rear deck and your baffle and use some big fat bolts to secure the box to the rear deck. i would also counter sink the speaker into the box with either a router or another piece of MDF cut to 28.5x12.5 with holes the size of the outer diamater 10.125" of the speaker. also you might want to think about some sort of foam or rubber layer between the box and the rear deck to stifle any rattles it might cause. good luck and take pictures!
hope that helps.
req.
req
5,000+ posts
am a mod.
you sir are a complete idiot.
40x12x8 = 3840
3840\1728 = 2.22
2.22 \ 2 = 1.1
1.1 + .5 (for speaker displacement) = 1.15
so 1.15 cubic feet for each driver. i think that is way far off of his original plan of .75 per driver. dont you?
BEAVER.989
10+ year member
CarAudio.com Elite
You, Sir are a complete idiot...
38.5x10.5x6.5=2627.625
2627.625/1728=1.5206163
1.5206163/2=.76
Touche.
BEAVER.989
10+ year member
CarAudio.com Elite
You forgot to subtract the 1.5" from each measurement needed when calculating 3/4" mdf.
BTW Image Dynamics listes GROSS requirements for their enclosures... so you DO NOT have to take displacement into considerstion, either.
BTW Image Dynamics listes GROSS requirements for their enclosures... so you DO NOT have to take displacement into considerstion, either.
req
5,000+ posts
am a mod.
he said he wanted .75 for each speaker.
i was totally going on INTERNAL dimensions, this has nothing to do with subtracting - as usable space is internal space. i did not forget to do anything. you forgot to list that you subtracted MDF displacement.
so in short, the ID10 will not even fit in the enclosure size you listed.
have a nice day.
i was totally going on INTERNAL dimensions, this has nothing to do with subtracting - as usable space is internal space. i did not forget to do anything. you forgot to list that you subtracted MDF displacement.
those dimensions you listed and information in the post yield 2.2 cubic feet period. and also, YOU forgot to take into account that the depth of the driver is 9.125" deep. on top of that, you forgot that you do NOT subtract 1.5" from each dimension. you subtract it from only overlapping sides. unless you start backwards with the outer dimensions... then you might make mistakes and end up with strange cut sizes and all sorts of other oddities.
so in short, the ID10 will not even fit in the enclosure size you listed.
have a nice day.
BEAVER.989
10+ year member
CarAudio.com Elite
Who uses external measurements, seriously? He stated the space he had available and I took that into consideration, calculated internal volume and came up with 1.52 cft. Divide that by 2 and he's where he needs to be. PERIOD.
BTW, the driver is 5.5" deep... well within his limits.
Have a nice day, yourself.
OP
hemi4me?
10+ year member
Senior VIP Member
- Thread Starter
- #12
Hey REQ how can I check out some pics of that set up in your sig?
Can you email them to me? Or are they on the site?
smartbet2@gmail.com
Can you email them to me? Or are they on the site?
smartbet2@gmail.com
Megalomaniac
5,000+ posts
Mr.SQ
http://www.diymobileaudio.com/forum/showthread.php?t=17395
edit: he now doesnt have those amps, he is using a Memphis belle amp now
Megalomaniac
5,000+ posts
Mr.SQ
na its pretty straight forward actually. just watch out how much power you feed and you should be good. more air the better in IB. just have to be sure your front wave is isolated from the back wave otherwise heavy cancellations will happen.
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