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Nemanja
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So, got some 18s to play with.

I have a BMW compact e36, so want to make a box for SPL comp.

I got one with 300L - 10.5cuft

What do you guys think about that?
Should I build bigger or smaller?
Peak to hit is 50-52Hz!

So I thought about 12" aero with this box, and making the box a lot smaller, to some 6.5-7cuft and adding 10" aero

Subs up/port up and subs up/port back with 10+cuft
Subs up/port back 7cuft

So, anyone got any experience with this kind of "problem"?

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Hamsters
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RFKANGOO
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300 liter is good for 2x15"
so I suggest you should build it much bigger
and do you want to build a "competitive" no-wall box??
I have here pics of a bmw with 2 x 15" in a wall in no-wall (you get it [Big Grin] [Big Grin] )
2 subs on top of eachother but below windowline without cuts [Big Grin] [Big Grin]
that car was doing around 160db

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POWER IS NOTHING WITHOUT CONTROL [Smile]
michel van wijk
superstreet 1-2 no-wall
159.3 @ 66hz certified
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Nemanja
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anyone else?

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Hamsters
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18inchjeepin
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my newest box is 5.5 net for both with 2 aeros

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another 152.9+ HHR

SoundStream/XS Power
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5th place SS N/W World Finals 08 Reigonal
5th place SS N/W World Finals 09 N. America
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Ron caravan man
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Just build it as big as the car will allow,you can always downsize with kicks inside the box,bodyfiller,more wood,etc...

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Nemanja
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12cuft net good enough? +subs and port make14cuft.

is that going to work

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Hamsters
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canadian no-wall
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that should be enough, id try for 15 cuft' before displacement....make the box as wide as will fit between the b-pillars and make the port as large as you can then just shrink the box if needed. the rest is vehicle specific, dont assume your tuning will peak at a certain note though....you may be in for a surprise!!

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Nemanja
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i think a 15cuft will be all my car can handle that is absolute maximum, will try to brace it as much as possible

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Hamsters
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canadian no-wall
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be careful with bracing....try to build the top and bottom 2" thick and maybe a singe heavy rod in the middle from top to bottom.......Pete s on this forum has a build log you should look at for sure!

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Nemanja
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ok, i'm doing 510L before displacment


thats about 14.5cubes NET

Port will be somewhere around 2200cm2 length will be tested...

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Hamsters
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Nemanja
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so heres a quick reply...


510L box -
Frequency range 30-50Hz, subs play constant 150 +/-0.5db... [Smile]

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Hamsters
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canadian no-wall
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what have you tried when testing?? what portlength did you end up with etc?

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