Box for four 12"s?

Gold Member

Username: Tremor1127

Fi Car Audio has got m...

Post Number: 1362
Registered: Aug-06

Posted on Tuesday, April 17, 2007 - 15:26 GMT

my friend just bought four 12" tc9, 750rms subwoofers.

im trying to design a box for him using this link below:

http://www.carstereo.com/help/Articles.cfm?id=31

the box is 16tallx40widex28deep. going for subs up, port in the middle facing back, tuned to 32 hz, all of the top is double baffle...

the total gross amount of the box is 10.37 cu ft.

the calculator says a port 13.75tallx8widex23.53deep will give that box a tuning of 32hz. that is the desired height and width i want the port, but is the length of 23.53 right for this size???

and if im using that link above, there are two parts... "Minimum Usable Vent Diameter" and "Calculate Your Vent Length" do i just need to use the "Calculate Your Vent Length" part? AND where it says "enter enclosure volume" is that the internal volume before sub and port displacement?

sorry if im being confusing...

Tremor1127

Gold Member

Username: Tremor1127

Fi Car Audio has got m...

Post Number: 1363
Registered: Aug-06

Posted on Tuesday, April 17, 2007 - 16:48 GMT

bump...

Tremor1127

Gold Member

Username: Tremor1127

Fi Car Audio has got m...

Post Number: 1364
Registered: Aug-06

Posted on Tuesday, April 17, 2007 - 17:49 GMT

with these deminsions: 16tall x 40wide x 28deep, there is an internal volume amount of 8.11 cu ft.

i came up with a port, 13.75tall x 8wide x 23.5deep for a tuning of 32hz.

but i didnt enter how many subs or what size or anything...

is that box, with that port, going to be correct tuning for four 12"s?

these subs remind me of a beefy AA assassin...

the whole top of the box is double baffle, incase anyone needs to know...

so, bump... :-)