what do you think ?

[psylo535 10+ year member]

http://img29.imageshack.us/my.php?image=29cubes33hz36sqin5xd.png

will this work for 2 type r 12" subs. i don't have much more room. or would i be better off with the same box and 1 sub

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[rpfuror 10+ year member]

If the only options is box that size for 1 or 2 sub I say 1. With the current design you are going to have alot of turbulance do to the area of your port.

If I where you I would have someone desing you are custom box to suite your application with one driver.

 

[PowerNaudio 10+ year member]

that enclosure meets the minimal requirements for a type r 12" sub, it will still yield good results, but a single 12" type r using about 2.5cuft at 33Hz ~35Hz will yield same or better results.

 

[psylo535 10+ year member]

well i deciced to go with just 1 12". my box will be 3 c. f. and i am using 4" aeroports. my question is do you think 1 4" port will be enough. i want to tune it around 33hz or so

 

[PowerNaudio 10+ year member]

the volume will work as well as the tuning but as far as the port area you'll need more than a single 4" port the type r can move some air, at a bare minimum of 2 4" port, but at least 3 4". to avoid port noise completely.

 

[psylo535 10+ year member]

the volume will work as well as the tuning but as far as the port area you'll need more than a single 4" port the type r can move some air, at a bare minimum of 2 4" port, but at least 3 4". to avoid port noise completely.

it says 17.60 inches for 2 4" ports. would that be total or 17.60 each ?

 

[PowerNaudio 10+ year member]

the area of a circle can be calculated using this equation,

A=3.14 x r x r

r= radius

a= area of port in cubic inches

so for a single 4" port the area is: 12.56cuin

for your application i would use a minimum of 2 4" ports which would give you an area of 25.1cuin.

now if you dont want any port noise what so ever then double that number, the problem with using more ports is that the port length also increase by a great margin.

now another thing you have to take into consideration is the location of the enclosure. because if the enclosure is in a trunk vehicle then you will rarely hear the port noise in the cab, and only hear it if you open the trunk lid and stand there while its blasting away.

so you can get away by using dual ports instead of 3 or 4 and not worry about the port noise even if its present, for the single fact that you wont hear it.

 

[psylo535 10+ year member]

the area of a circle can be calculated using this equation,A=3.14 x r x r

r= radius

a= area of port in cubic inches

so for a single 4" port the area is: 12.56cuin

for your application i would use a minimum of 2 4" ports which would give you an area of 25.1cuin.

now if you dont want any port noise what so ever then double that number, the problem with using more ports is that the port length also increase by a great margin.

now another thing you have to take into consideration is the location of the enclosure. because if the enclosure is in a trunk vehicle then you will rarely hear the port noise in the cab, and only hear it if you open the trunk lid and stand there while its blasting away.

so you can get away by using dual ports instead of 3 or 4 and not worry about the port noise even if its present, for the single fact that you wont hear it.

thanks for the reply.the enclosure is going in a ford ranger.the only way to us e to ports at that lenght is to bend the port. i have the sub downfiring on the drivers side and the port on the passenger side firing foward