port length and diameter is based on??

[ace_800 5,000+ posts]

Having the guy build my enclosure and he wants to know the port length and port Diameter. I normally just use the calculator on 12volt, but it is based on the size of the enclosure correct? Each sub is going in a .6 ^3 enclosure, so i really can't do 20" straight length port so do i need to wrap the port like a tline to get the 20"?

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[pro-rabbit 5,000+ posts]

What subs and what are the specs of the enclosure going to be?

 

[ace_800 5,000+ posts]

Subs are 2 SA8 's. Enclosure is a false floor so specs are weird. I've got about .7^3 of space per chamber mAybe a little less.

 

[pro-rabbit 5,000+ posts]

Is that before or after displacements?

 

[ahole-ic]

Subs are 2 SA8 's. Enclosure is a false floor so specs are weird. I've got about .7^3 of space per chamber mAybe a little less.

I would not port that. Run that sealed.

 

[ace_800 5,000+ posts]

After

Jacob suggests .6 @35Hz. And i hear these don't sound good sealed.

 

[pro-rabbit 5,000+ posts]

After
Jacob suggests .6 @35Hz.

So what is your gross space then? After wood but before port/sub.

 

[Kangaroux 5,000+ posts]

Well, if you do a single 4" aero it will need to be roughly 20 inches long. Ideally you would probably want 2x 3" aeros

 

[ace_800 5,000+ posts]

Its like .72 before roughly.

I can't use 3" aeros. Figure its ~8" high and ~14.5" length and width. Each sub in a separate port on the side with the amp in the middle. Dude is taking about using space under the amp for port length. I don't want to run sealed.

 

[ahole-ic]

Its like .72 before roughly.
I can't use 3" aeros. Figure its ~8" high and ~14.5" length and width. Each sub in a separate port on the side with the amp in the middle. Dude is taking about using space under the amp for port length. I don't want to run sealed.

Then you'd better just go with 1 sub. You simply don't have the volume to go ported (with sufficient volume, port area, and tuning) and run 2 subs.

 

[ace_800 5,000+ posts]

How thou when that's the suggested specs. .6 at 35 hTz and that's .72 for each sub.

 

[Kangaroux 5,000+ posts]

Unless you go very low on port area so your port length is really short it's not going to sound good. If you are too little port area it's more like having a leaky sealed box than anything.

 

[pro-rabbit 5,000+ posts]

What is suggested is to go with .7ft3 after all displacements not before. You would need 100% of the port outside the enclosure to keep the volume you have now.

 

[ace_800 5,000+ posts]

From what Jacob has said its .6 after all displacement which i should be at and i can gain room by using space below the amp

 

[pro-rabbit 5,000+ posts]

A port unless fully outside those specs will take up way to much room. If you can create an external port then yes it will work. Otherwise, no it will not.