1. ## port length and diameter is based on??

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"?

2. ## Re: port length and diameter is based on??

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

3. ## Re: port length and diameter is based on??

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.

4. ## Re: port length and diameter is based on??

Is that before or after displacements?

5. ## Re: port length and diameter is based on??

Originally Posted by ace_800
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.

6. ## Re: port length and diameter is based on??

After

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

7. ## Re: port length and diameter is based on??

Originally Posted by ace_800
After

Jacob suggests .6 @35Hz.
So what is your gross space then? After wood but before port/sub.

8. ## Re: port length and diameter is based on??

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

9. ## Re: port length and diameter is based on??

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.

10. ## Re: port length and diameter is based on??

Originally Posted by ace_800
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.

11. ## Re: port length and diameter is based on??

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

12. ## Re: port length and diameter is based on??

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.

13. ## Re: port length and diameter is based on??

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.

14. ## Re: port length and diameter is based on??

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

15. ## Re: port length and diameter is based on??

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.

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