round port, slot port ?

[Notorious97200 339]

I have read a lot on the subject, but I can't get a final answer.

Like a lot of people in my country (we have small cars), I have limited space in my trunk, but still want to use a ported box.

I've read that round ports can make me save space. But I don't understand how. The same rules should apply : 12-16 sq inch of port area per ch ft.

What can I expect for a 3.5 cu ft box ? I would like to make a smaller box so that my amps can breathe

Thanks

[Adrian_D 520]

Actual port wall displacement is smaller with round ports compared to slot ports but it will depend on the application.

Using a flared round port / aeroport is going to help decrease port air velocity, meaning you can use less port area than when using a slot port.

[Notorious97200 339]

Ok

I got it !

But what is the rule ? I can use less port area, but how much less ?

And How to choose from 1 port, 2 ports,...?

Maybe someone can post a link where I can find all the info I need.

Thanks Adrian

[BKOLFO4 29]

How much port area you need will depend on:

Driver size/parameters

How much power you will run

Tuning frequency

Type of port used

Notice I did not say anything about using box volume to determine port area

If you want the true required port area for the port to function 100% as it should, you can use this:

PORT Size Calculations and Formulas for WOOFER and Subwoofer BOXES

But I will warn you, it will ask for a big port. You can get away with less in a car, and even less if you use a flared port. . .

Is this for the Xcon 15 and SAZ1500 mentioned in you signature?

Brian

[Notorious on mobile 0]

How much port area you need will depend on:

Driver size/parameters

How much power you will run

Tuning frequency

Type of port used

Notice I did not say anything about using box volume to determine port area

If you want the true required port area for the port to function 100% as it should, you can use this:

PORT Size Calculations and Formulas for WOOFER and Subwoofer BOXES

But I will warn you, it will ask for a big port. You can get away with less in a car, and even less if you use a flared port. . .

Is this for the Xcon 15 and SAZ1500 mentioned in you signature?

Brian

Yes it is, Sir.

I would like to try a box with aeroport, if it can be smaller than my actual one : 3.5 ft3 net @ 32 hz.

In my country, people are afraid of big box in their small trunk !

(This is still me, it's my mobile account)

Edited April 23, 2010 by Notorious from Martinique