PDA

View Full Version : Square port vs. Round port



1LOWCHIEF
04-10-2008, 10:29 PM
Hey all,

This may be a noobie question, but after being out of the loop for 12+ years, I feel it's better to ask stupid questions than waste money in experimenting.

When building a ported box and the design uses a round port, I can build a slot/square port as long as the internal dimensions match, correct? Also, can this square port be divided into two (or more) ports if the collective internal volume matches?

I hope that makes sense, and thanks!

:confused:

mokedaddy
04-10-2008, 10:30 PM
yes it will be fine. Also search, there is a thread on this at least weekly :)

1LOWCHIEF
04-10-2008, 10:33 PM
Thanks for the quick reply!

And yea, I actually did search and found all kinds of random info about ports, but I'm thinking my terminology wasn't correct because I didn't find anything regarding what I was asking.

mokedaddy
04-10-2008, 10:34 PM
They are usually referred to as slot port vs round port or aero port. But yeah they are the same thing. As long as total area is the same is doesnt matter the shape.

PSturmer
04-11-2008, 12:22 AM
They are usually referred to as slot port vs round port or aero port. But yeah they are the same thing. As long as total area is the same is doesnt matter the shape.

yes it does. a round port has the best perimeter vs. area ratio.

matrxx dude
04-11-2008, 12:24 AM
aero's are way more efficent

bigbirney420
04-11-2008, 12:25 AM
round can be a more efficient, but as long as area and tuning is right it doesnt matter

benchambers80
04-11-2008, 12:28 AM
If you want SQ go with a round port because Square ports will give Square sound waves.

Not Good for SQ




If you believe that go kill yourself.

bigbirney420
04-11-2008, 12:32 AM
If you want SQ go with a round port because Square ports will give Square sound waves.

Not Good for SQ




If you believe that go kill yourself.

i dont even have a response for that

Trey803
04-11-2008, 12:33 AM
two small square ports compared to one larger one would have much more port noise

1LOWCHIEF
04-11-2008, 12:35 AM
If you want SQ go with a round port because Square ports will give Square sound waves.

Not Good for SQ




If you believe that go kill yourself.

LOL, even before I saw the 'hidden' writing I was beginning to think that this was some sort of test... square sound waves? lolz! Nice try!
:p:

1LOWCHIEF
04-11-2008, 12:37 AM
two small square ports compared to one larger one would have much more port noise

Could you define "small" a bit more? Anything less than 6 inches deep, by 2 inches high by 4 inches wide? Smaller than that?

bigbirney420
04-11-2008, 12:39 AM
In the last year I have had no less than 10 boxes that I and the DFW crew have built. I will never do another slot port EVER

benchambers80
04-11-2008, 12:40 AM
I thought port velocity was dependent on port area.

benchambers80
04-11-2008, 12:40 AM
In the last year I have had no less than 10 boxes that I and the DFW crew have built. I will never do another slot port EVER

PVC is easier to use.

king ranch
04-11-2008, 12:41 AM
In the last year I have had no less than 10 boxes that I and the DFW crew have built. I will never do another slot port EVER

why

bigbirney420
04-11-2008, 12:41 AM
I thought port velocity was dependent on port area.

Umm NO!

king ranch
04-11-2008, 12:41 AM
how do you flare the pvc and is there any difference in using pvc compared to psp ports

bigbirney420
04-11-2008, 12:41 AM
why

Not as efficient, more port noise, and bigger overall boxes

1LOWCHIEF
04-11-2008, 12:41 AM
In the last year I have had no less than 10 boxes that I and the DFW crew have built. I will never do another slot port EVER

Why is that? port noise? Tuning issues? Please enlighten me...

bigbirney420
04-11-2008, 12:42 AM
how do you flare the pvc and is there any difference in using pvc compared to psp ports

Always used PSP

bigbirney420
04-11-2008, 12:42 AM
Why is that? port noise? Tuning issues? Please enlighten me...

refer to post above

king ranch
04-11-2008, 12:45 AM
what would u recomend for 2 12's l7's for net vol and what tune and what size port and how many

consider they are on a kicker zx1500

benchambers80
04-11-2008, 12:52 AM
I always use box notes and winISD.

Kicker recommends slot ports.

Sometimes I use this. http://www.subwoofertools.com/forum/ported-box.asp

The x-mas determines the port width for that calculator.

mokedaddy
04-11-2008, 12:52 AM
yes it does. a round port has the best perimeter vs. area ratio.

Which means nothing in a daily box.


aero's are way more efficent

True I should have stated regular pvc.

king ranch
04-11-2008, 12:54 AM
I always use box notes and winISD.

Kicker recommends slot ports.

Sometimes I use this. http://www.subwoofertools.com/forum/ported-box.asp

The x-mas determines the port width for that calculator.

so you are saying aeroport wont work with this sub

i find that hard to believe

bigbirney420
04-11-2008, 12:55 AM
may be easier, but doesnt sound better

king ranch
04-11-2008, 12:57 AM
is aero louder

and that makes no sense u said aeros have less port noise and sound better

mokedaddy
04-11-2008, 12:59 AM
is aero louder

and that makes no sense u said aeros have less port noise and sound better

This will be install dependent. Also you wont use as much area for an aero port as you will a slot port.

If you have a round port box build correctly and a slot port box built correctly (note not necessarily the same port area if using areos) you will be hard pressed to hear a difference.

benchambers80
04-11-2008, 12:59 AM
so you are saying aeroport wont work with this sub

i find that hard to believe

Where Did you get that notion from?...........

king ranch
04-11-2008, 12:59 AM
well mobeious is doing my build

and bout the upp post u said kicker recomends slot

benchambers80
04-11-2008, 01:01 AM
sigh...

benchambers80
04-11-2008, 01:03 AM
Where did you get the notion that "aero port wont work" from "kicker recommends slot port".

I would say let your builder worry about the port, He probably knows what he is doing.

1LOWCHIEF
04-11-2008, 01:26 AM
Wow.... well, this thread got WAY out of hand. I'm confident I got my answer, but the discussion keeps on going and going and going and going and going...

Dingleberry
04-11-2008, 05:53 AM
how do you flare the pvc and is there any difference in using pvc compared to psp ports

For pvc, you usually flare the wood of the box itself. Something like this.

http://farrisaudio.com/sitebuildercontent/sitebuilderpictures/.pond/bandpass7.JPG.w300h225.jpg

Although you're going to have to creative in the inner side of the port.

Dingleberry
04-11-2008, 05:57 AM
here, this will help also.

http://www.subwoofer-builder.com/flares-25mm.htm

edit: +1 rep to whoever posted it.