1. ## Re: review and correct my porting tutorial please

post # 28?

im not too sure on those two things you were talkin about...

Originally Posted by NjccBflo
Explain about measureing through turns (L & "Labyrinth" Ports grow long very fast because of this). What about Pi*R^2?

On your box diagram you didn't account for the (3/4"?) width of Port Board 1 when you 'measured' "Y." -and- It looks like "X" only measure to the interior of the baffle. It should measure right to the atmosphere (outside).
mind explaining those?

2. ## Re: review and correct my porting tutorial please

I am not the greatest at explaining things, so I will try to be brief. While reading you wrote the the port opening (mouth) should be half the area of the sub. Though it looked more like you meant the over all port volume in the pics and then more or less backed that idea as you continued your tutorial. I think some rewording may make it easier especially for a noobie. In my designs and even some of the MFG specs the port mouth has been close to 1/3 of the overall surface area of the sub which leaves the port several inches longer than the sub and keeps the air pressure low enough not to need worrying over port noise caused by too small of a port..

I hope that said what I mean since I have barely finished a cup of coffee this morning.

Mike

3. ## Re: review and correct my porting tutorial please

thanks, ill edit that part too.

i know that it *can* be smaller than 1\2 of the area and still have no port noise, espically when the power is lower - say 200~500w and the air isnt flowing thru real hard.

ill put it in there and explain why you want a bigger port if possible, but if not, it can be smaller.

should i say that the port should always be around a ratio of 8:1 as well?

4. ## Re: review and correct my porting tutorial please

the best way to see where your tutorial neeeds improvement is to have someone inexperienced with box building and design try it.

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