Between a slot port and a round port.

 

a round port is round

 

I knew that was coming but I figured I'd get one real response first

 

how much more real do you want it? Yuli is the smartest fellow on this here site. He speaks the truth.

 

yeah thats really all there is to it.. now if you were to ask whats the difference between an areo port (round with flared ends) and a slot port.... youd get the same answer with an 'areo ports flow better' thrown in.....

 

there is really no difference. one is not any better than the other. how's that for a real answer?

 

Works for me for a real answer

 

It's generally "easier" to do a slot port because you can go top to bottom which then acts as a brace. Round, (if you're not using an aero port) you need to find a piece of tubing and then affix it to the box.
Some like round because it's easier to do multiple ports (say one on each side of the woofer compared to one large slot port) so it "looks better".
Sound wise there is no difference.

 

A round port will have a bit less drag then a slot port with an equal cross sectional area...

probably not a concearn in most cases, but it's worth noting....

 

Thanks that does clear things up, I thought maybe the slots were better cuz I see more people using them, round seems easier to build to me.