View Full Version : what design would be more efficient?

04-18-2007, 04:49 PM
3" port across the whole bottom (37")

http://img265.imageshack.us/img265/9757/box1bm9.jpg (http://imageshack.us)

or a 5" port thats 19" in the middle of the box.

http://img265.imageshack.us/img265/890/box2yk8.jpg (http://imageshack.us)

sorry for the really bad pics.

04-18-2007, 06:20 PM

04-18-2007, 07:09 PM
He's asking if there is any different between a port that is incredibly wide, but not very tall, versus a port that is much more squared

04-19-2007, 02:56 AM
with out knowing any more information other then the one you have provided. the most efficient port is the more squarish port. the best port is a port that stays with in a 1 to 1 ratio of width to height or round. since it provides the lest amount of surface resistance area within the port.

04-19-2007, 11:10 AM
1:1 is best, 8:1 is acceptable. Any farther than that and the wall resistance messes up the tuning.

What are you tuning to and do you have any idea how long that port will be?

04-19-2007, 02:15 PM
thanks guys, i just didnt know if the 5" port in the middle would cause air flow issues.