Port (1 Viewer)

[Rick Thomas]

WinISD tells me to use a 4" X 17" port to tune my 130L sono

to 19hz.Is that a straight port or flared in the program? I have a 4" flared port coming from PE so if thats not calculated in WinISD how do i find out the correct length with flared port?.thanks alot

 

[Ron D Core]

The dimensions of the port flare are negligible. If the flare is huge then you would have something closer to a horn. I would just worry about the lenth of the straight tube. Maybe add a centimeter or so, but it won't make much of a difference with a port thats already 17" long.

 

[Patrick Sun]

Rule of thumb: add one inch to the end-to-end length of a flared port to arrive at the length of a "straight" port. So if the program tells you that you need a 17" long port, you'll need an 18" flared port (measured from end-to-end).

But one inch isn't going to kill your subdesign.