Wayne Parham Messages: 18774 Registered: January 2001
Illuminati (33rd Degree)
It is different. I used to use a port like pictured in your post, one that I called a "periscope" layout. I changed the port to be bent in an "L" shape, formed with one side piece and two top pieces. It's just easier to make, in my opinion. Both tune the box to the same 37Hz Helmholtz frequency.
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