I have a couple of questions I can't seem to get a direct answer to...
I know the rule of thumb is about 15 sq.in. of port area per 1 cu.ft. of air space. How thin can the opening of the port be before issues come up? Say I have a 4.3 cu.ft. box I want to tune to 32hz. Can I have a 2"x34" port opening without any ill effects if its long enough for the correct tuning?
Also when designing a rectangle port, is there anything to take into account if the port is a labryrinth instead of a L-shape? Like the picture below...
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