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Help with Bass port calculations on speaker build
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TheGiantHogweed View Drop Down
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Joined: 03 October 2020
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Points: 39 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TheGiantHogweed Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2025 at 9:19am
Originally posted by fudge22 fudge22 wrote:

Generally it is not best practice to have similar dimensions for height/width/depth. The reasoning is that any cross resonances will occur at the same frequency, making them more audible.


I will keep them like my original design then, being wider than deep.

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The link didn’t work for me, but the difference between a 68mm and a 66mm port will be negligible, especially if its length is adjustable. For a round port, I just use the closest pipe size to what I calculate and adjust the length accordingly. I usually cut the baffle hole with a router, with the pipe fit from the back and front hole flush with the inner diameter. If finish is not so important (behind a grille) I just router or laser cut a hole and fit the pipe flush with the front baffle. I guess a flange covers up a less than perfect cut-out, but it is not necessary acoustically.


CPC is very fussy about what browser you use. I liked this port design as it has screw holes to mount it. I think I plan to add a grill at a later stage. I hope I got the quoting right. This forum seems different to others I use regardign the quoting format.
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