Basreflex tube cut with 45 degree angle? - diyAudio
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Old 6th August 2016, 09:25 AM   #1
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Default Basreflex tube cut with 45 degree angle?


What happens when you cut the basreflex tube at an 45 degree angle on the inside of the box?

The tube will have different lengths, how does that effect the behavior of the tube.

What about different cutting angles, how does that influence the output of the tube.

best regards


Last edited by heinz1964; 6th August 2016 at 09:25 AM. Reason: spelling
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Old 6th August 2016, 12:32 PM   #2
JMFahey is offline JMFahey  Argentina
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Location: Buenos Aires - Argentina
No big deal.

Truth is, *length* by itself is not *the* main parameter, ,itīs not an organ pipe, but airmass inside it, and no matter how you cut the end, you will still have one definite mass of air inside.

Of course, when drawing cabinet plans or even calculating tuning, itīs far more practical for the builder to specify "use a 2" diameter by 4" long tube" than "use a tube which holds 2 grams of air" or whatever but in fact tube geometry already implies that.
Design/make/service musical stuff in Buenos Aires, Argentina, since 1969.
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Old 8th August 2016, 04:09 PM   #3
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I've been doing this for a while.

One neat side effect of cutting the port tube at an angle is that it works similar to a flared port. (Because the area is greater when you cut at an angle)
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Old 8th August 2016, 08:24 PM   #4
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A tube cut at a 45 degree angle should produce an Fb that's slightly less than the same tube of the same average length cut at 90 degrees.
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