Bent Port Displacement

[Shiraz]

Hi everyone, just have a question here , how do you calculate displacement of a bent port with a single 90 degree bend around 4" diameter X 26 inch long, enclosure wood thickness of .75 inch MDF . Port will be mounted on same side as the Woofer. Any help on this would be great.Thanks . Also any side effects on using a bent port with commonly available PVC elbow

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[wesl56 10+ year member]

may be some mathematical formula, but since i **** *** at math, i would just use water... since its pvc, no problems

never used pvc ports myself but i have seen them with those curved 90s... not the sharp 90, but the rounded one ya know

 

[helotaxi 5,000+ posts]

Treat the bend as the same length of straight pipe when figuring volume as you did when figuring lenght for tuning purposes. The difference between the actual volume and the volume of the equiv. length of straight pipe is negligible.