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Design slot port

There are some good diagrams of slot port arrangements at diyAudio You can help to improve this site - use the feature request page to suggest changes to content or navigation.
Then under square vent, type in the height and width of the port you wish to use.
Port Length, calculator, this calculator will determine what length port to use in your ported enclosure.One solution is to take a length of PVC pipe and split it lengthwise into quarters.These segments can then be let into the enclosure to form a rectangular flare.For a circle, I get pi r squared/ 2pi r 1/2 for a square, I get r squared / 4 r 1/4.The normal method of flaring a slot port is to use a rollover bit in the router to run all the way around the port opening.S elect whether you are using a round or slotted port for you box design.There is a discussion comparing round ports vs slot ports at avsforum where Mark Seaton suggests a 3:1 ratio If using a slot port as part of the enclosure wall, the port appears longer.
Not quite as neat, but effective just the same.
I'm only guessing, but I would say that modelling the flare casino pa internet belgique radius as 20 smaller should be reasonable.
Perhaps slot aspect ratio doesn't matter until the slot gets so narrow it starts to show some resistance effects.
Even slot ports should be flared.
The corners would be mitred at 45 degrees.
JL Audio has some notes on end correction for slot ports.
For a slot, I get N 2N2 where N is the aspect ratio for N 1, 2, 3,.In this example, you would need two pipe sizes.He also suggests that flares for slot ports can be done quite easily with an angle grinder and some sandpaper.I get:.25,.33,.375,.4 heading towards.5 as an asymptote.This would give the same shape flare that would be achieved with a router and an impossibly huge rollover bit.This would be highly non-linear, no doubt.It would improve the performance of the corners, although they would never be as good as a circular port. Last update to this page 16th May 2009.After being split and heated, PVC is quite amenable to being wrapped over a suitable former to whatever radius you need.Source material, outside diameter (mm model flare radius.(mm) 2 inch sewer pipe mm downpipe 90 36 4 inch sewer pipe inch sewer pipe 160 64, segments of pipe can also be used to smooth any turns inside a slot port.This is another way of saying cross-sectional area to surface area.Smoothly flared corners could be made using a heated sheet of PVC pressed between male and female molds.Even less work is involved if you use half segments, as shown in this photo.