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Old 19th June 2017, 05:51 AM   #1
scott68 is offline scott68  United States
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Default how to fit a port into a sphere (globe)

I'm taking a break from my main speaker project and making a lamp speaker out of a 6" acrylic lamp globe using a 3" speaker. The speaker globe fits on a short 6" pvc cyl that houses the electronics. Above the globe is a LED unit.

I could use one of several passive radiators I have but I thought I would try a 1" x 9" port first I need to know if this will work: PVC pipe = Think of a the letter T inside the globe, where the bottom of the T is flared on the edge of the globe and the length inside the globe is 4 inches. At the top of the T, is a coupling with two slightly bent (using heat gun) 2.75 inch bent pvc pipes. Basically, I'm asking if making a T will count in total, the length of about 9 inches.

I could make a 180 degree loop bending the pipe, heating sand inside the pipe to make the bend keep the 1" ID but more work - would it sound that much better?
Or any other suggestions
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Old 19th June 2017, 06:12 AM   #2
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Join Date: Dec 2002
Location: Calgary, Alberta
Well, if you have worked out that 1x9 is needed for proper tuning, then no a T of 9" length open on all 3 ends won't work.
Is this enclosure opaque? If so, you can make a 1x9 port out of plumbing and make just about any shape you need with standard fittings.
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts. Bertrand Russell
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