PVC Pipe speaker ideas

chipco3434 · 5th January 2007, 07:55 PM

My Sea Scouts do a project every winter. This year I helped them to decide on a small desktop Ipod/CDP. Source connected to via 3mm RCA to LM4752 and then using some NSB speakers.

It's my idea to mount these speakers on a flange-->90 elbow-->straight section-->elbow-->flange. This would form sort of a U with the speakers mounted at both ends of the U on the flanges. What sort of internal volume should I aim at for PVC tubes. Should the tubes be damped/stuffed? That's the sort of things I would like help with.

Thanks!

joe carrow · 5th January 2007, 10:20 PM

Pipes can make great speakers- they have very rigid walls.

The internal volume should be similar to what you'd expect from modeling a sealed box in something like WinISD. If you don't have/can't measure T/S parameters, then just make sure the pipe diameter is at least as large as the diameter of the woofer.

Stuff liberally with poly fibers to kill tube resonance.

Make the pipe as long as you can, and keep experimenting with smaller pipes to see how small you can make it before it sounds bad/different, then make the design just a bit bigger than that.

Make sure there's a divider to keep the enclosures for the two speakers airtight and separate from each other.

Also, I should tell you that those NSB's sound surprisingly good in an open baffle. I made one just with cardboard, and it was an illuminating experience. There was absolutely no bass, but you're not going to get much bass from them no matter what you do.

ikymagoo · 28th May 2009, 08:57 PM

check them out, http://ikymagoo.deviantart.com/art/i...ipes-121598345

dheming · 29th May 2009, 12:27 AM

Tang Band driver in 4" PVC pipe: http://www.head-fi.org/forums/f6/che...82/index2.html

planet10 · 29th May 2009, 04:09 AM

Some more PVC jobbies:

http://t-linespeakers.org/FALL/toobz/index.html

http://t-linespeakers.org/projects/sampson/index.html

dave

nebojsa · 29th May 2009, 05:36 AM

I ran into some interesting designs, take a look

http://www.youtube.com/watch?v=D5y3q...e=channel_page

http://www.youtube.com/watch?v=aMJOR...e=channel_page

http://www.youtube.com/watch?v=8u1ft...e=channel_page

http://www.youtube.com/watch?v=ouGvL...e=channel_page

click on the owner of these videos and there are a lot more of them, quite interesting. Downside, its all in Japanese.

5th January 2007, 07:55 PM	#1
chipco3434 diyAudio Member Join Date: Feb 2004 Location: Racine, Wisconsin	PVC Pipe speaker ideas My Sea Scouts do a project every winter. This year I helped them to decide on a small desktop Ipod/CDP. Source connected to via 3mm RCA to LM4752 and then using some NSB speakers. It's my idea to mount these speakers on a flange-->90 elbow-->straight section-->elbow-->flange. This would form sort of a U with the speakers mounted at both ends of the U on the flanges. What sort of internal volume should I aim at for PVC tubes. Should the tubes be damped/stuffed? That's the sort of things I would like help with. Thanks!

28th May 2009, 08:57 PM	#3
ikymagoo diyAudio Member Join Date: Apr 2009	my PVC pipes check them out, http://ikymagoo.deviantart.com/art/i...ipes-121598345

29th May 2009, 04:09 AM	#5
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Some more PVC jobbies: http://t-linespeakers.org/FALL/toobz/index.html http://t-linespeakers.org/projects/sampson/index.html dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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5th January 2007, 10:20 PM	#2
joe carrow diyAudio Member Join Date: May 2004 Location: San Francisco	Pipes can make great speakers- they have very rigid walls. The internal volume should be similar to what you'd expect from modeling a sealed box in something like WinISD. If you don't have/can't measure T/S parameters, then just make sure the pipe diameter is at least as large as the diameter of the woofer. Stuff liberally with poly fibers to kill tube resonance. Make the pipe as long as you can, and keep experimenting with smaller pipes to see how small you can make it before it sounds bad/different, then make the design just a bit bigger than that. Make sure there's a divider to keep the enclosures for the two speakers airtight and separate from each other. Also, I should tell you that those NSB's sound surprisingly good in an open baffle. I made one just with cardboard, and it was an illuminating experience. There was absolutely no bass, but you're not going to get much bass from them no matter what you do.

29th May 2009, 12:27 AM	#4
dheming diyAudio Member Join Date: Jul 2006 Location: Bay Area, CA	Tang Band driver in 4" PVC pipe: http://www.head-fi.org/forums/f6/che...82/index2.html

29th May 2009, 05:36 AM	#6
nebojsa diyAudio Member Join Date: Feb 2007 Location: seattle wa	I ran into some interesting designs, take a look http://www.youtube.com/watch?v=D5y3q...e=channel_page http://www.youtube.com/watch?v=aMJOR...e=channel_page http://www.youtube.com/watch?v=8u1ft...e=channel_page http://www.youtube.com/watch?v=ouGvL...e=channel_page click on the owner of these videos and there are a lot more of them, quite interesting. Downside, its all in Japanese.

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