Need help building Sonotube Subwoofer - Page 2

jbell · 25th February 2009, 10:38 PM

this is for GRP (graduation research project)

I'm involved with a local high school senior doing a multitrack recording project, so I think I've got an idea of what you are doing, and that's why I've given a couple different options that you can go for.

I'm assuming you are doing:
1. demonstration (like a boombox, with the high level speaker outputs connected to the sub amp, then from the amp to the boombox speakers, turn on some music without sub, and then turn up the sub)

2. documentation, possibly like what the thx spec is, (since faculty will probably only be interested in home theater) and how this sub helps achieve it. Also, your construction costs / methods

3. defense, answering questions from faculty on construction, comparison vs. other subs you could buy, math on how to figure out how loud it can get, etc...

4. professional help/references. There are many on this board that can help out, just ask. I believe that postings/answers would qualify for documentation from experts.

again, good luck, and it's almost march... time to get busy.

auplater · 26th February 2009, 12:02 AM

For ~ $150 worth of stuff

Largest Sonosub yet!!

dave_gerecke · 27th February 2009, 06:32 PM

And here's another link with information about a Sonotube based subwoofer.

http://www.passdiy.com/pdf/el-pipe-o.pdf

Peace,

Dave

dave_gerecke · 28th February 2009, 12:30 AM

And another!

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

Peace,

Dave

woof · 13th March 2009, 12:42 AM

Being a noob to sonosubs, your budget recommendation for the NHT Foster subs got my attention. I have ordered 2 of the subs. My question is about the 18" tall sonotube that you described. Is that net height, or does that include 1 1/2" for the top and base plates?

Thanks,

jbell · 13th March 2009, 02:42 AM

18" was interior height. However, if you do 16.5" interior, it only affects the response by about a hz or so.

It should be an extremely forgiving design.

Post pics when complete.

woof · 13th March 2009, 05:52 AM

Thanks, jbell. I have a 12" mailing tube with 3/8" walls that is 53" tall. So I can easily get 2 - 19 1/2" sections. I've got a Dayton 100 watt amp that I will use initially, but I've got a Bash 300 that I may try. Jack responded in an email that these subs will take 200 watts continuous. What power did you use for your model?

Thanks, again.

26th February 2009, 12:02 AM	#12
auplater diyAudio Member Join Date: Apr 2005 Location: KyOhWVa tristate	her's one of 4 I built For ~ $150 worth of stuff Largest Sonosub yet!! __________________ "...His brain is squirming like a toad..." Jim Morrison

13th March 2009, 12:42 AM	#15
woof diyAudio Member Join Date: Feb 2007 Location: Irving, TX	Question for jbell Being a noob to sonosubs, your budget recommendation for the NHT Foster subs got my attention. I have ordered 2 of the subs. My question is about the 18" tall sonotube that you described. Is that net height, or does that include 1 1/2" for the top and base plates? Thanks,

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25th February 2009, 10:38 PM	#11
jbell diyAudio Member Join Date: Apr 2003 Location: .	this is for GRP (graduation research project) I'm involved with a local high school senior doing a multitrack recording project, so I think I've got an idea of what you are doing, and that's why I've given a couple different options that you can go for. I'm assuming you are doing: 1. demonstration (like a boombox, with the high level speaker outputs connected to the sub amp, then from the amp to the boombox speakers, turn on some music without sub, and then turn up the sub) 2. documentation, possibly like what the thx spec is, (since faculty will probably only be interested in home theater) and how this sub helps achieve it. Also, your construction costs / methods 3. defense, answering questions from faculty on construction, comparison vs. other subs you could buy, math on how to figure out how loud it can get, etc... 4. professional help/references. There are many on this board that can help out, just ask. I believe that postings/answers would qualify for documentation from experts. again, good luck, and it's almost march... time to get busy.

27th February 2009, 06:32 PM	#13
dave_gerecke diyAudio Member Join Date: Dec 2007 Location: Vermont	And here's another link with information about a Sonotube based subwoofer. http://www.passdiy.com/pdf/el-pipe-o.pdf Peace, Dave

28th February 2009, 12:30 AM	#14
dave_gerecke diyAudio Member Join Date: Dec 2007 Location: Vermont	And another! http://www.t-linespeakers.org/projects/index.html Peace, Dave

13th March 2009, 02:42 AM	#16
jbell diyAudio Member Join Date: Apr 2003 Location: .	18" was interior height. However, if you do 16.5" interior, it only affects the response by about a hz or so. It should be an extremely forgiving design. Post pics when complete.

13th March 2009, 05:52 AM	#17
woof diyAudio Member Join Date: Feb 2007 Location: Irving, TX	Thanks, jbell. I have a 12" mailing tube with 3/8" walls that is 53" tall. So I can easily get 2 - 19 1/2" sections. I've got a Dayton 100 watt amp that I will use initially, but I've got a Bash 300 that I may try. Jack responded in an email that these subs will take 200 watts continuous. What power did you use for your model? Thanks, again.

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