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Old 19th April 2014, 12:11 AM   #1
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Default Playing with Pringles Can : Kid's projects must sond good too !

Hi there, it's nice to came back in DIY audio hobby

There is a funny challange here. The idea is to eat some Pringles with my sons and say "Hmm.. Can we make speaker with theses cans ?"

Yeah, easy ! Just put a little 4$ 3" drive on the end... Ok but i think it will be funny only if it sound good. Like "D'uh, dad, it's sound like a true speaker!"

Ok.. My first idea was to build two way speakers with 3" TB 'subwoofer' like W3-1876S, W3-2052S and one or two Tymphany 30N18AL03. 'Subwoofer' face to the desk (with spacer to let it breath) with flexible plastic tubbing port. Two way with 2k crossover.

The second idea was to do fullrange with Dayton Audio ND65-8, ported.

The third idea was to make a stereo tube speaker like this one.

The fourth idea was to make a mini sss inspired by Elias SSS .

I like the idea of a small one piece stereo sound system for bedroom. I have two size of cans. Inside dimensions : large : 72mm diameter with 243mm heigh. small : same diameter but 118mm heigh. I got steel can of 83mm diameter and 185mm heigh.

Volume :
Big Pringles : 0.035 cu ft (1L)
Small Pringles : 0.017 cu ft (0.48L)
Milk cans : 0.035 cu ft (1L)

I can make a H shape with three can ... I look at many solutions and i begin to be lost... So i need your opinion, advice and help, please.

I'll post the Win ISD plot early about TB 'subwoofer'

Thank you all
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Old 19th April 2014, 01:09 AM   #2
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Default Plot

Plotting of the TB driver in the tall Pringles can
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File Type: jpg velocity.jpg (286.8 KB, 166 views)
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Old 19th April 2014, 03:20 AM   #3
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What about the losses ?
Most of the energy would be directly transferred and dissipated by the pringles can itself,
being it quite sound-transparent and easy to deform.
I was to suggest to try bitumen foil+felt waste. You can find it at an automotive shop.
But the whole structure needs more stiffening. The cylindrical form doesn't make it too bad, after all ...

Oh Btw
I made a pair of boxes with cylinders some months ago. They need to have a certain weight, in the end...
so any addition to limit vibrations and to absorb internal reflections is good thing.

Last edited by picowallspeaker; 19th April 2014 at 03:23 AM.
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Old 19th April 2014, 04:16 AM   #4
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Location: Pensacola, Florida
Default PVC Pipe Instead

Quote:
Originally Posted by oaristys View Post
Hi there, it's nice to came back in DIY audio hobby

There is a funny challange here. The idea is to eat some Pringles with my sons and say "Hmm.. Can we make speaker with theses cans ?"

Yeah, easy ! Just put a little 4$ 3" drive on the end... Ok but i think it will be funny only if it sound good. Like "D'uh, dad, it's sound like a true speaker!"

Ok.. My first idea was to build two way speakers with 3" TB 'subwoofer' like W3-1876S, W3-2052S and one or two Tymphany 30N18AL03. 'Subwoofer' face to the desk (with spacer to let it breath) with flexible plastic tubbing port. Two way with 2k crossover.

The second idea was to do fullrange with Dayton Audio ND65-8, ported.

The third idea was to make a stereo tube speaker like this one.

The fourth idea was to make a mini sss inspired by Elias SSS .

I like the idea of a small one piece stereo sound system for bedroom. I have two size of cans. Inside dimensions : large : 72mm diameter with 243mm heigh. small : same diameter but 118mm heigh. I got steel can of 83mm diameter and 185mm heigh.

Volume :
Big Pringles : 0.035 cu ft (1L)
Small Pringles : 0.017 cu ft (0.48L)
Milk cans : 0.035 cu ft (1L)

I can make a H shape with three can ... I look at many solutions and i begin to be lost... So i need your opinion, advice and help, please.

I'll post the Win ISD plot early about TB 'subwoofer'

Thank you all
It will require much less effort & deliver superior results.
WHG
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Old 19th April 2014, 05:56 PM   #5
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Quote:
Originally Posted by whgeiger View Post
It will require much less effort & deliver superior results.
WHG
Are you talking about the H shape stereo system ?

I see system with common volume for two stereo driver... I don't think it's a good idea. Why have they do that ?

Thanks
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Old 20th April 2014, 11:30 AM   #6
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Default Not Particularly.

Quote:
Originally Posted by oaristys View Post
Are you talking about the H shape stereo system ?

I see system with common volume for two stereo driver... I don't think it's a good idea. Why have they do that ?

Thanks

PVC pipe is just acoustically and mechanically superior enclosure material to Pringles cans. It is inexpensive and easy to join using the fittings that are available. Expansion joints make enclosure tuning an interesting project for students.

N.B. For an H enclosure, the driver interaction occurs at low frequencies only, where the signal is common to both channels. The H arrangement is only practical for near field listening venues, where right and left enclosure separation is of nominal concern.

Regards,

WHG
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Old 21st April 2014, 01:22 AM   #7
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I found a defective Logitech S125i. I will make a small H arrangement. I will use Pringles can for the kids (age 4, 6 ans 12). I already have the cans.

I will probably make an other system with good drivers, PVC and small class D amplifier later.
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Old 21st April 2014, 01:33 AM   #8
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Quote:
Originally Posted by whgeiger View Post
N.B. For an H enclosure, the driver interaction occurs at low frequencies only, where the signal is common to both channels. The H arrangement is only practical for near field listening venues, where right and left enclosure separation is of nominal concern.
WHG
Is that exist a defined safe frequency range for common comprtment arrangement ?

Thank you
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Old 21st April 2014, 04:38 AM   #9
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Default More

Quote:
Originally Posted by oaristys View Post
Is that exist a defined safe frequency range for common comprtment arrangement ?

Thank you
In general, the studio mix determines at what frequency, below which, the right and left LF signals have been blended. However, when signal wave length becomes comparable to speaker separation (in this case, closely spaced), the drivers are going to interact at and below those frequencies irrespective of whether they are housed in separate or joined enclosures.
At this point you will not be able to tell from which driver the signals are comming from due to this close spacing.
At frequencies above this range, assuming sufficient lining of interior enclosure walls, there will be negligible audible effect. It is the isolation of tweeters by separate back boxes that is important, not if the woofers are “joined at the hip”.

Regards,
WHG
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