Stone Speaker Cases - Page 2

chrisb · 3rd March 2012, 06:40 PM

very pretty

Cal Weldon · 3rd March 2012, 07:16 PM

Yowza!

Nanook · 3rd March 2012, 07:47 PM

as Cal says "Yowza!"

Of course there are always detractors of stone used for almost anything. I can only suggest that with a "batural" shaped stone as in the turntable, there is an opportunity to create stress risers, although they most certainly would not create fissures. The standing waves that could be created can have the effect of "smear" over some unknown frequency range.Granite can be notorious for this. Certainly the 100 lb. mass would minimize it.

Regarding stone loudspeaker enclosures, one ought to proceed slowly and very carefully. I would suggest as a minimum that prototypes be made with painted (both sides) MDF. Get the speaker project "right", then proceed with stone enclosures. I'd also suggest Dynamat or similar on all interior faces to reduce internal reflections. And if the enclosures are not to big or the dimensions could be altered, try for a floorstander (even a somewhat short one), so that having appropriate stands would not be required). You can always fill any cavities with dry sterilized sand, glass shot or lead shot. And make sure the base plate is robust enough to support the weight. Just some thoughts.

This is not that unusual, as the concrete horn loudspeaker thread demonstrates.

djn · 3rd March 2012, 08:28 PM

That is exactly what I ran into when I built the TT. All the cutting and grinding loosened one of the seems and it just let loose. I epoxied it back together then epoxied a 1/4 plate of aluminum on the underside so it would not happen again. The result was a very dead piece as the three different layers of material dampened each other out.

Tiroler · 09:20 PM

This manufacturer is famous for his products: http://www.vroemen.de/steinart1/index.html

For the ambitous DIYer, scroll down a bit on this site: Scan-Speak

I did a kind of a hybrid, works very well! See it here: https://picasaweb.google.com/engrave...ildingSpeakers

Cheers, Martin

Speedskater · 3rd March 2012, 11:50 PM

I found the AVS forum stone speaker thread:

Amazing stone speakers in the making - AVS Forum

Cal Weldon · 4th March 2012, 12:56 AM

I've made many a stone speaker...

...wait, slight spelling difference.

chrisb · 4th March 2012, 06:22 AM

Quote:

Originally Posted by Cal Weldon

I've made many a stone speaker...

...wait, slight spelling difference.

I see the "d" on your keyboard is still intermittent, and your typing dyslexic, isn't that Dave's specialitee?

Cal Weldon · 4th March 2012, 03:32 PM

d? ok, I was thinking r.

3rd March 2012, 06:40 PM	#11
chrisb diyAudio Member Join Date: Aug 2002 Location: victoria BC	very pretty __________________ you don't really believe everything you think, do you? community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi

3rd March 2012, 07:16 PM	#12
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Yowza! __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

3rd March 2012, 07:47 PM	#13
Nanook diyAudio Member Join Date: Feb 2004 Location: Chinook Country.Alberta	Stone turntables...and speakers as Cal says "Yowza!" Of course there are always detractors of stone used for almost anything. I can only suggest that with a "batural" shaped stone as in the turntable, there is an opportunity to create stress risers, although they most certainly would not create fissures. The standing waves that could be created can have the effect of "smear" over some unknown frequency range.Granite can be notorious for this. Certainly the 100 lb. mass would minimize it. Regarding stone loudspeaker enclosures, one ought to proceed slowly and very carefully. I would suggest as a minimum that prototypes be made with painted (both sides) MDF. Get the speaker project "right", then proceed with stone enclosures. I'd also suggest Dynamat or similar on all interior faces to reduce internal reflections. And if the enclosures are not to big or the dimensions could be altered, try for a floorstander (even a somewhat short one), so that having appropriate stands would not be required). You can always fill any cavities with dry sterilized sand, glass shot or lead shot. And make sure the base plate is robust enough to support the weight. Just some thoughts. This is not that unusual, as the concrete horn loudspeaker thread demonstrates. __________________ stew ☮ -"A sane man in an insane world appears insane."

3rd March 2012, 08:28 PM	#14
djn diyAudio Member Join Date: Oct 2004 Location: Waterford Michigan	That is exactly what I ran into when I built the TT. All the cutting and grinding loosened one of the seems and it just let loose. I epoxied it back together then epoxied a 1/4 plate of aluminum on the underside so it would not happen again. The result was a very dead piece as the three different layers of material dampened each other out. __________________ My "Art" website http://home.comcast.net/~djnagle/site/

3rd March 2012, 09:16 PM	#15
Tiroler diyAudio Member Join Date: Jan 2010 Location: Austria	This manufacturer is famous for his products: http://www.vroemen.de/steinart1/index.html For the ambitous DIYer, scroll down a bit on this site: Scan-Speak I did a kind of a hybrid, works very well! See it here: https://picasaweb.google.com/engrave...ildingSpeakers Cheers, Martin Last edited by Tiroler; 3rd March 2012 at 09:20 PM. Reason: spelling


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4th March 2012, 12:56 AM	#17
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	I've made many a stone speaker... ...wait, slight spelling difference. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

4th March 2012, 03:32 PM	#19
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	d? ok, I was thinking r. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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