I wish I spoke Japanese...
http://www.spnet.ne.jp/~hasehiro/product/backlord.html
I have to go wipe the drool off of my keyboard now.
GnD
http://www.spnet.ne.jp/~hasehiro/product/backlord.html
I have to go wipe the drool off of my keyboard now.
GnD
I think you can order these. OMG, I am in abject lust.
http://www.spnet.ne.jp/~hasehiro/product/backlord/mm/mmtoku02.html
http://www.spnet.ne.jp/~hasehiro/product/backlord/mm/mmtoku02.html
Good point Bill. Since the layers are all identical, (ok, except for the outermost) this is quite practical.
I spent some time trying to figure out how to make Lynn Olsen's Ariel speakers this way, but got into other designs. Certainly would be time to get a high-end router.
Someone could make a kit and include just one templete. A lot cheaper to ship than all the layers!
Mark
I spent some time trying to figure out how to make Lynn Olsen's Ariel speakers this way, but got into other designs. Certainly would be time to get a high-end router.
Someone could make a kit and include just one templete. A lot cheaper to ship than all the layers!
Mark
Beyond totaly cool!
Sorry to understate my reation to the Japeneese Routerfest speakers.
With a CNC router or mill you could make these out of plastics, Corian, and other very dense materials.
This design concept is very cool. A web based service bureau that could deliver let you design on line and then deliver the layers would get my credit card out.
Sorry to understate my reation to the Japeneese Routerfest speakers.
With a CNC router or mill you could make these out of plastics, Corian, and other very dense materials.
This design concept is very cool. A web based service bureau that could deliver let you design on line and then deliver the layers would get my credit card out.
GrahamnDodder said:
Translated version:
http://www.worldlingo.com/wl/transl.../~hasehiro/product/backlord.html&wlg_table=-3
Re: Beyond totaly cool!
It's a shame I'm not in the US
Rob
BStrum said:Sorry to understate my reation to the Japeneese Routerfest speakers.
With a CNC router or mill you could make these out of plastics, Corian, and other very dense materials.
This design concept is very cool. A web based service bureau that could deliver let you design on line and then deliver the layers would get my credit card out.
It's a shame I'm not in the US
Rob
Attachments
Horns may not need the strength, but I suspect that they resonate like crazy at higher frequencies. At higher frequencies his is not a function of pressure, but the driver directly exciting the cabinet.
So good damping is a plus, which is what constrained layer gives you: two materials that want to resonate at diferent frequencies,
glued together so the "fight" each other.
I don't see any reason to apply this techinque only to horns. In the case of horn the advantages are a nice smooth path and it's probably easier to make a complex horn,
some transmission lines such as the Arial are pretty complicated so this technique has te same advantage of simplifiing construction, and they have pressure issues also
TAD makes it's cabinets this way for a sealed box. In this case it is to combat pressure and resonance. The incorporate bracing across the void, and the layers are horizontal
SO, my point is that this is the ideal construction for almost all high end speakers!!
So good damping is a plus, which is what constrained layer gives you: two materials that want to resonate at diferent frequencies,
glued together so the "fight" each other.
I don't see any reason to apply this techinque only to horns. In the case of horn the advantages are a nice smooth path and it's probably easier to make a complex horn,
some transmission lines such as the Arial are pretty complicated so this technique has te same advantage of simplifiing construction, and they have pressure issues also
TAD makes it's cabinets this way for a sealed box. In this case it is to combat pressure and resonance. The incorporate bracing across the void, and the layers are horizontal
SO, my point is that this is the ideal construction for almost all high end speakers!!
Curves!
Back in’74 we were quite a lot of diy speakerbuilders in Denmark, that made horns with rounded curves.
We used a mixture of cement and plaster and casted (right word?) all the non-linear parts. I’ve got drawings for huge hyperbolic horns (we called them concrete-horns).
My speakers were 60x60x140 cm and could play really LOUD and went down to around 35 Hz, but they had a very low WAF-factor (wife-acceptance-factor) and I had to chose between wife and speakers. I don’t have my speakers anymore(!), but I still have the tinnitus, that I got from listening to them! – and my wife!
Jørn
Back in’74 we were quite a lot of diy speakerbuilders in Denmark, that made horns with rounded curves.
We used a mixture of cement and plaster and casted (right word?) all the non-linear parts. I’ve got drawings for huge hyperbolic horns (we called them concrete-horns).
My speakers were 60x60x140 cm and could play really LOUD and went down to around 35 Hz, but they had a very low WAF-factor (wife-acceptance-factor) and I had to chose between wife and speakers. I don’t have my speakers anymore(!), but I still have the tinnitus, that I got from listening to them! – and my wife!
Jørn
Attachments
GrahamnDodder said:
No!
You won't have to pay anything.
It's from a danish magazine "high fidelity" and the article was from feb/marts 74! Old, yeah!
And we did a 1,4 scale-up version later in september - see picture.
I don't have acces to a scanner, but I can take photographs and send them to you by mail - and I warn you - I don't have the time for translating.
I have broadband, so I could send you large files - what about you?
Jørn
Attachments
Hi,
For making curvatures in TL’s and horn internals there is a material called Pliable MDF Board:
Also great for other curved boxes.
Cheers
For making curvatures in TL’s and horn internals there is a material called Pliable MDF Board:
An externally hosted image should be here but it was not working when we last tested it.
Also great for other curved boxes.
Cheers
Hi Medum,
It is readily available at most wood stores and DIY stores here in the Netherlands. I am planning to build my next CB bass speakers from it. It is even easier to work with than plain panels. Just make a skeleton of curved bracing plates and curved end plates and bend it around. It only eats a lot of glue
Cheers
It is readily available at most wood stores and DIY stores here in the Netherlands. I am planning to build my next CB bass speakers from it. It is even easier to work with than plain panels. Just make a skeleton of curved bracing plates and curved end plates and bend it around. It only eats a lot of glue
Cheers
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