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Old 16th December 2012, 12:48 PM   #11
Frank40 is offline Frank40  Denmark
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I did take a Monacor SPH 170 C apart for it's magnet system, but I did order some voice-coils, spiders and some foam surroundings because I did not know where this project would take me.

Great link for the Bertagni Electroacoustic, I totally forgot but I did own a par of BES speakers many years ago.

I am still in the process of making a holder for the magnet-system.
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Old 16th December 2012, 01:18 PM   #12
freax is offline freax  Australia
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why not just one woven out of silk?

Would need some kind of chemical to make it rigid.
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Old 16th December 2012, 01:25 PM   #13
Frank40 is offline Frank40  Denmark
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Hi freax, it can bee done....Another hobby of mine is building airplanes here we use epoxy glue. It can be made with silk or fiberglass or even carbonfiber with build in suspensions at different levels in radius.
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Old 16th December 2012, 01:35 PM   #14
freax is offline freax  Australia
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what about this.

A skeleton speaker cone interlaced wireframe made out of lightweight plastic thatis then woven with silk strands?
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Old 16th December 2012, 01:48 PM   #15
xrk971 is offline xrk971  United States
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Is there a thread or forum where people make their own drivers from scratch? I mean the whole works like winding voicecoil, laying up suspensions and doping, forming cones from various materials, making different surrounds, etc. We would buy NIB magnets, and cannibalize the frame from another driver but otherwise it's 'roll your own' It's not so crazy to lay up cones out of feathers doped with epoxy, etc.
I would actually enjoy this but need guidance on theory and models so we don't just blindly make stuff that is bad. Heck, why not superconducting voice coils suspended in liquid nitrogen cryostat if you really want to go all out? I think custom cones with active damping would be pretty cool, as are active suspensions using rheorlogical fluids (aka magnetic slurry suspension shocks like on Ferrari's and race cars). You can make some really interesting no holds barred technological tour de force drivers.

Last edited by xrk971; 16th December 2012 at 01:57 PM.
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Old 16th December 2012, 04:39 PM   #16
Frank40 is offline Frank40  Denmark
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I do not know of any scratch building speaker sites, and can't find to much info on the topic on the internet to. But I do have some insight on how speakers work but I am no expert, but this is way I do thesis experiments.

When I started to designing air planes I did not know anything about that, but has learned along the way.

If you like to make a cone of depron you can do that with vacuum forming. I don't like the idea of making a cone out of feathers, feathers is basic horn or neighs and is a heavy material.
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Old 16th December 2012, 07:14 PM   #17
Frank40 is offline Frank40  Denmark
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It dose work and it dose sound quit nice, the efficiency is not impressive but that is not a problem for me. I need to make another one in order to test it for real.
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Old 17th December 2012, 12:59 AM   #18
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Great!
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Old 17th December 2012, 12:03 PM   #19
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Please feel free to coment
Fine stockings!

Regards zeoN_Rider
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Old 17th December 2012, 12:22 PM   #20
xrk971 is offline xrk971  United States
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Quote:
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It dose work and it dose sound quit nice, the efficiency is not impressive but that is not a problem for me. I need to make another one in order to test it for real.
Great job - looks like a lot of fun.
You might want to use L shape cross beam to reduce flex of that flat aluminum bar that may improve efficiency.
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