The termination is extremely important as seen in my clone of the mbl speaker. I use pretty esoteric materials which might be a little too advanced to get readily but diaphragm material has to be a rigid light material with good damping. Carbon can meet these three with enough care. stiffness is attenuated by the angle of the cone and thus different velocities. It will only effect the frequency response if you take into account stiffness. The wave at the end of the speaker is like a literal wave hitting a wall think of how you would reduced that back splash.
This is no longer used in the dc gold speakers. They speakers rubbed at low volumes a spider is ok here even ferro-fluid.
Hi,
Is there any research about the cone angle of this thing? I mean, the differences among the factors of cone angles, dimensions, overall shapes, and the performance.
Being a bending wave device and a cone with such a steep angle, I suppose the vibrations would be very largely bell mode. In other types of bending wave devices, their dispersions are also very wide (and almost omni). So What would be the benefit? Does this utilize the axial motion better, so it coworks better with box tuning?
Is there any research about the cone angle of this thing? I mean, the differences among the factors of cone angles, dimensions, overall shapes, and the performance.
Being a bending wave device and a cone with such a steep angle, I suppose the vibrations would be very largely bell mode. In other types of bending wave devices, their dispersions are also very wide (and almost omni). So What would be the benefit? Does this utilize the axial motion better, so it coworks better with box tuning?
From I have seen no this is their secret formula and pretty advanced mathematics to boot. I do know of a simple calculator that along with some measurements could help developing this. the motion is a wave down the speaker not side to side. The brilliancy is the speed the voice coil doesn't have to "move" the cone simply bend it thus extremely fast impulses the cone would weight tenths of the actual weight. I wouldn't use it with a box.
pulled some posts, please hit the message and not the messenger or else someone's going to read only mode....My offer for a copy of the Walsh patent is still good. If anyone can explain to me how to post a .pdf file here, I will happily do so.
The patent explains a lot about cone angle, propagation velocity, damping and termination.
Certainly there have been many improvements in material and technology since the '60's. Modern computer modeling has also undoubtedly taken a lot of the mystery out of the "cone's" behaviour.
FIY, Radio Shack offered a tweeter that looked very much like the Walsh many years back, as did a couple of other companies.
The patent explains a lot about cone angle, propagation velocity, damping and termination.
Certainly there have been many improvements in material and technology since the '60's. Modern computer modeling has also undoubtedly taken a lot of the mystery out of the "cone's" behaviour.
FIY, Radio Shack offered a tweeter that looked very much like the Walsh many years back, as did a couple of other companies.
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Cretinish, no CREATIVE play...
Well, hi there, Cochleus. I figured somebody's still wandering in and wondering if anyone has been goofing about with the DECware/Conus approach to 'creative speaker repurposing'. Well, guilty...'course, I did these some 8 years ago. Dug them out of storage from moving 5 times in that interval. Finally have the space and motivation to push on to 'bigger/better/louder/all that...
"Submitted for your consideration", as Rod Sterling used to say...
The blue/green cones still make me grin.
Well, hi there, Cochleus. I figured somebody's still wandering in and wondering if anyone has been goofing about with the DECware/Conus approach to 'creative speaker repurposing'. Well, guilty...'course, I did these some 8 years ago. Dug them out of storage from moving 5 times in that interval. Finally have the space and motivation to push on to 'bigger/better/louder/all that...
"Submitted for your consideration", as Rod Sterling used to say...
The blue/green cones still make me grin.
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