Better do it quick if it goes down...they'll build a wall. 'Cuz you know what'll happen..they'll blame Canada.
https://www.youtube.com/watch?v=bOR38552MJA
Mexico will probably retaliate...hit the border in droves just to overload the system. It'll be like a scene from World War Z....
Damn socialists are everywhere....simpering sympatico scum slurping snot sniveling shirking slimy slavering soul searing snide stalkers stomping simplistic souls searching simply sane solutions....capitalism corrupters are Everywhere...I'm so tired of this I think I'll go fall over in apathy and get under some millionaire's hob-nailed boot on my neck just to show them how complacent I am. *Blah* Take THAT, 1%ers!
I'm anonymous, and I approve of this message....
https://www.youtube.com/watch?v=bOR38552MJA
Mexico will probably retaliate...hit the border in droves just to overload the system. It'll be like a scene from World War Z....
Damn socialists are everywhere....simpering sympatico scum slurping snot sniveling shirking slimy slavering soul searing snide stalkers stomping simplistic souls searching simply sane solutions....capitalism corrupters are Everywhere...I'm so tired of this I think I'll go fall over in apathy and get under some millionaire's hob-nailed boot on my neck just to show them how complacent I am. *Blah* Take THAT, 1%ers!
I'm anonymous, and I approve of this message....
*L* Another episode of "The Odd Couple"? Nah, pass...we've got our own tragicomedy playing out already. I'm sure the greater audience is holding it's breath already, wondering who wrote this plot. So far the actors are acting up and flubbing their lines...
I don't have the heart to just 'flip' stuff...Habitat been very good to me, and I'm sure whomever snagged them hopefully is enjoying them. I'll chalk it up to keeping the karmic balance tipped to the positive. And 'the Project' will move along in spite, despite, and alright....
I don't have the heart to just 'flip' stuff...Habitat been very good to me, and I'm sure whomever snagged them hopefully is enjoying them. I'll chalk it up to keeping the karmic balance tipped to the positive. And 'the Project' will move along in spite, despite, and alright....
Are there any commercial versions of bending drivers available?
I really like the German Physics driver which is not too big and the carbon version is not so delicate as titan which would bend if you gave it a wrong look.
Basically, I've been dreaming of building GR Research OB subwoofer with such driver on top and high pass it from let's say 120Hz. ..cannot get the driver though.
I really like the German Physics driver which is not too big and the carbon version is not so delicate as titan which would bend if you gave it a wrong look.
Basically, I've been dreaming of building GR Research OB subwoofer with such driver on top and high pass it from let's say 120Hz. ..cannot get the driver though.
HHR speakers has the TLS-4, which is quite similar to the GP drivers...
HHR Exotic Speakers
GP does show the DDD driver as an item in it's product lineup, both in carbon and titanium.
Cost of any of these is unknown to yours truly...and since I'm DIY'ing my own, it's somewhat unimportant. Mine may not be as sophisticated or 'developed' as theirs, but they do work and their biggest cost is my labor. The parts, up to now, has been inexpensive if not downright cheap.
I'd pass closer to 200Hz personally, but that's based on what my units respond to...
There is another Walsh/bending driver available, but my bookmark list is on another 'puter not available to me at this time, since I'm out of town on business for another week +/-....
Good luck with your quest...*G*
HHR Exotic Speakers
GP does show the DDD driver as an item in it's product lineup, both in carbon and titanium.
Cost of any of these is unknown to yours truly...and since I'm DIY'ing my own, it's somewhat unimportant. Mine may not be as sophisticated or 'developed' as theirs, but they do work and their biggest cost is my labor. The parts, up to now, has been inexpensive if not downright cheap.
I'd pass closer to 200Hz personally, but that's based on what my units respond to...
There is another Walsh/bending driver available, but my bookmark list is on another 'puter not available to me at this time, since I'm out of town on business for another week +/-....
Good luck with your quest...*G*
I'll also note that my driver's cones are slightly larger physically than both the HHR and GP DDD units...based on the size of the original Walsh cone's transition from metal to paper cone materials. A 'best guess' on my part...I'd love to subject mine to laser interferometry to see where on the cone it transits from radial to pistonic motion, but that equipment is unavailable to me at this point and for the foreseeable future.
If anyone has any thoughts on doing the above with a laser pointer hack, I'd love to hear it...*L* But I suspect the results would be nearly as crude as my hearing is flawed.
If anyone has any thoughts on doing the above with a laser pointer hack, I'd love to hear it...*L* But I suspect the results would be nearly as crude as my hearing is flawed.
TLS-4 seems as something I might give a try.
One other thing, given the recent development in the 3D printing and various materials available now (carbon fiber for example), it might be useful to jump into 3D printing world and actually make one. Would it work well? Well, that's another question. Anyhow, one would be able to produce the whole set (base, cone, top) that looks less DIY and is more wife friendly.
One other thing, given the recent development in the 3D printing and various materials available now (carbon fiber for example), it might be useful to jump into 3D printing world and actually make one. Would it work well? Well, that's another question. Anyhow, one would be able to produce the whole set (base, cone, top) that looks less DIY and is more wife friendly.
Mmmm, base and top support structures, yes. I know that 3D printing is capable of doing those for sure. To totally 'print' a driver would require a device that could handle multiple materials, which I'm not sure is possible at this time. I know that they're now capable of printing some metals, but I'd wager that the cost involved might prove breathtaking...
*G* The SAF (Spouse Approval Factor) has been and will always prove to be a consideration for any addition to one's chosen listening environment. I've been paying a certain amount of attention to the 'look' of what I've been doing, with a mind towards a simple column shape with a top 'wrap around' grille. The column itself would be mere support...the GP DDD drivers in some of their 'higher end' offerings don't have any enclosure to speak of beneath them. If the driver exhibits no pistonic motion of the cone, it doesn't need an enclosure since it's not generating any frequencies that would need such....
I have an older pair that I'm using in my office as 'desktop' speakers (although they're on a shelf above my desk, to be totally accurate). They sit on their bases with a pad of foam under them to eliminate any vibration. A small Sony sub is under my desk. Together they act as my 'monitors' for the 'mains' in the adjoining space...
In a nutshell, it works. No, they can't play as loudly as the 'mains' (two larger pairs) in said adjoining space, but the response is similar enough to my satisfaction. But I'm hopelessly biased, which should be expected. *L*
The smaller pair are similar in size to the GP units, perhaps slightly smaller. I can't speak to the size of the TLS-4's....I suspect they're perhaps larger than the GP's, but smaller than my V.3's (my 'mains').
In any case....if you go forth with the TLS-4's, I trust you'll be pleased with their quality. They certainly look on a level with the GP drivers in fit and finish. Give Dale my regards, and I'm sure he'll be happy to advise you on your application intentions....
Oh, and let me know how it goes. I've not had the pleasure of hearing them IRL, but I know firsthand how and what the breed does. I hope you'll be as pleased as I am with the experience...
*G* The SAF (Spouse Approval Factor) has been and will always prove to be a consideration for any addition to one's chosen listening environment. I've been paying a certain amount of attention to the 'look' of what I've been doing, with a mind towards a simple column shape with a top 'wrap around' grille. The column itself would be mere support...the GP DDD drivers in some of their 'higher end' offerings don't have any enclosure to speak of beneath them. If the driver exhibits no pistonic motion of the cone, it doesn't need an enclosure since it's not generating any frequencies that would need such....
I have an older pair that I'm using in my office as 'desktop' speakers (although they're on a shelf above my desk, to be totally accurate). They sit on their bases with a pad of foam under them to eliminate any vibration. A small Sony sub is under my desk. Together they act as my 'monitors' for the 'mains' in the adjoining space...
In a nutshell, it works. No, they can't play as loudly as the 'mains' (two larger pairs) in said adjoining space, but the response is similar enough to my satisfaction. But I'm hopelessly biased, which should be expected. *L*
The smaller pair are similar in size to the GP units, perhaps slightly smaller. I can't speak to the size of the TLS-4's....I suspect they're perhaps larger than the GP's, but smaller than my V.3's (my 'mains').
In any case....if you go forth with the TLS-4's, I trust you'll be pleased with their quality. They certainly look on a level with the GP drivers in fit and finish. Give Dale my regards, and I'm sure he'll be happy to advise you on your application intentions....
Oh, and let me know how it goes. I've not had the pleasure of hearing them IRL, but I know firsthand how and what the breed does. I hope you'll be as pleased as I am with the experience...
"To omni or not to omni...that is the question..."
Mmmm, base and top support structures, yes. I know that 3D printing is capable of doing those for sure. To totally 'print' a driver would require a device that could handle multiple materials, which I'm not sure is possible at this time. I know that they're now capable of printing some metals, but I'd wager that the cost involved might prove breathtaking...
*G* The SAF (Spouse Approval Factor) has been and will always prove to be a consideration for any addition to one's chosen listening environment. I've been paying a certain amount of attention to the 'look' of what I've been doing, with a mind towards a simple column shape with a top 'wrap around' grille. The column itself would be mere support...the GP DDD drivers in some of their 'higher end' offerings don't have any enclosure to speak of beneath them. If the driver exhibits no pistonic motion of the cone, it doesn't need an enclosure since it's not generating any frequencies that would need such....
I have an older pair that I'm using in my office as 'desktop' speakers (although they're on a shelf above my desk, to be totally accurate). They sit on their bases with a pad of foam under them to eliminate any vibration. A small Sony sub is under my desk. Together they act as my 'monitors' for the 'mains' in the adjoining space...
In a nutshell, it works. No, they can't play as loudly as the 'mains' (two larger pairs) in said adjoining space, but the response is similar enough to my satisfaction. But I'm hopelessly biased, which should be expected. *L*
The smaller pair are similar in size to the GP units, perhaps slightly smaller. I can't speak to the size of the TLS-4's....I suspect they're perhaps larger than the GP's, but smaller than my V.3's (my 'mains').
In any case....if you go forth with the TLS-4's, I trust you'll be pleased with their quality. They certainly look on a level with the GP drivers in fit and finish. Give Dale my regards, and I'm sure he'll be happy to advise you on your application intentions....
Oh, and let me know how it goes. I've not had the pleasure of hearing them IRL, but I know firsthand how and what the breed does. I hope you'll be as pleased as I am with the experience...
Mmmm, base and top support structures, yes. I know that 3D printing is capable of doing those for sure. To totally 'print' a driver would require a device that could handle multiple materials, which I'm not sure is possible at this time. I know that they're now capable of printing some metals, but I'd wager that the cost involved might prove breathtaking...
*G* The SAF (Spouse Approval Factor) has been and will always prove to be a consideration for any addition to one's chosen listening environment. I've been paying a certain amount of attention to the 'look' of what I've been doing, with a mind towards a simple column shape with a top 'wrap around' grille. The column itself would be mere support...the GP DDD drivers in some of their 'higher end' offerings don't have any enclosure to speak of beneath them. If the driver exhibits no pistonic motion of the cone, it doesn't need an enclosure since it's not generating any frequencies that would need such....
I have an older pair that I'm using in my office as 'desktop' speakers (although they're on a shelf above my desk, to be totally accurate). They sit on their bases with a pad of foam under them to eliminate any vibration. A small Sony sub is under my desk. Together they act as my 'monitors' for the 'mains' in the adjoining space...
In a nutshell, it works. No, they can't play as loudly as the 'mains' (two larger pairs) in said adjoining space, but the response is similar enough to my satisfaction. But I'm hopelessly biased, which should be expected. *L*
The smaller pair are similar in size to the GP units, perhaps slightly smaller. I can't speak to the size of the TLS-4's....I suspect they're perhaps larger than the GP's, but smaller than my V.3's (my 'mains').
In any case....if you go forth with the TLS-4's, I trust you'll be pleased with their quality. They certainly look on a level with the GP drivers in fit and finish. Give Dale my regards, and I'm sure he'll be happy to advise you on your application intentions....
Oh, and let me know how it goes. I've not had the pleasure of hearing them IRL, but I know firsthand how and what the breed does. I hope you'll be as pleased as I am with the experience...
PVC Folded Horn (Thatch-Horn)
If, I say If there is a 4" to 2" adapter you put a 2" pipe down a 4" pipe using steel rods in drill holes to suspend the 2". The 4" goes back up and that has been plugged with a PVC plug. the plug sits on top of a large upside down funnel that you can fill if you want. Take a large dowel like is used for closets and cut them to hold a 6" PVC pipe that goes around the 4" At the top you use a router and cut a plug for the 6" with a hole in the center for the 2". The 4" is around 3" below the 1/2" plywood plug you cut with the router. The Walsh sits on top of the 4" wide adapter with the surround attached to the adapter. The PVC can be sanded and painted with truck bed liner. The funnel is a 360* sound disperser and your 360* Walsh sits on the top. It will go as low as the Walsh can take it. Total length should be 10 to 12 feet.
There can be only one standing wave and that is in the center pipe. Take a fat piece of yarn with a nut tied on the end and hang it inside the pipe, no standing wave. Everything is easy to find, small footprint, should have at least medium or better WAF.
This Design is a smaller version of something I have been working on for a long time. The name for the Walsh folded PVC pipe horn is the DDC Thatch-Horn.
Thatch
If, I say If there is a 4" to 2" adapter you put a 2" pipe down a 4" pipe using steel rods in drill holes to suspend the 2". The 4" goes back up and that has been plugged with a PVC plug. the plug sits on top of a large upside down funnel that you can fill if you want. Take a large dowel like is used for closets and cut them to hold a 6" PVC pipe that goes around the 4" At the top you use a router and cut a plug for the 6" with a hole in the center for the 2". The 4" is around 3" below the 1/2" plywood plug you cut with the router. The Walsh sits on top of the 4" wide adapter with the surround attached to the adapter. The PVC can be sanded and painted with truck bed liner. The funnel is a 360* sound disperser and your 360* Walsh sits on the top. It will go as low as the Walsh can take it. Total length should be 10 to 12 feet.
There can be only one standing wave and that is in the center pipe. Take a fat piece of yarn with a nut tied on the end and hang it inside the pipe, no standing wave. Everything is easy to find, small footprint, should have at least medium or better WAF.
This Design is a smaller version of something I have been working on for a long time. The name for the Walsh folded PVC pipe horn is the DDC Thatch-Horn.
Thatch
Sorry, no pics. I have a dumb phone and my camera's battery is no good. I am doing the exact same thing except the outside is 12" PVC which is hard to get. My wife worked for a General Contractor and a couple of the guys got me 2 4' lengths at a site. The rest I sourced myself. My trouble is finding the right driver for the things. I had some 15" SC coax, but I loaned them to a friend whose old lady hired a moving truck and stole everything including a bunch of my gear one day while he was at work. Poor guy was scared to call me.
I have some 12s and some EV TRXs, again 12s, but I am waiting to listen to some Audio Nirvana 15s at the Lone Star Audio Fest on April 30th. A friend should be setting up with some in some folded wooden horns. At least I hope so. I missed it last year and haven't talked to him in a while. They were said to be the best speakers there last year. Pretty good for a guy working in his garage with a Skill Saw.
Thatch
I have some 12s and some EV TRXs, again 12s, but I am waiting to listen to some Audio Nirvana 15s at the Lone Star Audio Fest on April 30th. A friend should be setting up with some in some folded wooden horns. At least I hope so. I missed it last year and haven't talked to him in a while. They were said to be the best speakers there last year. Pretty good for a guy working in his garage with a Skill Saw.
Thatch
Well...a curve-linear cone would be best for at least a couple reasons...
and 3-D printing would be par excellence for that...BTW...
Most speakers have curve-linear shape...anyhoo......
You can 'print' w/ carbon aerogel now. the 'ideal' material IMO.
Super light weight (good high freq response) super high modulus (good high-freq and trans response)
With Walsh drivers if the wave velocity is less than super sonic it will not be radiated.
But, with a light and stiff cone wave velocity would be maintained into the lower frequencies...
Walsh drivers have unique sound...unlike any other...
Lurker coming out...
Been enjoying reading this thread for a while. Came across something I had not seen before, and thought I'd share a link to this MASTER’S THESIS 2010:9 A critical review of bending wave loudspeaker technology and implementation. Master’s Thesis in the Master’s programme in Sound and Vibration by KUONAN LI. Department of Civil and Environmental Engineering Division of Division of Applied Acoustics Room Acoustics Group CHALMERS UNIVERSITY OF TECHNOLOGY Göteborg, Sweden 2010
http://publications.lib.chalmers.se/records/fulltext/154618.pdf
I have not read all of it, much above my head, but seems to have some interesting points regarding bending wave theory, including German Physiks drivers.
Now a bit about myself though I don't expect I will have much more to contribute: I enjoy listening to all kinds of music through my four Ohm Walsh speakers plus two subwoofers for additional oomph below 60 Hz. The Ohms are two Ohm-2's plus two other unbadged Ohms with no bass or treble switches that I think are Ohm 1's. The 1's are similar size and sound to the 2's (but they go down to 40 Hz, vs 50 for the Ohm 2's) each is placed near each corner of the living room, alternating channels on a diagonal pattern, instead of LL/RR. I like Omni-directional speakers because I can't stand still in one place, and I enjoy channel separation as I move around the house, not so big on pin-point placement of instruments on a stage.
I also recently picked up a couple of "top-hats" F-2000 replacement drivers (the 2-way Ohm F-replacements) from a fellow that had upgraded his original F-cabinets twice, He ended up with F-4000's on top of modified F-bases. I plan to build base-cabinets for the F-2000's this summer. Love the DYI approach of this thread, though I don't have as much time to tinker as I'd like. Anyways - enjoy and keep on adding to the open source of knowledge about these speakers.
Sixto - Minneapolis.
Been enjoying reading this thread for a while. Came across something I had not seen before, and thought I'd share a link to this MASTER’S THESIS 2010:9 A critical review of bending wave loudspeaker technology and implementation. Master’s Thesis in the Master’s programme in Sound and Vibration by KUONAN LI. Department of Civil and Environmental Engineering Division of Division of Applied Acoustics Room Acoustics Group CHALMERS UNIVERSITY OF TECHNOLOGY Göteborg, Sweden 2010
http://publications.lib.chalmers.se/records/fulltext/154618.pdf
I have not read all of it, much above my head, but seems to have some interesting points regarding bending wave theory, including German Physiks drivers.
Now a bit about myself though I don't expect I will have much more to contribute: I enjoy listening to all kinds of music through my four Ohm Walsh speakers plus two subwoofers for additional oomph below 60 Hz. The Ohms are two Ohm-2's plus two other unbadged Ohms with no bass or treble switches that I think are Ohm 1's. The 1's are similar size and sound to the 2's (but they go down to 40 Hz, vs 50 for the Ohm 2's) each is placed near each corner of the living room, alternating channels on a diagonal pattern, instead of LL/RR. I like Omni-directional speakers because I can't stand still in one place, and I enjoy channel separation as I move around the house, not so big on pin-point placement of instruments on a stage.
I also recently picked up a couple of "top-hats" F-2000 replacement drivers (the 2-way Ohm F-replacements) from a fellow that had upgraded his original F-cabinets twice, He ended up with F-4000's on top of modified F-bases. I plan to build base-cabinets for the F-2000's this summer. Love the DYI approach of this thread, though I don't have as much time to tinker as I'd like. Anyways - enjoy and keep on adding to the open source of knowledge about these speakers.
Sixto - Minneapolis.