I need a
link or info into this principal to properly evaluate the effect.
It has to be based on a physical principals.
thanks
ron
link or info into this principal to properly evaluate the effect.
It has to be based on a physical principals.
thanks
ron
ronc said:
Hi,
First page of the Enabl thread, no? A link to the paper (article) that Bud wrote on it.
EDIT: http://www.positive-feedback.com/Issue21/standingwaves.htm
ronc
EnABL appears to force a transverse wave up, off of the laminar layer in the boundary layer between cone and air. This happens immediately, or thereabouts, after the energy has entered the cone. As the transverse wave crosses the cone, this event appears to degrade until the final set of pattern rings. At this point the energy is once again booted above the laminar portion and as the energy crosses the pattern the "pinch", between blocks down in the laminar zone, raises the energy density per unit volume high enough that the rest of the transverse energy emits into the compression wave, without significant reflection back down the cone, through the already choked final EnABL pattern, siting in the laminar portion of the boundary layer.
Here is a link to a set of pics of a "basic treatment" driver, one Dave has been pounding the drums about recently.
http://picasaweb.google.com/hpurvine/Fostex127ETreatment
Net effect is to create a properly terminated transmission line, of the sort Lincoln Walsh developed his theories around. That pistonic model based test regimens don't show significant differences between treated and untreated drivers is embarrassing and perplexing, but might be pointing us toward a validation of Walsh's operating principles, ones supported to a degree by Baranek, in his seminal "Acoustics" text.
With a lot of qualitative statements left unsaid, this is as far as I have been able to push this, in all of these years. Doesn't reflect well upon my mental equipment perhaps, but hey, I lived in Texas once myself. That close of an encounter with the Lubbock lights excuses jes bout nythin.
Bud
EnABL appears to force a transverse wave up, off of the laminar layer in the boundary layer between cone and air. This happens immediately, or thereabouts, after the energy has entered the cone. As the transverse wave crosses the cone, this event appears to degrade until the final set of pattern rings. At this point the energy is once again booted above the laminar portion and as the energy crosses the pattern the "pinch", between blocks down in the laminar zone, raises the energy density per unit volume high enough that the rest of the transverse energy emits into the compression wave, without significant reflection back down the cone, through the already choked final EnABL pattern, siting in the laminar portion of the boundary layer.
Here is a link to a set of pics of a "basic treatment" driver, one Dave has been pounding the drums about recently.
http://picasaweb.google.com/hpurvine/Fostex127ETreatment
Net effect is to create a properly terminated transmission line, of the sort Lincoln Walsh developed his theories around. That pistonic model based test regimens don't show significant differences between treated and untreated drivers is embarrassing and perplexing, but might be pointing us toward a validation of Walsh's operating principles, ones supported to a degree by Baranek, in his seminal "Acoustics" text.
With a lot of qualitative statements left unsaid, this is as far as I have been able to push this, in all of these years. Doesn't reflect well upon my mental equipment perhaps, but hey, I lived in Texas once myself. That close of an encounter with the Lubbock lights excuses jes bout nythin.
Bud
Hi,
some interesting discorce again on EnABL.
I finaly got an almost complete set of driver modding stuff including PINK and black food dyes.
Dave, had a play with black food dye versus india Ink, gonna have to due some more playing, the black food dye looked a little washed out with my fist attempt, probably need to mix more in.
My fist victims are from some little cheep sterio's found lurking in kids bedrooms
, I am thinking of doing one driver initialy and doing a brief AB comparison.
The pink food dye is for the Girls Suzy Chang's (they willl be interesting when finished.)
Interesting to paint again using coloured PVA based medium, and of course its started wierd idea's in my head on adding a bit of artisic flair to future builds, the imediate thing that sprang to mind with the Fostex drivers was "speaker treatment meets Tiffany lamps"
Sorry to lower the scientific level down to art again chaps😀.
I would be interested in your views on EnABLed drivers Ron.
Scott, hope you get over the lurgy soon.
I'm hoping to convince myself to take the drivers out of the CC's long enough to satin finish the wood and put the EnABL pattern on the baffle, the trouble is its hard to turn the damm things off long enough to do the work!!!
Edit: Found the picture with the neopreme under the whizzer Dave, cheers, will study more later.
some interesting discorce again on EnABL.
I finaly got an almost complete set of driver modding stuff including PINK and black food dyes.
Dave, had a play with black food dye versus india Ink, gonna have to due some more playing, the black food dye looked a little washed out with my fist attempt, probably need to mix more in.
My fist victims are from some little cheep sterio's found lurking in kids bedrooms
, I am thinking of doing one driver initialy and doing a brief AB comparison.The pink food dye is for the Girls Suzy Chang's (they willl be interesting when finished.)
Interesting to paint again using coloured PVA based medium, and of course its started wierd idea's in my head on adding a bit of artisic flair to future builds, the imediate thing that sprang to mind with the Fostex drivers was "speaker treatment meets Tiffany lamps"
Sorry to lower the scientific level down to art again chaps😀.
I would be interested in your views on EnABLed drivers Ron.
Scott, hope you get over the lurgy soon.
I'm hoping to convince myself to take the drivers out of the CC's long enough to satin finish the wood and put the EnABL pattern on the baffle, the trouble is its hard to turn the damm things off long enough to do the work!!!
Edit: Found the picture with the neopreme under the whizzer Dave, cheers, will study more later.
😀
It's not too bad cheers -a massive dose of vitamin c, & e, folic acid & zinc seems to have stomped on it, so with any luck I should be back up to speed in a day or two. I'll try to give you a bell later Marc -I'm looking forward to hearing them. 🙂 I too am looking forward to Ron's views (as a physics etc. God) once he's familiarised himself with the background.
It's not too bad cheers -a massive dose of vitamin c, & e, folic acid & zinc seems to have stomped on it, so with any luck I should be back up to speed in a day or two. I'll try to give you a bell later Marc -I'm looking forward to hearing them. 🙂 I too am looking forward to Ron's views (as a physics etc. God) once he's familiarised himself with the background.
Packaging foam from small circuit boards (computer cards and the like), usually light grey and about 1cm thick.
extra soft version of the foam they make cheap mattresses from.
Very low mass, a piece can be easily blown across a table with breath.
I've been looking for pieces large enough to suit the 207's whizzer for a while.
Dave: is that a cut-and-shut segment from a larger ring to get that shape like a slice off a funnel?
what is good glue to do the joint with? most of the good foam I've found is only 10mm thick.
extra soft version of the foam they make cheap mattresses from.
Very low mass, a piece can be easily blown across a table with breath.
I've been looking for pieces large enough to suit the 207's whizzer for a while.
Dave: is that a cut-and-shut segment from a larger ring to get that shape like a slice off a funnel?
what is good glue to do the joint with? most of the good foam I've found is only 10mm thick.
OzMikeH said:
This is what i use -- comes in blue & pink as well. The original used foam from a furnace filter.
It is just an appropriate size srtip and i just friction fit them. 9ie this is a reversible tweek)
dave
I too am looking forward to Ron's views (as a physics etc. God)
No , not really. All i do is borrow off the Greybeards , in several fields, and combine their work with a few things i have learned by experments.
Once you understsand basic Newton physics the rest is fairly simple. Its just combining the math and ideas into a workable form.
Then puters take over to make things faster.
ron
No , not really. All i do is borrow off the Greybeards , in several fields, and combine their work with a few things i have learned by experments.
Once you understsand basic Newton physics the rest is fairly simple. Its just combining the math and ideas into a workable form.
Then puters take over to make things faster.
ron
I'm pondering the effects of the foam ring combined with EnABL.
It's going to change things a bit...
Do yours have the foam on them Marc?
Dave/Bud:
A strange idea occurred to me when considering EnABL blocks on phase plugs...
Machine down the bottom 5mm of the phase plug to a smaller diameter, then wind some wool around it. apply the microscale gloss over the plug and the first few turns of wool. after drying serrate the end of the microscale with a scalpel.
It's going to change things a bit...
Do yours have the foam on them Marc?
Dave/Bud:
A strange idea occurred to me when considering EnABL blocks on phase plugs...
Machine down the bottom 5mm of the phase plug to a smaller diameter, then wind some wool around it. apply the microscale gloss over the plug and the first few turns of wool. after drying serrate the end of the microscale with a scalpel.
I have a quick question primarily directed to Ron:
Would adding braces inside the curved mouth break up the "sound bubble", or should all braces be external?
Thanks.
Ed Robinson
Would adding braces inside the curved mouth break up the "sound bubble", or should all braces be external?
Thanks.
Ed Robinson
OzMikeH said:
I pondered the same thing before i shipped Marc's drivers, but nothing to experiment with them in (the Demetris still sit driverless in my haul awaiting their turn at the top of the queue to be fitted with FE207eN + FT17
And why, when chatting with him on the phone, i suggested he try the experiement.
dave
For those of you who lurk here, hoping for an easy, quick tutorial on how to EnABL, go here, to Hawthorne Audio's web site. Join, so you can use their forum to find the thread on EnABL, under speakers. The tutorials are in the 7th through ? th pages, though not all are posted yet. A very nice group of people, devoted to the Iris speaker.
http://www.hawthorneaudio.com/forum/viewtopic.php?t=1429
Bud
http://www.hawthorneaudio.com/forum/viewtopic.php?t=1429
Bud
BudP said:
The 1st of 3 packages has arrived (the Augies)... despite a week's head start a package from Seattle did not beat these here (from Michigan).
dave
Greetings,
I am planning to have a pair of the Curvy Chang's built. My cabinetmaker who is Almish needs to know what kind of bracing is needed for the cabinet and driver. Can someone provided a drawing for this.
Sincerely,
Cambe😎
I am planning to have a pair of the Curvy Chang's built. My cabinetmaker who is Almish needs to know what kind of bracing is needed for the cabinet and driver. Can someone provided a drawing for this.
Sincerely,
Cambe😎
Poke thru the plans at the planet10-hifi.com box library and at frugal-horn.com. You'll see a number of examples of holey driver braces. Curvy Chang really needs one of those (i believe every speaker needs one of those). Additional bracing on the main chamber sides is also recommended -- you can run strip braces or another holey brace from front to back forming a cross.
Remember: DO NOT put a brace dead centre, even off-centre a little bit makes it more effective.
There are pictures of what Marc did earlier in this thread. Attached is the latest render i have handy that has a driver brace in it (this box needs more bracing than shown too.
dave
Remember: DO NOT put a brace dead centre, even off-centre a little bit makes it more effective.
There are pictures of what Marc did earlier in this thread. Attached is the latest render i have handy that has a driver brace in it (this box needs more bracing than shown too.
dave
Attachments
probably a silly question, but I love the design shape of the Curvy Chang, but only the 167's fit in my budget.
Is there such a beast as the Curvey Chilli Chang ? hehehe
or if not, can I just use the CurvyChan and make it curvy by squishing the depth and lengening the 'box' (keeping same dimensions), then add a curve with relevant surface area same as CilliChang, but will be taller to allow for box squish ... If you know what I mean. ( I might even have asked this previously :-/... sorry if I have.)
😎 😎 😎 😎 😎 😎 😎 😎
Cheers, stevo.
musn't .... buy... drivers... ah stuffit, get some wood, glue and POWER TOOL it into a speaker !!!!!!
Is there such a beast as the Curvey Chilli Chang ? hehehe
or if not, can I just use the CurvyChan and make it curvy by squishing the depth and lengening the 'box' (keeping same dimensions), then add a curve with relevant surface area same as CilliChang, but will be taller to allow for box squish ... If you know what I mean. ( I might even have asked this previously :-/... sorry if I have.)
😎 😎 😎 😎 😎 😎 😎 😎
Cheers, stevo.
musn't .... buy... drivers... ah stuffit, get some wood, glue and POWER TOOL it into a speaker !!!!!!
planet10 said:
coolness... keep me posted as im going to purchase some fe167e's,and have a go at some 3mm plate steel ccc's 🙂
with a nice dark burgandy 2pak finish hehehe the're gonna rock!
Hi All,
thanks for the info on the ring Dave, i'll give it ago soon (last week I had access to an endless supply of that foam).
Sorry again that I,m not realy on top of things at the moment, negotiations have ended with work, (finaly) and so I'm redundant, at the moment I think I'm sort of in shock, and trying to sort my head out. Its not all doom and gloom though, I've now nothing to loose so may go back to contracting, and I've got plenty of time to play music. (self pitying and moaning over)
The black food dye has a purplish tinge, I think personaly the India Ink gives a better looking black.
Cambe, I've shown my bracing earlier, but when I do another I will have the vertical braces as one piece as Dave sketch shows with the horizontal brace I have now. As I used MDF the extra curved pieces on the sides are not only for looks but where the compression chamber is proveides a double wall thicknes and the curved shape helps confuse any resonance modes the sides have.
Scott, look forward to hering from you and finaly getting an educated review of the Curvy Changs.
thanks for the info on the ring Dave, i'll give it ago soon (last week I had access to an endless supply of that foam).
Sorry again that I,m not realy on top of things at the moment, negotiations have ended with work, (finaly) and so I'm redundant, at the moment I think I'm sort of in shock, and trying to sort my head out. Its not all doom and gloom though, I've now nothing to loose so may go back to contracting, and I've got plenty of time to play music. (self pitying and moaning over)
The black food dye has a purplish tinge, I think personaly the India Ink gives a better looking black.
Cambe, I've shown my bracing earlier, but when I do another I will have the vertical braces as one piece as Dave sketch shows with the horizontal brace I have now. As I used MDF the extra curved pieces on the sides are not only for looks but where the compression chamber is proveides a double wall thicknes and the curved shape helps confuse any resonance modes the sides have.
Scott, look forward to hering from you and finaly getting an educated review of the Curvy Changs.
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