Hi!
Does somebody knows this:
http://www.ear-usa.com/new_products.htm
What is this loudspeaker?
How is it working?
Tyimo
Does somebody knows this:
http://www.ear-usa.com/new_products.htm
What is this loudspeaker?
How is it working?
Tyimo
Yes, I know it.
.."Basically, it's a dynamic speaker system, with a tweeter and a midrange and a bass unit. The bass unit and the midrange drive a membrane. The bass unit makes a membrane of effectively 12" by 18" (305mm by 457mm) surface area bend and vibrate to put bass into the room. So it has dipole properties. I don't make the drive-units myself and I subcontract the cabinets, but it's still my basic principles."
But I don't understand this sentence:
...The bass unit and the midrange drive a membrane. The bass unit makes a membrane of effectively 12" by 18" (305mm by 457mm) surface area bend and vibrate to put bass into the room...
Maybe a drawing or a picture would help me to imagine how it works....
Tyimo
.."Basically, it's a dynamic speaker system, with a tweeter and a midrange and a bass unit. The bass unit and the midrange drive a membrane. The bass unit makes a membrane of effectively 12" by 18" (305mm by 457mm) surface area bend and vibrate to put bass into the room. So it has dipole properties. I don't make the drive-units myself and I subcontract the cabinets, but it's still my basic principles."
But I don't understand this sentence:
...The bass unit and the midrange drive a membrane. The bass unit makes a membrane of effectively 12" by 18" (305mm by 457mm) surface area bend and vibrate to put bass into the room...
Maybe a drawing or a picture would help me to imagine how it works....
Tyimo
Grown up computer speakers ?
I seem to recall that I saw someone put up pictures of something like this a few years ago. Was it on diyaudio .com ?
It was supposed to be a computer speaker. Basically it consisted of two vertical posts spread a few inches apart with a pvc (?) film stretched between the posts ( both sides). The driver was at the bottom and coupled with the air between the two membranes through a small hole at the bottom.
Rather simply made at that time. Supposed to sound very interesting. It was a dipole of course because it radiated from both sides . Did he get a patent for it at the time ?
There were pictures also with a brief description on how to make it.
I seem to recall that I saw someone put up pictures of something like this a few years ago. Was it on diyaudio .com ?
It was supposed to be a computer speaker. Basically it consisted of two vertical posts spread a few inches apart with a pvc (?) film stretched between the posts ( both sides). The driver was at the bottom and coupled with the air between the two membranes through a small hole at the bottom.
Rather simply made at that time. Supposed to sound very interesting. It was a dipole of course because it radiated from both sides . Did he get a patent for it at the time ?
There were pictures also with a brief description on how to make it.
Here you go !
I saw a different web page but at first sight the speaker looks the same !
http://www.audiojunkies.com/blog/495/decware-personal-planar-speakers
This was posted in 2007 . What I saw initially was much older !
I saw a different web page but at first sight the speaker looks the same !
http://www.audiojunkies.com/blog/495/decware-personal-planar-speakers
This was posted in 2007 . What I saw initially was much older !
Hey Dave....
Paul Burton and I started Highwood Audio and we produced a planar speaker driven by a voice coil. Paul left the company and went home to England and had dealings with NXT but I don't know if he had anything to do with Podium.
I know that Dalli built a loudspeaker with conventional dynamic drivers in which the mid and or bass drivers were covered by a sealed layer of mylar. The mylar then became a secondary radiator which was used to control the polar response of the loudspeaker. Perhaps Tim's new speaker employs a similar design. Hard to say with out actually seeing under the grill. Moray.
Paul Burton and I started Highwood Audio and we produced a planar speaker driven by a voice coil. Paul left the company and went home to England and had dealings with NXT but I don't know if he had anything to do with Podium.
I know that Dalli built a loudspeaker with conventional dynamic drivers in which the mid and or bass drivers were covered by a sealed layer of mylar. The mylar then became a secondary radiator which was used to control the polar response of the loudspeaker. Perhaps Tim's new speaker employs a similar design. Hard to say with out actually seeing under the grill. Moray.
I realize that this thread is at least six months old, however I do have something to ad to it.
My experiment:
The Point Source Principle - Ripple One Experiment
Tim de Paravicini can speak for himself, and maybe I'm on a different path.
Cheers, George/kach22i
My experiment:
The Point Source Principle - Ripple One Experiment
Tim de Paravicini can speak for himself, and maybe I'm on a different path.
Cheers, George/kach22i
For those interested in Bending Wave Loudspeakers and related stuff,
here are links to threads in the "Planar and Exotics" forum.
http://www.diyaudio.com/forums/planars-exotics/133711-piezo-nxt-type-panel.html
http://www.diyaudio.com/forums/planars-exotics/164414-wave-speakers-how-do-they-work.html
Maybe this Paper is good for a first look on different behaviour of conventional
"rigid cone" dynamic loudspeakers and bending wave transducers.
http://www.randteam.de/_Docs/Aes104 Distributed Mode Loudspeaker simulation model.pdf
This paper is in german, but sometimes a picture says more than
1000 words ...
http://www.wvier.de/texte/NXT_Tonmeistertagung.pdf
Kind Regards
here are links to threads in the "Planar and Exotics" forum.
http://www.diyaudio.com/forums/planars-exotics/133711-piezo-nxt-type-panel.html
http://www.diyaudio.com/forums/planars-exotics/164414-wave-speakers-how-do-they-work.html
Maybe this Paper is good for a first look on different behaviour of conventional
"rigid cone" dynamic loudspeakers and bending wave transducers.
http://www.randteam.de/_Docs/Aes104 Distributed Mode Loudspeaker simulation model.pdf
This paper is in german, but sometimes a picture says more than
1000 words ...
http://www.wvier.de/texte/NXT_Tonmeistertagung.pdf
Kind Regards
Airfoil: Successor of the "Linaeum" tweeter, which in fact is a bending wave transducer.
http://membrane.com/impact/products/prodairfoil_wtpaper.html
German Physiks: Conical bending wave transducer AFAIK based on Walsh invention
http://www.german-physiks.com/
Goebel: Flat panel bending wave transducer in flat cabinet
http://www.goebel-highend.de/en/products/detaille.html
Manger: Flat disc shaped bending wave transducer, operates below its coincidence frequency
http://www.manger-msw.de/
MBL: Maybe not intended to exhibit bending waves above the lowest resonance,
but is at least a "bending transducer"
http://www.mbl-germany.de/
NXT:
http://www.nxtsound.com/index.php
Ohm Speakers:
http://www.ohmspeakers.com
Podium:
http://www.podium-sound.com/
http://www.fairaudio.de/test/stand-lautsprecher-podium-sound-05-1.html
Museatex:
http://www.museatex.com/
Teragaki:
http://www.teragaki-labo.co.jp/products/about_terra-sp3000.html
Bertagni:
http://www.oaktreeent.com/web_photo...ertagni_PL-3_Sound-Panel_Speakers_collage.jpg
There may be further Manufacturers ... feel free to complete the list.
http://membrane.com/impact/products/prodairfoil_wtpaper.html
German Physiks: Conical bending wave transducer AFAIK based on Walsh invention
http://www.german-physiks.com/
Goebel: Flat panel bending wave transducer in flat cabinet
http://www.goebel-highend.de/en/products/detaille.html
Manger: Flat disc shaped bending wave transducer, operates below its coincidence frequency
http://www.manger-msw.de/
MBL: Maybe not intended to exhibit bending waves above the lowest resonance,
but is at least a "bending transducer"
http://www.mbl-germany.de/
NXT:
http://www.nxtsound.com/index.php
Ohm Speakers:
http://www.ohmspeakers.com
Podium:
http://www.podium-sound.com/
http://www.fairaudio.de/test/stand-lautsprecher-podium-sound-05-1.html
Museatex:
http://www.museatex.com/
Teragaki:
http://www.teragaki-labo.co.jp/products/about_terra-sp3000.html
Bertagni:
http://www.oaktreeent.com/web_photo...ertagni_PL-3_Sound-Panel_Speakers_collage.jpg
There may be further Manufacturers ... feel free to complete the list.
Last edited:
Hi
The inventor of the Direct Drive speaker was Brian Mitchell. I evaluated
some prototypes a few years ago before Tim de P adopted it.
The drivers were made by Fane. I dont know if they still are. They
were a flat panel of a matrix like material driven by a shortened cone
from a PA bass driver. The inventor experimented with lots of different
panel materials.
It was supposed to have a bass response better than that which you would expect from a dipole of this size. I believe he was using the driver resonance
to extend bass response. Our measurements did show that there was some
additional bass extension but not enough for our purposes.
The inventor of the Direct Drive speaker was Brian Mitchell. I evaluated
some prototypes a few years ago before Tim de P adopted it.
The drivers were made by Fane. I dont know if they still are. They
were a flat panel of a matrix like material driven by a shortened cone
from a PA bass driver. The inventor experimented with lots of different
panel materials.
It was supposed to have a bass response better than that which you would expect from a dipole of this size. I believe he was using the driver resonance
to extend bass response. Our measurements did show that there was some
additional bass extension but not enough for our purposes.
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