mondogenerator: I found that a great challenge is to measure the panels correctly!
Using my signalgenerator I can "hear" up to abt. 19kHz (with signal boosted ~6dB), but my 3dB point is at 15-16kHz ! 🙂
Measurement above 18k would be fun just to se how the panels behave there!
The reason for my rebuild is that I managed to "kill" 3-cells in one of my speakers due to "to heavy"-metall music and XO-filter tweaking => film sticking to stators => coating burned off the film!
The varnish used before seem to cause the film to stick once the film hits the stators.
With the polyester paint now used I hope to not have this problem + all the holes are perfectly coated!
With a little luck I'll have one speaker done with new panels this evening.
Will measure it and se how it compares to the old one.
/R
Using my signalgenerator I can "hear" up to abt. 19kHz (with signal boosted ~6dB), but my 3dB point is at 15-16kHz ! 🙂
Measurement above 18k would be fun just to se how the panels behave there!
The reason for my rebuild is that I managed to "kill" 3-cells in one of my speakers due to "to heavy"-metall music and XO-filter tweaking => film sticking to stators => coating burned off the film!
The varnish used before seem to cause the film to stick once the film hits the stators.
With the polyester paint now used I hope to not have this problem + all the holes are perfectly coated!
With a little luck I'll have one speaker done with new panels this evening.
Will measure it and se how it compares to the old one.
/R
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HAHAHA now that sounds like a fun way to blow a panel.....i must say that testing my speakers(although not ESL's) with loud overdriven guitar is a pleasurable and also useful test of HF response!!!! However even at max. volume..(30watt cambridge audio amp) i havent got the tweeters even relatively hot yet !
PS btw i drive a hartke 4x10" bass cab, with a 120 watt valve head for my guitar too! sounds more awesome than you may expect!
damper felt?
oh and another thing....DO you have damper panels on your ESL?
I only ask as i cant see any obviously there, and i thought that these were required to damp the fundamental resonance of the membrane.
oh and another thing....DO you have damper panels on your ESL?
I only ask as i cant see any obviously there, and i thought that these were required to damp the fundamental resonance of the membrane.
No - they play as you se them in yhe picture!
My XO is set to 200Hz right now.
I'm struggling with the question whether to use dustcovers or not!
I'll probably try it out, but focus right now is to make the second panel complete - and to build a new amp.
(gave my old one away as a wedding gift, and my small Lm1875 Gain Clone is having a hard time driving the panels! 🙂 )
/R
All panels have now been replaced!
I'll let them play for a week or two and the do some filal tweaks on the XO(expect the fo to go down a bit).
I also have to build a bigger amp. as my little workbech amp. has some trouble handeling the panels! 🙂
/R
I'll let them play for a week or two and the do some filal tweaks on the XO(expect the fo to go down a bit).
I also have to build a bigger amp. as my little workbech amp. has some trouble handeling the panels! 🙂
/R
Great work!! Snyggt jobbat! 😀
Have You thougt of using point-spacing in stead of parallell lined spacers to divide the membrane?
Doing so would cancel out a lot of parallell resonances from the spacers.
Audiostatic does this and also Magnepan.
Magnepan used to devide the membrane with parallell strips to get different resonant areas on the bass membrane but changed this in to just using a 2cm/diameter spacer on each tuning area.
So in practise it would mean that You would use small spacers or silicone ca 1 decimeter apart in that line Your center strip is placed now.
Any thoughts about this?🙂
Jerker "jarre" Lindborg
Picture is just for showing the spacers. Not how far they are spaced apart. 😉
Have You thougt of using point-spacing in stead of parallell lined spacers to divide the membrane?
Doing so would cancel out a lot of parallell resonances from the spacers.
Audiostatic does this and also Magnepan.
Magnepan used to devide the membrane with parallell strips to get different resonant areas on the bass membrane but changed this in to just using a 2cm/diameter spacer on each tuning area.
So in practise it would mean that You would use small spacers or silicone ca 1 decimeter apart in that line Your center strip is placed now.
Any thoughts about this?🙂
Jerker "jarre" Lindborg
Picture is just for showing the spacers. Not how far they are spaced apart. 😉
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Hi Jerker,
I have tried this on some test panels before with good results, but the choice off "full length" spacers on this version was mainly for stability reasons.
I'll try to not tweek the speakers for a while now and actualy listen to some music instead! 🙂
/R
I have tried this on some test panels before with good results, but the choice off "full length" spacers on this version was mainly for stability reasons.
I'll try to not tweek the speakers for a while now and actualy listen to some music instead! 🙂
/R
Hi,
please be aware that thickness, mass and tension of a magnetostic is very different to an electrostatic membran, so supports require different position and numbers on a specific area.
Capaciti
please be aware that thickness, mass and tension of a magnetostic is very different to an electrostatic membran, so supports require different position and numbers on a specific area.
Capaciti
That is why I wrote "Picture is just for showing the spacers. Not how far they are spaced apart. "
😉
Hi JarreYuri
Very interesting project your are building yourself 🙂 .... looks more like a planarmagnetic than ELS ..... where can we get the full story??
Very interesting project your are building yourself 🙂 .... looks more like a planarmagnetic than ELS ..... where can we get the full story??
Well... I read about the danish guy Egevang that built himself a pair of planar magnetic speakers based on an Apogee design.
This was called Egevang Ribb and was written about in High Fidality.
Now I have come to the point of building my own design.
I don't know yet if there is a patent or not.
I will give You all a separate topic for this.😉
Regarding electrostats I have a new idea but it will be put on hold due to (what I think) a bit costly design of output transformer.🙄😎
Looking forward to the description in a new thread 😀
Seems you are running some narrower cunductors in one side of the main membrane than for the rest ... is that to make one part run as mid, and the rest as bass?
Seems you are running some narrower cunductors in one side of the main membrane than for the rest ... is that to make one part run as mid, and the rest as bass?
Aaaah!
Now I know what You mean!
😛You are refearing to the picture I inserted!?
Nah, that is taken from the net and shows a Magnepan. Maybe a MG 3.6 model, I think.😀
Here are some pictures of what I have. Some of the models are pictures from the net.
Mine is the tall black one and the one with sand filled bars behind the magnets.😉
Picasa Web Albums - Jerker - La Folia
Just amazing! Incredible actually.
Flat down to 22Hz.
Watching a movie with them will make You feel the legs on Your pants vibrate.
Not to talk about the clearity.😀
But they are in a house. hehe
In my apartment I use QUAD esl 57.😉
Some cloth and a half box of staples later!
...and finaly mounted on the speakers!
I have to buy some more wood for the frames to be placed on the backside off the speaker - after that they are finished! 🙂......I hope.....
/R
...and finaly mounted on the speakers!
I have to buy some more wood for the frames to be placed on the backside off the speaker - after that they are finished! 🙂......I hope.....
/R
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