Also the point that the spl falls off at about 1/2 the rate of cone speakers for distance.
PMA,
Yes, let's see any ESL panel do 116db@1watt output. Though I have heard some nice sounds out of a large electrostatic there was always something missing, and the localization of high frequencies is not one of there strong point with that much surface area. A ribbon tweeter would be preferred over a large panel in that regard and then you typically need to add a direct radiator for low bass at any real output without running out of excursion with the panels.
I can say I have enjoyed the sound of and electrostatic but it would not be my first choice.
Yes, let's see any ESL panel do 116db@1watt output. Though I have heard some nice sounds out of a large electrostatic there was always something missing, and the localization of high frequencies is not one of there strong point with that much surface area. A ribbon tweeter would be preferred over a large panel in that regard and then you typically need to add a direct radiator for low bass at any real output without running out of excursion with the panels.
I can say I have enjoyed the sound of and electrostatic but it would not be my first choice.
I am not sure, a colleague of mine used ESL panels (full range) at a high end exhibition and he had to check and monitor output level of the power amplifier very carefully, otherwise the resulting distortion, after exceeding certain not very high SPL level, was horrible.
I am interested in what less than 99.999% look like in relationship to the thin film and round wire or flat cable highly annealed as well as not. Data with out context is of less value . Example years ago the drug company would advertise the amount they spent on research in the billions dollars . However they spent 1.5 times that much on advertising .
That effect on the edge may relate in some way to the processing done to copper that is bonded to pc boards . But those effects of treating copper start to show up in the 4ghz plus range. Context helps.
PMA,
I was referring to your obvious horn reference with that 116db output level. I have never heard a panel speaker approach that level of output without excursion limits.
I was referring to your obvious horn reference with that 116db output level. I have never heard a panel speaker approach that level of output without excursion limits.
Ah, you mean Merhaut's electrostatic speaker. Prof. Merhaut was my teacher at Prague Institute of Technology, I studied electroacoustics. He was the inventor of the speaker shown. The speaker had range 1kHz - 20kHz (above). It was the only speaker I know with non- oscillatory impulse response. 10 - 20us rectangular impulse was a rectangular impulse with rounded edges ...
It is a differential electrostatic driver, membrane is heavily loaded so that the response is extremely flat and step response is without overshoots. It was used as midrange and tweeter, in one driver.
http://www.google.com/patents/US3590169
It is a differential electrostatic driver, membrane is heavily loaded so that the response is extremely flat and step response is without overshoots. It was used as midrange and tweeter, in one driver.
http://www.google.com/patents/US3590169
It still isnt lower over the whole freq range as the QUADs.
Actually, I like horns.... except for the bass. I had a three-way all JBL horn system as my first high-end system. The new QUADs are not directional.... the new QUADs are more fig-8 and omni-directional at all freqs. Horns ability to shape the dispersion or polar pattern is a plus in some cases. But for a full range driver with good spl and very flat freq response and very low distortion -- taking everything into consideration (and no biamping/xover) -- the newer QUADs are a great tool or instrument as well as accurate music reproducer.
I use them for evaluating other gear because they are so accurate and not a large producer of distortion. If you play the QUADs at 75-80dB spl for testing use, their thd is even lower. Great tool for everything. But I do have to augment the strength and dept of the bass to listen to my kinda music. I am trying to keep the extension/power drivers thd as low as possible. Something that would be totally impracticle for a bass horn in my house.
Point being: Low speaker distortion helps a lot to hear other components distortion.
-RM
Actually, I like horns.... except for the bass. I had a three-way all JBL horn system as my first high-end system. The new QUADs are not directional.... the new QUADs are more fig-8 and omni-directional at all freqs. Horns ability to shape the dispersion or polar pattern is a plus in some cases. But for a full range driver with good spl and very flat freq response and very low distortion -- taking everything into consideration (and no biamping/xover) -- the newer QUADs are a great tool or instrument as well as accurate music reproducer.
I use them for evaluating other gear because they are so accurate and not a large producer of distortion. If you play the QUADs at 75-80dB spl for testing use, their thd is even lower. Great tool for everything. But I do have to augment the strength and dept of the bass to listen to my kinda music. I am trying to keep the extension/power drivers thd as low as possible. Something that would be totally impracticle for a bass horn in my house.
Point being: Low speaker distortion helps a lot to hear other components distortion.
-RM
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I didn't zoom in so didn't see that this is an electrostatic horn loaded design. Interesting.
Did the design ever make it to a commercial product level? I see by the year this was some time ago.
They have a nano center here with all the bells and whistles. SEM's, TEM's, STEM'S, all kinds of acronyms..I gave up understanding that tech. Now somebody watches electrons???
sheeesh..
jn
Yes,
They are still looking for that Dark Matter. Perhaps that is what we are missing in our audio systems, the dark matter between the notes! 😀
They are still looking for that Dark Matter. Perhaps that is what we are missing in our audio systems, the dark matter between the notes! 😀
No. That era was not suitable for commercializing of good ideas originated behind iron curtain.
Hey scott, did that resistor find any use?
I'm workin the next one in .092 brass with real leads this time.
Man, I can't believe the '629 with 270 volts common mode capability. I wouldn't have expected an on chip R to do that.
jn
I'm workin the next one in .092 brass with real leads this time.
Man, I can't believe the '629 with 270 volts common mode capability. I wouldn't have expected an on chip R to do that.
jn
Still doing some construction in the mancave, trimmed out the staircase for carpet last weekend. That part is neat, I think the DS shows how little thermal distortion there is too. They make it trivial to monitor supply current sense resistors even off of large supplies or output stage error voltage at full output even at 100V rms!
I don't think we can get that much past grey from what I have observed. 😀
Pavel, it is an interesting design idea, not sure how it would compare in efficiency to a tradition permanent magnet design with a standard voicecoil.
Pavel, it is an interesting design idea, not sure how it would compare in efficiency to a tradition permanent magnet design with a standard voicecoil.
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