Cylinder ESL

[kelticwizard]

I'm no expert on electrostatics, but I have read some articles on building them.

If they are rear speakers, I assume these would not be going below 150 Hz or so?

Because the electrostatic diaphragm is stretched tight, I don't think the electrostatics require a whole lot of space behind them to work properly. In regular electrodynamic speakers, the speakers with the softest suspensions have the greatest Vas. With the diaphragm stretched tightly like an electrostatic has, I would think the Vas would be truly negligible.

The wavelength of 20,000 Hz-the shortest wavelength you would be concerned with-is 0.675 inches. An eighth of that would be 0.08 inches. It seems to me all you would have to do is make some kind of round structure with a diameter 0.16 inches less than the inside stator diameter, stick it in the middle of the speaker, and you should be all right.

Don't hold me to this, because I've never done it, but I really don't think a small electrostatic requires any appreciable amount of space behind it to operate properly.

[bear]

the problem is not what has been mentioned thus far.

the problem is how to curve a mylar diaphragm around a cylinder and support it at the same time??

sand would not likely be a good thing in the center, since it will look rather reflective at higher freqs, and reduce the volume behind the diaphragm, plus be heavy as all get out.

try a segmented esl, with a number of faces, think octogon, or higher frequency shape... easier to make, and if it sux, you have a bunch of nice ESL cells that you can use otherwise...

_-_-bear