This is something I never really thought about. Thank you again for an awesome video.

I make ESLs for a hobby. You can make good sounding esls and construction is simple. Actually graphene would not be the best coating as charge has to be static. But you may use graphene to make stators conductive. Have fun with esls.

You could buy big electrostatic speakers over 40 years ago. They were half the size of a door, and sounded really good. For some reason, maybe too high a price, they never really caught on. They should have a very good frequency response, if made properly. Another option was the crystal earpiece, using a piece of Rochelle salt between two electrodes. Very beloved as crystal radio receiver earpieces. You've set the mind ticking, Robert. Thank-you!

Thank you I really enjoyed you documentary on electrostatic loudspeaker

I have been dreaming of making something like this for years.

Wonderful stuff! Xx

Video was brilliant...loved it

Looks like a fun project

I think you need some sort of a fixed high voltage DC bias with the audio signal superimposed on it, otherwise the sound will suffer a frequency doubling (severe distortion). As the speaker is voltage driven, and the current is negligible, I would also doubt there would be any advantage in using your highly conductive coating on the plastic - a poor one would be equally effective.

Very interesting and informative video

thank you for a great channel and for you confirm and inspirate me for further experiments sir ,keep on teach me everything🙂

Good job sir 👍 🙏

The impedance mismatch between the amplifier and the transformer is causing the distortion in the speaker .That poor transformers primary is getting saturated

Are you sure the graphene diaphragm is thin enough? Thicker material results in truncated high frequencies. I've heard this problem with an overly thick mylar diaphragm installed on a bad sample of an "Audiostatic" speaker. Extreme roll off of highs was the result while other samples of the same speaker with the right mylar sounded just fine. Unless the membrane is sufficiently thin you'll never hear the detail and transparency an electrostatic is capable of. And that graphene looks way too thick for such an application. Martin Logan diaphragms are typically about .0005 inch or 10 microns thick.

Do you think that this device could be used as some sort of electrostatic microphone if connected to the correct components?

I was thinking for your lab more than myself but I do want to start marking it so getting properly set up would be smart , I ordered ferric chloride stuff but got it in liquid form and after reading comments again I realized I should have got it in powder form, could I dry it to make it the same as powdered like you used although the permanganate way seems a good option I had another thought a few weeks back about fine tuning an ultrasonic bath to emit the resonance frequency of graphite and seeing your speaker video tonight , I wondered if you have thought of it or even tried it yourself , seems plausible but I can’t imagine no one hasn’t thought of it before so maybe it doesn’t help split the graphite but if it helped it could be handy Is tony still working with you on concrete development Great job as always thanks a million for everything you share Edit, This was meant to be a reply about the fume cupboard comment I made on your earlier video

Form you description the "flyback transformer" seems to take a DC input and produce an alternating output hence the terrible distortion. It will only turn on on half of the audio cycle and only above some threshold. When I was a kid I had a valve record player and that had a normal loud speaker plus an electrostatic tweeter. I think the tweeter was just connected to primary of the output transformer, so only perhaps 100V swing, not 40kV.

Sprinkled some sand or salt or seeds on it, so you can see it bouncing around bitter. 😊❤

Hi ROB another great video, how about adding 4-5 mega ohms resistor in parallel and cut the sheets in a circular shape and at the far opposite side to adding an high voltage arrester then volume should be attenuated till you get the best performans not at the highest set.,keep the good work bro cheers mate .

Now if you held the small frame over a vented box your sound would be louder Thats why placement away from walls is critical with stats. However with the woofer id do a a periodic membrane over the front of the driver to load it down that way id get reflective bass sound off the low-end driver.

A very interesting video, any update?

If you cut out the centre of a sweet tin lid and force fit the sheets between would it amplify better? There's a covering for model aircraft called solar film,iron on adhesive,shrinks with heat,could it be grapheneated?

"Mr. Watson - Come here - I want to see you." ;)

How well does graphene respond to having holes punched in it?

could we use some of this to make speaker of lcd screen?

So you don't sell the graphene sheets anymore?

Product Page not found ?

Tin oxide makes a good coating for electrostatic stator

why not use a 50p space blanket?

So curious if we could make it higher quality sound

So how is the coated plastic made?

Who needs a separate phone screen and speaker when the screen can be the speaker. I wonder if one could do a stereo version by separating graphene coat into 2 sections.

Hi very interesting and immediately reminded me of the Leak speakers. The inearity of the LV to HV converter will be rather bad. About the build method could you suspend the two plates capacitor(this time with a foam separator. between)and then between the two outer plates of fixed high voltage and feed the audio to the inner capacitor so the whole lot will vibrate depending on respective rigidity.???

I think those are 3-6 volts DC input...

You are missing a pre-polarised stator to get this working properly. Plus a flyback transformer is a dismal choice for the A/C side of the system. Not the most well thought out on the physics side of how an electrostatic loudspeaker works. Most ESL's are using a very high resistance film. Your graphene film will be a low resistance setup. The low resistance can work but you will have a harder time keeping a proper set of stators charged.

I just looked up electrostatic speaker, and they cost $8000.

Electrostatic speakers are not famous for sound quality but there's a big potential for experimentation. Like trying multiple layers, multiple frequencies, maybe one layer but with different areas for different frequencies... Have fun :)

"Easy" - you just need a lab with $19k in equipment and electric engineering knowledge from 6 yrs of studies. Very easy. anyone can do it after 11 hrs of work!

This is something I never really thought about. Thank you again for an awesome video.