2-way esl

[vmk]

Yes, that's one solution, but I want to see trough my speaker, it's almost all about the looks

[JarreYuri]

Originally Posted by vmk

Yes, that's one solution, but I want to see trough my speaker, it's almost all about the looks

Hahahaha

[JonasKarud]

I can understand the see trough aspect, but it also means that you have to choose between good sound and good looks....but I agree that see trough is very important, look here at my speaker!


Picasa Web Albums - Jonas - Drop Box

It has a very low resonance peak in the audible spectrum. I suspect that this fact is due to that the weight of the stators dampens the 15-20 hz (with dismounted stators) resonance.

Another way is to place a 5 to 10 ohm resistor paralleled with a 50 uF audio capacitor in series with drive transformer input, to form a high pass filter. It also have the benefit of putting less low frequency energi strain into the transformer. Do some experiments with different values.

[JonasKarud]

JarreYuri, what's so funny?

[JarreYuri]

Originally Posted by JonasKarud

JarreYuri, what's so funny?

It was about "It's all about the looks"

[audio.ESL]

It's really a very beautiful project and I hope I could do the same work here.
May I ask one question?What high voltage bias do you use in the design?
Thank you very much.

[vmk]

Finally, the weather was bad enough for to do some measurements (not to go to fishing trouts )

But first, the high voltage, I don't know... A little bit lover than the sparks The hardware is from ER-Audio.

There's quite a lot noise in my impedance measurements, but I guess the message is coming trough anyhow. 1st one is plain panel, 2nd with 1 ohm series and 2.8 Ohm parallel "RS".
Now I have 1.8 Ohm parallel resistor and there's still bit of a bump in the impedance curve (I'm pretty sure that if I go to 0 Ohms it will level out ) as you can see from the 3rd picture and it's in a nicer scale too...

Now I have to try out that software and see if I can manage to create a circuit that is behaving like the measured one. Or are the measurements way of what they should be?!?

[vmk]

LSP-CAD is working fine Made an another impedance measurement to get the "complex impedance" txt-file exported for the LSP-CAD.

Something funny is going on with my measurements, much lower impedance bump this time. Have to make a prober circuit to measure the thing (now there's just a awful pile of leads everywhere and I'm using headphone amp of my stereos on top of that).

A couple of new charts below anyway, 1st panel only 2nd with RS+200uF series capacitor.

Been playing with the LSP-CAD and trying to get the notch filter values, it seems that I will end up with a huge inductor for the RLC-circuit. 50mH to get it down to 50Hz. Too big, but I still have hope, I'm probably doing something wrong here.

[a.wayne]

Very Weird impedance graphs , is there any filtering being used ? I would try another software ..

[vmk]

Too complex for me, back to 8.2 Ohm parallel resistor, because lower value resistor also kills bass starting from 500Hz. Argh. Tomorrow I will go fishing!