chinsettawong

I've just placed an order with Pacificsemi, and I hope I get the real things this time.

Well, thanks for confirming they are fake. I'll just order new ones then. Could you recommend a good and reliable source to order from? Wachara C.

I'm not sure if the 2sk216 that I bought off Ebay are real. What do you think? Is there any simple way to test to see if they are real or fake?

Yes, I did take the stator coating into account. I think the stator is made of a drilled steel sheet with powder coating as insulation. My measurement might not be 100% accurate, but I would say that the diaphragm to stator distance should be between 0.35-0.4 mm. If you look at the photo of the stator closely, you will find that the stator surface isn't smooth. There are very small, micro spacers all over the surface. I think that Stax purposely makes that so that the diaphragm will have no chance of touching the stators. What do you think, Spritzer? Wachara C.

The brass spacers are 1.35 mm in thickness. If you take out the thickness of stator which is 1 mm, the diaphragm to stator distance is only 3.5 mm. Wachara C.

I am able to borrow a pair of broken 507 drivers from a friend to look at. Here are some pictures of all the internal parts.

Everybody's preferences might not be the same. What you like might not be the same as what others like. I say you should try to listen to the ESP950s first and see if you want to do anything to change what you hear. As for me, I like it better without any damping material on the drivers. That's with my own DIY drivers, of course. Wachara C.

What are you trying to achieve after the mods? Wachara C.

Get my boards today. Thanks Kerry for making this GB. Could someone help me with how to use this thing? Wachara C.

I've just received the package. Thanks Lil Knight for making this GB. Wachara C.

Payment sent!

Wow, I just noticed that my package was the first one being shipped out. Thank you very much. I'll PayPal you tonight. Wachara C.

Wow!

Perhaps the microphone that is used to measure the FR isn't of correct type. The roll-offs in high frequencies look terrible. Wachara C.

That would be fun. Let's do it. Wachara C.

How about you give me some measurements and I custom make the drivers for you to try? Wachara C.

Hi Jgazal, First of all, I'm not an EE. All I can tell you is from my experience making my own electrostatic headphones. You might have been confused about the earphone's drivers and the cup. The purpose of the earcup is simply to hold the driver in its proper place. Since you are dealing with high voltage, you want to make sure that the high voltage will not be able to do any harm to the person who wears the headphones. If you look inside Stax headphones, you would see a plastic enclosure holding the driver rigidly and tightly together. This is also made of plastic which is a good insulator. I can't speak for Stax, but my guess is that Stax has changed the earcup from plastic to aluminum because it simply looks and feels much better. I don't think it has anything to do with electrostatic discharge. Wachara C.

As far as the ear-cups, I'm sure that Stax is using anodized aluminum for making them. In this case, I do not think that they want to discharge electrostatic charge, but they want to insulate the ear-cups from any possible electrical leakage. You certainly don't want to get an electric shock when you wear them. Wachara C.

Wow!

Hi Lil Knight, Payment sent! Thanks for arranging this group buy. Wachara C.

My SR-407 isn't that comfortable either. The headband of SR-202 is more comfortable for me.

Nice!

Hi Lil Knight, My friends in Thailand ask me to buy some PCB for them. So the new total for me is now 18 sets of KGSSHV, 7 on and 11 off. I would like to have 2 extra psu boards. I've updated the spreadsheet. Thanks for arranging this GB. Wachara C.

Hi Lil Knight, I would like to have one set of KGSSHV, please. I've updated the spreadsheet. Wachara C.

Hi Soldermizer, Please do post some pictures. I really like to see how you make them. Wachara C.