chinsettawong

Yes, my friend has given them to me for free. They also come with the Hev70 which, sadly, isn't working. I'll try to fix it later. Well, he isn't a DIYer and didn't have any other amp to try on and he thought that the amp and the headphones were all broken. He actually wanted me to take them apart to study the inside. The drivers come with a protective plastic sheet on the side facing the ear. The other side is protected using some kinds of very fine cloth - maybe silkscreen cloth. They did a good job protecting the dust. When I opened up the drivers, they were very clean. Talking about the sound, they sure sound pretty good to my ears. The bass impact isn't as good as Stax 407, but it's not too far off. Frankly speaking, I feel that my headphones sound very similar to HE60 with a bit better bass. By the way, Stax 407 is more sensitive than HE 60. The difference in spacer thickness of 0.15 mm sure makes a lot of difference. Wachara C.

A pair of HE60 was given to me by a Thai friend. The phones must have been in storage for a long time as the vinyl on the ear pads come flaky off. So, I have to disassemble and clean the interior. Taking this opportunity, I take a few pictures. The diaphragm to stator distance is around 0.5 mm. There is nothing special on the stator surface. Wachara C.

Very nice! More pictures please.

I just love to see your rebuild. Keep more photos coming. Wachara C.

The English document is here: http://www.savebase.com/InfoBase/downloads/tmp/DY294_EN_V4b.pdf

You can download an English version of the instruction from one of the sellers.

Well, I won't be using the ones I bought from Ebay. Just from the look, they are not that reliable anyway. Wachara C.

I used it as what suggested by Kevin. I shorted gate with source and plug into the tester. Drain went into collector hole and source in emitter. I set the voltage to 1000V and pushed test button. The number stayed at around 230V. Wachara C.

I've got the tester and tested 2sk216 that I bought from Pacific-semi and Ebay. They both measured at 230V. I'm quite sure that the ones I got from Pacific-semi are real, but the ones from Ebay looked fake. However, they tested OK too. What's going on? Wachara C.

Here is the picture of the 2sk216 I got from Pacificsemi today. They sure look real. What do you think?

I just received 2sk216 from Pacific-semi today. They look so real. They look exactly like (Original#2) in the picture. The code is 7 H3, though. What do you think? I'll try to take a good picture and post it here later.

Just received an email from Pacificsemi confirming that they have shipped out 2sk216. It's too late to cancel the order with them now.

Please put me down in the GB also. Thanks a lot. Wachara C.

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.