https://www.ebay.com/itm/Electrostatic-Speaker-Membrane-Dupont-Mylar-C-2um-20M/182167831438?hash=item2a6a0c838e:g:XBoAAOSwU9xUQPIj yw

If you do not mind sharing how you get less then 0.5 db across two diaphragms I would really like to know. Also it seems to me that some of the manufactures are making a lot of single diaphragm and then matching them to each other. Is there a benefit to one method vs other?

Hey, in the post https://www.head-fi.org/threads/diy-planar-magnetic-heapdhones-in-details.842282/page-17#post-14037714. Did you have any issues were ferric chloride would remove aluminium under mask traces?

Garuspik, first I would like to thank you for your contribution to the DIY community. I have been following your progress ever since you have started your DIY thread on the Russian forum and I would like to say that you have done an excellent job creating this headphone. One you feel like you...

I do not think this was a secret. I have asked a sennheiser representative about 8-10 month ago about any new headphones and he told me about closed HD-800.

Any one got a link to any comparisons between KR 300b ballon vs 300b Takatsuki vs we-300b reissue?

Thank you. Also it looks price of KR tubes is a bit cheaper then Takatsuki tubes.

Where do you guys buy your KR HP 300b ballon and 274B's from?

Hey guys I just got a back up pair of PX300B, and I would like to make sure it will work with my WA5-LE.

Not sure if it was mentioned above but 8K is with stock tubes, you need to pay extra for upgraded tubes.

Does any one know names and where I can purchase the test records used by Sennheiser for HE-1 audition?

If this is not to much to ask of WA5/WA5-LE owners to list their top 3 driver and rectifier tubes.

Does any one know where I can find a review TA-274 vs WE-274?

If you have any time can you post impressions of WE-274 vs other rectifiers please.

I think I am going to hear a prototype later on this month. If you want I can post some impressions.     Also have any of the WA5/LE owners have posted any comparisons of try to compare WU4GB (SS rectifier) vs other more expensive rectifiers like WE-274, WE-422 or TA-274?