There is very little informations about SR-1 ,and almost nothing about SR-2 ,even nothing in the Stax Histry : http://www.stax.co.jp/Export/History.html I think hunt them is almost impossible. Just wonder are there any of SR-2 still exist

They very similar.They are like time machine ,you put them on your head and you go back to the sixties :) Sound is not very good compare to Lambdas.They have poor stereophony compare to later Stax so it is time machine,part of a histry,colectors item more then for listening. So many years since...

Regards bearded man

You may find some help here : http://www.head-fi.org/t/57805/history-of-the-akg-k1000

If someone looking for: http://www.ebay.de/itm/Sennheiser-HE-90-Orpheus-Original-First-Batch-The-Best-Headphones-in-the-World-/321620902336?pt=UK_AudioVisualElectronics_HomeAudioHiFi_Headphones&hash=item4ae21981c0

My K1000 s/n 2000 has sliding notches.I had other pair 2000 as well and had the same way working temple pads.

Highland Park, my favorite one :-)

Magiccabbage If you love to hear that not only read just take your HD800 ( I sold mine) and visit me.It's only 300km.

Paint on signs on my K1000 was partly wiped off so removed it completly. It looks not bad I think,may be even better :-)

Correcting How I found K1000 serial numbers start from 1000

I Poland retail price for SR-009 is 4900euro ( 2 years warranty) Arnaud How much cost SR-009 in Japans audio shops ,same like in PJ?

I spoke with AKG Vienna and they comfirm- K1000 serial numbers strart from 1000.

Heinz ,do you think that may be right,s/n start from 1000 ?

The highest s/n I have seen is bit more then 11000.

4 series ,each 1000 pcs ? are you sure ? Before you said: "About "bass heavy" and "bass light" versions: I remember back that the original ~ 5000 pcs was shipped with a black bright box. This version - I'm sure - was produced with the target 25Hz f0. There was no additional changes at least...

In my opinion there is nothing better or even equal in HD800 then in Orpheus.

Some updates. My "new" K1000 has very little rub&buzz ,very very little.Issue on these is the smallest from all pairs I had. We have another 02000 K1000 pair in town and tomorrow Im gonna check are they sounds quite same. Im curious is the good sounding ( good to my taste of course) depends...

Is enyone here with s/n < 100 or < 1000 ?

Big thanks Heinz I thought too - membrane is not at very center of magnet coil gap and when moving with low bass hitting or touching magnet coil . I placed magnet coil in the "basket" but higher, above mambrane edge . So high to be above mambrane but close enough to let the magnet field move...

Hello Heinz and all K1000 fans. My K1000 s/n ~02000 I spent weeks and weeks trying to find and eliminate very low frequency issue/fart/rub&buzz or whatever we call that nasty thing. First tought ,some loos parts rattle ( becasuse that how it's sounds).I hold headphone housing tight with hand...

I had many electrostats and never meet the problem like channel imbalance. My old headphones looks and sounds like brand new.

Yes I would choose Orpheus from those three.Going further I would choose SR-Omega over SR-009.I like soundstage , deep,musical presentation with tone litle more on warm rather than a bit on bright and cold side.Also i prefer bit more soul and magic than neutrality or reality. That how are...

I don't think Stax is making two batchs of 009, one better for dealers and second worst for PJ. There is one production line and I think all 009 are built with same quality.May be PJ is selling more 009 than other dealers and that is why issue is more popular on PJs headphones.

Are the channel imbalance problem mostly at first weeks of use or after longer time like above?