I think this black paper version is the best match for driver and housing. 580(black paper) was quite unstable (great performance driver and quite loosing cans) something small vibrations others occurred. But hd600 black paper was best match for driver and house. Wonderful one… This is such a...

Legendary HD600(black paper screen) driver.

Amazing!! I think CTX-1 is a flagship for Napolex.. They did more dampings and interesting structures for their cans. But CTX-3 was not, they just put drivers in their cans. Very interesting driver materials. Thanks for your wonderful job :)

Audiotechnica’s TOTL model in1970s AT706 driver.

Amazing pics!! Pioneer always make a amaze builds... but their sounds are not impressive..... A8 also have great build amazing! I love it

Great! However, I am a bit disappointed... The cans are missing dampers.

Sennheiser unipolar 2000

Driver of DUAL DK330 May be one of the earliest orthodynamic driver. But left one was dead..

I saw your pics. It seems to be very simmilar to mine. The sound stage of M9's was not much wide than current models, but the sound stage level was simmilar to other monitor's I think its midrange was so beautiful... I shares simmilar sound signatures to other audio-technica monitor models

Interesting! I have CTX-1 mk1 also, but driver seems to be bonded to housing very sticky.. So I gave up :( I'm looking forward for your job!!

Another first driver pic ever:) Napolex CTX-3 I think CTX-1 is much better. They said this are carbon coated driver.

I think difference is just changing magnets. Audio-technica changed magnets to neodymium. Dynamic range was extended. I read some reviews for m9 and m9x, they have similar sound signature. I think they have similar relationships to sony mdr cd900/cd900st

Maybe first driver pic ever! ATH M9 (1987)

Hi guys I received ath m9 today. Sound stage is small but bass is deep and vocal sound is amazing. But some times bass blind the midrange. Sound signature is very similar to nowadays audio-technica woods. interesting :)

Seller didn’t sent me a product yet. It will takes a week. I will update my inspiration:)

Hi guys! I bought this one from japanese shop ATH-M9 Do you have any information for this? It seems to be rare in this era

I drive my k1000 with an old YAMAHA amplifier dsp-a2070.. Yamaha amplifier have much power to drive my k1000. Sound is pretty good. It doesn’t break its sound signature. I think if you have amplifier which have enough power to drive speakers (around 100w) you can use them.

Yeah, I bought it on ebay, it was cheap one. it seems to be neglected for a long time(such as humid environment). It seems to be get rusty on their surface. I checked how driver works, It works fine!(quite suprise :) ) But I worried about rusty magnets lost its magnet power and lost its...

Hi! My K1000’s driver Magnets are rusty. What can I do in this case? There's nothing wrong with the sound, but it's likely to sound different from the designed sound. Thanks

Thanks for your answer!!

Hi owners! Recently, I reached a question mark after looking into some measurements. In Isolation's measurements, the K1000 shows different characteristics from other headphones under 200 Hz. Should I say this is a structural characteristic? Or did they measure it the wrong way? I'm very...

Thank you :) You are the best I will contact him

Hi every one. I bought amazing one on ebay. but some leather cushions were missing on my K1000. Is there a way for get this cushions for my wonderful k1000? or I will replace this to soft form. thanks :)

cool it seems to be technics EAH-830 I have one too :) wonderful ortho

Yeah, I know 😊😊 I just wanted to show this for everyone! Thanks for your great comment