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History of the AKG K1000? - Page 2

post #16 of 198
Quote:
Originally posted by Permonic
According to this article: "...it synthesizes the key ideas from the Stax SR-Sigma and the Jecklin Float into a single design..."

I found somewhere, that the parameters of Jecklin Float Model 1 are: 5Hz - 25kHz, 200 Ohm, weight 385g.

That's how Jecklin Float Model 2 looks like:


(Source: http://www.audiocircuit.com/9111-esh...1CMJEC-PIC.htm )

This guy, Martin Duerrentmatt is a father of Jecklin Float:


(source: http://www.avguide.ch/index.cfm?show...BF08EB9E47B99A )

Also check this link to see the info about Ergo Headphones (from the same company).
This headphone looks like a prop from "The Fifth Element" movie or maybe Dr. Who.
post #17 of 198
That picture is of a Jecklin Float electrostatic.
I have the mk2 Floats & they are a dynamic headphone that use exactly the same style headset.
post #18 of 198

Yes, we was influences by the STAX design too. However, it was the idea just to get nothing disturbing in front of the ear. So we created a huge membrane very light weight only...

post #19 of 198
Quote:
Originally Posted by hrklg01 View Post

Yes, we was influences by the STAX design too. However, it was the idea just to get nothing disturbing in front of the ear. So we created a huge membrane very light weight only...

Haha wow you just went over 8½ years back in time by bumping this thread


Edited by kazaakas - 10/7/12 at 1:26am
post #20 of 198
Quote:
Originally Posted by hrklg01 View Post

Yes, we was influences by the STAX design too. However, it was the idea just to get nothing disturbing in front of the ear. So we created a huge membrane very light weight only...

Are you from  Jecklin or AKG?  

post #21 of 198

hi, I was one of 3 developers of the K1000 at AKG. this was till 1989.

The major content i was responsible for was the Membrane, the filter and the magnet system...

post #22 of 198

Go on please, We'd all be very keen learning about the R&D route down to the very minute details...

 

popcorn.gif
 


Edited by Amarphael - 10/1/12 at 2:34am
post #23 of 198
Quote:
Originally Posted by hrklg01 View Post

hi, I was one of 3 developers of the K1000 at AKG. this was till 1989.

The major content i was responsible for was the Membrane, the filter and the magnet system...

 

Quote:
Originally Posted by Amarphael View Post

Go on please, We'd all be very keen learning about the R&D route down to the very minute details...

 

popcorn.gif
 

 

 

Yea, I'm with this guy. Are you kidding me?!?! We'd love to hear more about this fabled can!

post #24 of 198
Quote:
Originally Posted by hrklg01 View Post

hi, I was one of 3 developers of the K1000 at AKG. this was till 1989.

The major content i was responsible for was the Membrane, the filter and the magnet system...

And then...

post #25 of 198

hrklg01

 

Can I have your autograph????????////////

post #26 of 198
Yeees, more, MORE!
post #27 of 198

Yes, if indeed true... must hear more about its legacy!!

post #28 of 198

Ok, nice to hear that you are interested in those old development. To be honest, I'm really thinking that this product is outstanding till now in sound performance. However, the comfort to wear is poor, but this was never the main aim at this time.

The product developed before the K1000 was the K240DF. Meaning designed for the diffuse field. In simple words, the acoustic is designed so, that measured on the ear entrance the frequency response shall be the same as sound from far field listening to ideal speakers and sitting in a listening room.

After finalized the K240DF we recognized a quite large community especially in the German region which liked that sound adjustment.

On the other hand side, we developers was not satisfied, because the sound performance was very depending on the users ear and also we "hate" to wear closed headphone because of the heat surrounding the ear after a while.

Therefore we agreed to design a headphone without that disadvantages.... That was approx. 1985 when the K1000 project idea was born.

It was clear to us, that due to missing sound pressure chamber in front of the ear, the speaker driver has to deliver a very low resonance frequency and relative huge displacement. Also the effective membrane surface has to be very large and very stiff and lightweight too.

The development of this simple looking membrane took approx. 3 years, 'cause no proper working simulation programs exist at that time available for us.

The magnet/coil system was always questioned and alternatives like orthodynamic systems and electrostatic drive was also considered. However, the classic dynamic drive won. This was because of the special design of the radial magnet system of the K1000 which works very effective and could be designed very tiny. Therefore the effective acoustic inductance of the complete K1000 was lower than any other driver system we benchmarked. I other simple words: When measuring on the ear entrance wearing the K1000 the sound coming from free field, it's almost the same as without the headphone.

.... Any specific questions more ?

Kind Regards

post #29 of 198
Quote:
Originally Posted by hrklg01 View Post

Ok, nice to hear that you are interested in those old development. To be honest, I'm really thinking that this product is outstanding till now in sound performance. However, the comfort to wear is poor, but this was never the main aim at this time.

The product developed before the K1000 was the K240DF. Meaning designed for the diffuse field. In simple words, the acoustic is designed so, that measured on the ear entrance the frequency response shall be the same as sound from far field listening to ideal speakers and sitting in a listening room.

After finalized the K240DF we recognized a quite large community especially in the German region which liked that sound adjustment.

On the other hand side, we developers was not satisfied, because the sound performance was very depending on the users ear and also we "hate" to wear closed headphone because of the heat surrounding the ear after a while.

Therefore we agreed to design a headphone without that disadvantages.... That was approx. 1985 when the K1000 project idea was born.

It was clear to us, that due to missing sound pressure chamber in front of the ear, the speaker driver has to deliver a very low resonance frequency and relative huge displacement. Also the effective membrane surface has to be very large and very stiff and lightweight too.

The development of this simple looking membrane took approx. 3 years, 'cause no proper working simulation programs exist at that time available for us.

The magnet/coil system was always questioned and alternatives like orthodynamic systems and electrostatic drive was also considered. However, the classic dynamic drive won. This was because of the special design of the radial magnet system of the K1000 which works very effective and could be designed very tiny. Therefore the effective acoustic inductance of the complete K1000 was lower than any other driver system we benchmarked. I other simple words: When measuring on the ear entrance wearing the K1000 the sound coming from free field, it's almost the same as without the headphone.

.... Any specific questions more ?

Kind Regards

 

This is very interesting. The K240df and K1000 are two headphones I see discussed here so often, and up for sale a lot still. I had no idea they were connected in this manner! 

 

I have a few questions I'd be very interested to hear! 

 

1. Do you still work for AKG? If not, when did you stop working (approximately)? 

2. What do you think of the current AKG direction under HarmonKardon (for headphones)?

3. Are you still into headphones? What pairs do you own?

4. Were you involved at all with the K340. Those are certainly an interesting story in themselves as well.


Edited by elwappo99 - 10/2/12 at 12:31pm
post #30 of 198

There are 2 designs that AKG were able to create that still the best sounding of the most out there today and these are: K1000 and K340. Of course, there are other models to, but not such unique

 

Harman is milking and AKG is suffering, but maybe they were the only way to survive, who knows?

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