This is a review, listening tests and detailed measurements of the AKG K60, circa 1970s, new old stock headphone review. It is on kind loan from a member and costs US $170.
I am stunned how fresh, new and clean this headphone is! It feels like you have gone back in time. Owner sent this to me as AKG Vienna was supposed to have built this based on research:
Sounds kind of like how Harman researched headphone preference. Let's see where they got.
AKG K60 Headphone Measurements
They say a picture is worth a 1000 words:
I guess their research told them the main thing we care about is 100 to 500 Hz which considering that is vocal range, maybe that makes sense.
I am ignoring the bass distortion as that is high due to lack of output:
Take caution in looking at absolute distortion levels when the response is not flat:
Group delay is bizarre:
Impedance is quite high:
Sensitivity is slightly better than average:
AKG K60 Listening Tests
Listening to my first track, produced the muffled, "closed in a box" sound that you would expect. Interestingly, it was not annoying. It was a clean midrange response.
Conclusions
We have come a long way as far as knowing what a good headphone could be. Clearly a lot of bad ideas were going around decades back, even with good intentions in research and design.
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As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
I am stunned how fresh, new and clean this headphone is! It feels like you have gone back in time. Owner sent this to me as AKG Vienna was supposed to have built this based on research:
Sounds kind of like how Harman researched headphone preference. Let's see where they got.
AKG K60 Headphone Measurements
They say a picture is worth a 1000 words:
I guess their research told them the main thing we care about is 100 to 500 Hz which considering that is vocal range, maybe that makes sense.
I am ignoring the bass distortion as that is high due to lack of output:
Take caution in looking at absolute distortion levels when the response is not flat:
Group delay is bizarre:
Impedance is quite high:
Sensitivity is slightly better than average:
AKG K60 Listening Tests
Listening to my first track, produced the muffled, "closed in a box" sound that you would expect. Interestingly, it was not annoying. It was a clean midrange response.
Conclusions
We have come a long way as far as knowing what a good headphone could be. Clearly a lot of bad ideas were going around decades back, even with good intentions in research and design.
------------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/