This is a review and detailed measurements of a Sony MDR-7506 made in Japan using "Samarium Cobalt" which is different than the neodymium magnet used laater. It is on kind loan from a member.
Naturally the headphone looks and feels the same as MDR-7506. Owner wants to know how closely it measures relative to international version so I am going to go through this review quickly.
Sony MDR-7506 Japanese Headphone Measurements
As with other variations of this headphone, measuring them is very challenging as they barely cover the artificial ear on my GRAS 45CA fixture, showing high variability below a few hundred hertz. This is the best I got:
Ignoring the bass differences, it seems that its treble response is more under control than later MDR-7506. But then again, it has a dip so may lose on spatial qualities.
Distortion is off the charts at it was for US MDR-7506:
Group delay is uneventful other than resonances:
Impedance is unchanged:
As is sensitivity:
Conclusions
High variability makes it hard to know if we have measurement differences or true technical ones. I say in treble range there seems to be a difference as varying the fit did not modify that. Since I did not listen to them, I don't have much else to offer. I let you all discuss it.
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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/
Naturally the headphone looks and feels the same as MDR-7506. Owner wants to know how closely it measures relative to international version so I am going to go through this review quickly.
Sony MDR-7506 Japanese Headphone Measurements
As with other variations of this headphone, measuring them is very challenging as they barely cover the artificial ear on my GRAS 45CA fixture, showing high variability below a few hundred hertz. This is the best I got:
Ignoring the bass differences, it seems that its treble response is more under control than later MDR-7506. But then again, it has a dip so may lose on spatial qualities.
Distortion is off the charts at it was for US MDR-7506:
Group delay is uneventful other than resonances:
Impedance is unchanged:
As is sensitivity:
Conclusions
High variability makes it hard to know if we have measurement differences or true technical ones. I say in treble range there seems to be a difference as varying the fit did not modify that. Since I did not listen to them, I don't have much else to offer. I let you all discuss it.
-----------
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/
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