solderdude
Grand Contributor
The ones I measured and tested were all used models.Do we?
You seem to be convinced the memory foam is softer in revised model, according Solderdude's article it is firmer though. Since you both have measured the same difference in frequency response with softer and firmer pads, I think driver has been changed and memory foam properties are not that important.
I think Robbo9999 has bought all of his HD560S new.
The 'newer' HD560S I measured, of course, were newer (so pads did not age as much) compared to the older ones I had and bought second hand.
In one of them I even had to replace the pads because they were worn (compressed too much).
Measurements were taken using fresh pads (on the older versions).
What was clear (with experiments of swapping pads on different versions) was that the pads as well as the drivers (production spread or deliberate change) had an influence on the tonal balance, in particular the brightness.
That has also been kind of the consensus on the web. AFAIK Oratory thinks it is just production spread but I got inside intel that changes were made.
Also pads for the HD6** series has changed as well. Different foam and cloth is used.
I assume it was a financial decision in order to not increase pricing too much, along with the box it comes in and cheaper cables.
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