solderdude
Grand Contributor
btw, if I'm not mistaken. The same or a very similar driver is also used in the HD58x Jubilee, which is similar again to the HD660s. All 150ohm based originally off the HD700 driver I think.
Between all the mentioned headphones there are 2 different design magnet systems/frames. The drivers, however, differ in membrane and damping. The business-end as it were, as well as the baffle and rear damping.
So the drivers may look the same but they are really different drivers.
The HD58X driver is definitely different from the HD560S so it is not the enclosure/baffle. HD560S has angled drivers, HD58X does not.
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