I have not listened to these headphones. I have only been reading up on open back headphones and tracking the pricing. Just wanted to bring this offer to the attention of FMs, as this is the lowest price (for new piece) I have come across.
Yes. 599 is less muddy and fast and detailed. It a better headphone overall. 559 is like a gateway to open back. But honestly none of the sennheisers sound so „open“ compared to something like a akg k701/2