Beyerdynamic · Official replacement (OEM)
EDT 770 S — softskin ear pad set, closed (black)
Verified as compatible with 2 headphone models.
Evidence
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beyerdynamic.de
Beyerdynamic’s product page identifies EDT 770 S as an ear-pad set, explicitly lists DT 550 under “Fits,” and gives article number 904783. It also says foam pads are included.
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europe.beyerdynamic.com
The English-language official page independently lists DT 550 as compatible and identifies the product as a closed softskin ear-pad set, article number 904783.
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north-america.beyerdynamic.com
Beyerdynamic’s EDT 770 S product page identifies the product as a black softskin closed ear-pad set, gives article number 904783, and explicitly lists DT 770 PRO X Limited Edition under “Fits.”