Beyerdynamic · Official replacement (OEM)
EDT 770 V SET — ear pad set, velour, closed
Verified as compatible with 1 headphone model.
Verified compatible headphones
Evidence
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global.beyerdynamic.com
Beyerdynamic’s pad page explicitly says EDT 770 V fits MMX 300 and MMX 300 (2nd Gen).
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north-america.beyerdynamic.com
The official product page identifies the target as the wired MMX 300 (2nd Generation), article no. 718300, and lists EDT 770 V SET among its accessories/spare parts.