Fostex · Official replacement (OEM)
EX-EP-91 replacement ear pads (pair)
Verified as compatible with 2 headphone models.
Verified compatible headphones
Evidence
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fostex.jp
Fostex names EX-EP-91 as replacement ear pads for TH900mk2 and says they are exclusive to that model.
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store.fostex.jp
Fostex’s shop identifies EX-EP-91 as a two-pad replacement set for TH900mk2.
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fostex.jp
Fostex identifies TH900mk2LE as the simplified-packaging version of TH900mk2 and names EX-EP-91 as the TH900mk2 replacement pad in its FAQ. Together, Fostex’s own product information supports this OEM pad for the target.