Fostex · Official replacement (OEM)
Fostex TH900 original earpad replacement (factory service)
Verified as compatible with 1 headphone model.
Verified compatible headphones
Evidence
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fostex.jp
Fostex’s original TH900 page says earpads are consumables and directs owners to customer service for replacement. Its FAQ says it does not sell earpads as parts and handles earpad exchange as a repair service.