Dekoni Audio · Aftermarket replacement
Dekoni Audio replacement earpads for the Sennheiser HD 598/599, PC37X and PC38X family (styles include Choice Leather and other listed variants)
Verified as compatible with 1 headphone model.
Verified compatible headphones
Evidence
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dekoniaudio.com
Dekoni’s compatibility list includes Sennheiser Game One. The product page itself provides the more direct fit claim for this specific pad family.