Brainwavz · Aftermarket replacement
Hybrid Earpads for Sennheiser HD598 (CS/SE/SR) and other listed models
Verified as compatible with 1 headphone model.
Verified compatible headphones
Evidence
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brainwavzaudio.com
Brainwavz explicitly lists HD598 (CS/SE/SR), describes the pads as thicker than stock, and states they use a clip-on installation.