OFC USB Type C 2.5mm Nylon Braided Cable Replacement Extension Cord for Sennheiser HD 598 CS SE 558 518 599 569 579 Headphones - AliExpress
Coiled Audio Cable Replacement for Sennheiser HD599 SE HD558, HD518, ATH-M50X - 2.5mm to 3.5mm Extension Cord with 6.35mm Adapter (5ft-15ft) - Walmart.com
Bluetooth 5.0 Stereo Audio Adapter Wireless Handsfree Receiver for Sennheiser HD 598 CS SE 558 518 599 569 579 Headphones - AliExpress
Amazon.com: weishan HD598 Coiled Audio Cable Replacement for Sennheiser HD599, ATH-M50X, ATH-M70X, in-line Mic Control Headphone Cord Works on PS5 Xbox One 8ft : Electronics
Sennheiser HD 598 Review – Expendable In 2023? - Home Studio Basics
Amazon.com: Geekria Audio Cable Compatible with Sennheiser HD 599 SE, HD 599, HD 598, HD 598 SE, HD598 CS, HD 598 SR, HD 560 S, HD 400 PRO, HD 579, HD 559
Geekria Audio Cable Compatible with Sennheiser HD 599 SE, HD 599, HD 598, HD 598 SE, HD598 CS, HD 598 SR, HD 560 S, HD 400 PRO, HD 579, HD 559 Cable, 2.5mm Replacement Stereo Cord (4 ft / 1.2 m) - Yahoo Shopping
Geekria Apollo Upgrade Cable Replacement for Sennheiser HD598, HD598SE
Geekria Audio Cable Compatible with Sennheiser HD 599 SE, HD 599, HD 5