Dekoni Choice Suede replacement earpads for the Sennheiser HD6XX Series
Dual Senn. 2-pin headphone cable for HD Series (600, 6XX, 58x & more) – Hart Audio Cables
HD 600 – Sennheiser
Sennheiser HD600 Open Dynamic Hi-Fi / Professional Stereo Headphones
Sennheiser HD600 Open Dynamic Hi-Fi Professional Stereo Headphones
Original Sennheiser Hd600 Earphone Over-ear Wired Portable Headset With Microphone Sport Noise Reduction Gaming Headphone For Pc - Earphones & Headphones - AliExpress