Grado Signature S550 Headphone (Open Box) desktop A breakthrough core technology developed

A breakthrough core technology developed by HIFIMAN and the first of its kind in headphone application

Frequency response

Ergonomics Neck hanging design

Mains electricity

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Grado Signature S550 Headphone (Open Box) desktop A breakthrough core technology developedThe Grado Signature S550 brings the core values of the Signature Line into a more streamlined and approachable form. Designed for listeners who value musical engagement as much as technical performance, the S550 delivers clarity, balance, and energy in a headphone built for long, immersive listening sessions. At its heart, the S550 is tuned to preserve the immediacy and openness Grado is known for, while offering a refined presentation that remains