Grado Signature S550 Headphone (B-Stock, Factory Refurbished) OPEN-BOX A5000 (Not compatible with A8000

A5000 (Not compatible with A8000

and power sections are physically separated to prevent mutual interference

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Ultimate individual fit

Epitome of comfort born through endless research

Grado Signature S550 Headphone (B-Stock, Factory Refurbished) OPEN-BOX A5000 (Not compatible with A8000The 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