Grado Signature S550 Headphone (B-Stock, Factory Refurbished) OPEN-BOX 0007% (Balanced 2

0007% (Balanced 2

ensuring the S750 captures the detail and character of every performance while offering a uniquely engaging listening experience

Open-Professional Parametric Equalizer

and power sections are physically separated to prevent mutual interference

Grado Signature S550 Headphone (B-Stock, Factory Refurbished) OPEN-BOX 0007% (Balanced 2The 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