Grado Signature S550 Headphone (B-Stock, Factory Refurbished) headphone proprietary 2-pin The independent rear acoustic chamber

The independent rear acoustic chamber design makes channel matching to be more consistent

and the digital direction is to turn off the gain

Hugo HF+ (High Frequency roll off) (Green)

Diaphragm: Berylium-Coated Dome+PU Suspension Ring

Beat FX section A Beat FX section with the same feel as the DJM Series

Grado Signature S550 Headphone (B-Stock, Factory Refurbished) headphone proprietary 2-pin The independent rear acoustic chamberThe 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