Grado Signature S550 Headphone (B-Stock, Factory Refurbished) headphone proprietary 2-pin The BTA1 transmitter adapts automatically

The BTA1 transmitter adapts automatically to Dolby Digital or PCM/Stereo formats

All elements are industry-leading representatives of its kind – combined in a bus-powered mobile interface

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

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 BTA1 transmitter adapts automaticallyThe 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