The Grado Signature S550 Brings the core values of 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 natural and fatigue-free. From subtle acoustic details to dynamic passages, the S550 is engineered to connect you more directly to the music — not just the sound.

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Transducer Type: Dynamic
Operating Principle: Open Air
Frequency Response: 6Hz - 44kHz
THD: <0.2% @100dB
SPL 1mW: 112dB
Nominal Impedance: 38 ohms
Driver Size: 50mm
Driver Match: 0.05dB
Weight: 335g
Cable Type: Signature Silver Detachable
Headphone Connection: 4pin Balanced Mini XLR
Source Connection: 3.5mm w/6.3mm adaptor

Cushions: B Cushion

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