Headphones — Grado Labs Signature S550

The Signature S550 is an open-back over-ear headphone from Grado Labs, sharing the brand's storied dynamic-driver heritage with versatile dual-connector cable termination. The Signature S550 brings Grado's most storied engineering heritage to a serious open-back over-ear format.

Key specs that matter

Frequency response spans an exceptionally wide 6Hz to 44,000Hz within plus-or-minus 10dB. Connection offers a versatile choice of 4-pin mini-XLR or 3.5mm jack termination. Sensitivity is an extraordinary 112dB SPL at 1kHz/1mW, with impedance at 38 ohms. Weight is 335g.

Sound and use context

Expect the accurate, historically celebrated character Grado's broader storied American catalogue is celebrated for, with the extraordinary 112dB sensitivity meaning this headphone reaches satisfying volumes readily from virtually any source.

Pairing

The versatile dual-connector termination and extraordinary 112dB sensitivity make the Signature S550 compatible with a wide range of sources, including portable devices.

Alternatives

Grado's own Signature HP100 SE offers a related flagship-tier alternative within the same broader headphone catalogue.