Grado Signature S550 Headphones

The Grado Signature S550 Headphones continue the brand’s tradition of careful refinement and thoughtful design evolution. Developed as part of the Signature Line, the S550 combines proven driver technology, premium natural materials, and meticulous acoustic tuning to create a headphone with its own unique sonic identity.

Designed for listeners who appreciate warmth, openness, and clarity without listening fatigue, the S550 delivers a relaxed yet highly engaging presentation. While offering a smoother and more forgiving character, it retains the speed, detail, and immediacy that have defined the renowned Grado sound for decades.

This balance makes the S550 ideal for long listening sessions, whether enjoying delicate acoustic recordings or dynamic modern productions, delivering musical realism and emotional engagement in equal measure.

Precision Performance with the S2 Dynamic Driver

At the heart of the Grado Signature S550 Headphones lies the 50mm S2 dynamic driver, carefully tuned to work in harmony with the headphone’s wooden enclosure. Rather than introducing an entirely new driver architecture, Grado focused on refining the relationship between the driver and the housing to maximise performance.

This deliberate tuning approach results in a sound signature that is both rich and detailed while remaining smooth and natural. The S550 offers a spacious soundstage with excellent imaging accuracy, allowing instruments and vocals to be clearly positioned within the listening space.

Fast transient response ensures musical passages remain lively and articulate, while the slightly warmer tonal balance provides a more relaxed presentation that encourages extended listening without sacrificing clarity or precision.

Brazilian Walnut Housing for Natural Acoustics

The Grado Signature S550 Headphones feature beautifully crafted housings made entirely from Brazilian Walnut, continuing Grado’s long-standing tradition of using natural wood as an acoustic material. Each housing is individually manufactured, meaning the natural grain pattern varies from pair to pair, giving every set a unique visual character.

Walnut is selected not only for its aesthetic appeal but also for its acoustic properties, contributing to the headphone’s fuller and more balanced tonal presentation. Its density helps control resonances while maintaining consistent acoustic performance over time.

In addition, the wood used for the S550 is sourced with consideration for sustainable forestry practices, helping ensure responsible material use while preserving the natural resources that contribute to the headphone’s distinctive sound.

Detachable Cable System for Greater Flexibility

To enhance usability and long-term versatility, the Grado Signature S550 Headphones feature a detachable cable system. Each earcup is fitted with a 4-pin balanced mini XLR connector, allowing compatibility with Grado’s growing range of interchangeable cables. The included Signature Silver cable has been designed to be lighter, softer, and more flexible than previous Grado cables, improving comfort during extended listening sessions.

At the source end, the cable is terminated with a 3.5 mm mini plug and includes a 6.3 mm adapter, ensuring compatibility with a wide variety of audio equipment including portable players, headphone amplifiers, and hi-fi systems. Additional cable options with alternative lengths or balanced terminations are available separately, allowing users to customise their setup according to their preferred listening equipment.

Comfort, Fit and Personalised Listening

Comfort plays a crucial role in the design of the Grado Signature S550 Headphones. They are supplied with Grado’s new B Cushions, which provide a balanced combination of comfort, ventilation, and acoustic performance. The headphones also remain compatible with the full range of Grado ear cushions, allowing listeners to adjust both comfort and sonic presentation to suit personal preference.

The Signature headband assembly integrates a flexible metal support within a premium leather strap, enabling users to gently adjust the fit for optimal comfort. This design allows the headphones to adapt naturally to different head shapes over time. Additional features such as engraved metal gimbals, stainless-steel height rods, reinforced junction blocks, and controlled housing rotation ensure durability and stability during long listening sessions.

High-Performance Specifications and Build Quality

The Grado Signature S550 Headphones combine refined engineering with robust construction to deliver exceptional performance. Operating on an open-air dynamic principle, they provide an expansive and natural soundstage that enhances musical realism. The 50mm drivers offer a wide frequency response from 6 Hz to 44 kHz, delivering deep bass extension and detailed high frequencies.

With a nominal impedance of 38 ohms and a sensitivity of 112 dB, the S550 can be driven effectively by a wide range of audio sources while still benefiting from high-quality amplification. Total harmonic distortion remains extremely low at less than 0.2% at 100 dB, ensuring clean and accurate reproduction. Weighing approximately 335 grams without the cable, the headphones strike a balance between solid build quality and comfortable long-term wear.