Grado Signature S550 Headphone

The Most Accessible Way Into Grado's Signature Line

The Grado Signature S550 is the newest and most approachable member of Grado's Signature Line, the brand's premium tier sitting genuinely above the entire Classic Series in overall build and refinement.

A 50mm S2 dynamic driver, the same platform found in the pricier Signature S750, is tuned specifically for the S550's Brazilian Walnut housing rather than simply shared unchanged across models.

That pairing delivers a genuinely warmer, more forgiving presentation than the aluminum-housed S750, while still genuinely preserving the speed, detail, and openness that Grado listeners have always come to expect from the brand.

Where the Walnut Housing Earns Its Keep

A 50mm Driver Tuned Specifically for Wood

Each earcup housing is individually crafted from Brazilian Walnut, with natural grain variations making every single pair genuinely one of a kind rather than mass-produced and completely identical to the next.

At 38 ohms and 112dB sensitivity, the S550 reaches a wide 6Hz to 44kHz frequency response, with driver matching held to a genuinely tight 0.05dB across every single pair that ships out the door.

A Detachable Cable, at Last

Each earcup connects via a 4-pin balanced mini XLR connector, a genuine departure from Grado's long legacy of permanently attached cables that lets you swap or upgrade as needed later.

The included Signature Silver cable is lighter, softer, and more flexible than Grado's older cables, and at just 335 grams, the S550 stays genuinely comfortable through many hours of continuous listening.

What Reviewers Are Saying

Gear Patrol found the S550's walnut-tuned driver delivers "a warmer and more forgiving character" than the S750, calling it genuinely the most affordable entry point into Grado's entire Signature series.

ecoustics.com called it "a meaningful shift in voicing for Grado," easing back from the brand's traditionally forward presentation to introduce genuine warmth and a noticeably smoother top end overall.

Who Is the Signature S550 Best For?

• You want an accessible entry into Grado's Signature Line: the S550 sits below the S750, S950, and flagship HP100 SE
• You prefer a warm, musical, fatigue-free sound: reviewers consistently describe this as more forgiving than Grado's typically forward character
• You value handcrafted quality and unique aesthetics: every pair features genuinely one-of-a-kind walnut wood grain
• You want cable flexibility for the first time at this tier: the detachable 4-pin mini XLR system lets you swap cables as needed
• You want Grado Signature warmth — the S550 is the relaxed entry to the line

How Does It Connect to Your System?

The detachable Signature Silver cable terminates in a 3.5mm mini plug with a 6.3mm adapter included, covering portable players, phones, and desktop amplifiers alike.

Optional balanced cables with 4-pin XLR or 4.4mm Pentaconn terminations are available separately, letting you match the cable to your amplifier's specific output.

Pairs Well With

What finishes the system around a Signature S550:

• Headphone amplifiers — gives the S550 more dynamic headroom and tighter bass control
• Digital-to-analog converters — dramatically improves sound quality over a device's built-in audio
• Headphone cables — the detachable 4-pin mini XLR system lets you upgrade or swap cables freely
• Headphone stands — a proper resting spot to show off that genuine walnut wood grain

Frequently Asked Questions

How does the S550 compare to the Signature S750?

Both use the same 50mm S2 driver, but the S550's walnut housing delivers a warmer, more forgiving presentation than the S750's aluminum enclosure, which leans slightly more forward.

Do I need a headphone amplifier to drive the S550?

Not strictly. At 38 ohms and 112dB sensitivity, it plays enjoyably from a phone or laptop, though a quality amplifier genuinely adds dynamic headroom and tighter bass.

Can I use a balanced cable with the S550?

Yes. The 4-pin balanced mini XLR connectors support optional balanced cables with 4-pin XLR or 4.4mm Pentaconn terminations, sold separately from Grado.

Is every pair really unique?

Yes. Because the housings are crafted from real Brazilian Walnut, natural grain variations mean no two pairs ever look exactly the same as each other.

What does open-back mean for everyday use?

Sound leaks freely in both directions — people nearby hear your music, and outside noise comes in. Reserve these for quiet home listening, not a commute.

What comes in the box?

The S550 headphone with Brazilian Walnut housings, the detachable Signature Silver cable, a 6.3mm adapter, and B cushions already installed.

See It in Action

Taps Das presents Grado Signature S550 review.

AV Atmos presents Grado Signature S550 Open-back Headphone Debuts with new S2 Drivers with a Brazilian Walnut housing.

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Learn More

Want to learn more about open-back headphones, headphone amplifiers, or how wood housing materials shape sound? Visit our Learning Center for guides, tips, and expert advice.