Grado Signature S550 Headphones Review: Smooth, Dynamic, and Unmistakably Grado
Read Time: Approx. 11 min.
TL;DR:
- The S550 is the fourth and most approachable headphone in Grado's Signature Line
- It delivers a smooth, musical, and dynamic sound with punchy bass and an energetic midrange
- Brazilian Walnut housing gives each pair a one-of-a-kind look and contributes to the relaxed, stable presentation
- The detachable Signature Silver headphone cable and compatibility with Grado's full cushion lineup add versatility
- It's the ideal entry point into the Signature Line for listeners who want high-end Grado performance without climbing to the S950's price tier
The Signature Line's Most Approachable Entry Yet
Grado Labs. A hi-fi manufacturer that needs no introduction is making waves again with another exciting release in its Signature Line. At $995, the Signature S550 Headphones are the fourth headphone to join the series alongside the S750, S950, and HP100 SE.
The Signature Line has quickly become one of the most compelling collections in Grado's catalog. Each model builds on the legacy of the Grado house sound while pushing into new sonic territory–smoother, more refined, and more versatile than ever. With the S550, Grado is making a strong case that you don't have to climb to the top of the lineup to get a premium listening experience.
It borrows some of its best qualities from the Signature S950 Headphones–including the stunning Brazilian Walnut housing–while carving out its own identity with a more energetic and dynamic midrange. It's musical, smooth, and engaging while maintaining the immediacy, openness, and detail retrieval that so many audiophiles know and love from Grado.
PROS
- Musical, dynamic, and detailed sound with a punchy bass response
- Detachable headphone cable for effortless upgrading down the road
- Comfortable yet secure, snug fit
CONS
- Headband cushioning is minimal. May not be padded enough for some
Design
In a market saturated with manufacturers trying to outperform each other, you've got to have an edge—a way to stand out. Grado Labs set the precedent for "edge" by handcrafting each high-end headphone with unique elements like wooden ear cups and extra-cushy ear pads. The S550 closely resembles the Signature S950 Headphones, but with two clear distinctions: the Grado logo is placed clearly in the center of the ear cup grilles, and it comes fitted with Grado's B cushions instead of the G and F cushions included with the S950.
When the S950 came out, it was the first Grado headphone to use Brazilian Walnut for its housing. In my review of the S950, I went so far as to say that I hope this wood becomes a part of the rotation for future models. Well, Grado must have been reading because the S550 is officially the second Grado headphone to use Brazilian Walnut for its housing! Brazilian Walnut is not only beautiful, but it's known for its density and resistance to decay, delivering a relaxed, musical presentation and stability.
I'm a big fan of Grado's choice to use wooden housings on most of their headphones. The wood grain on each headphone is never identical, which is something truly special. Alongside being handcrafted, you can pretty much guarantee that your model is one-of-a-kind. Compared to the metal housings used on the HP100 SE and S750, the sonic results of Brazilian Walnut are very clear.
The overall design of the S550 follows suit with the S950, sporting sleek black accents to complement the deep, rich brown tones of the Brazilian Walnut. The headband, while it doesn't have a lot of cushion and doesn't feel extra padded, is surprisingly comfy. Looks can be deceiving, and that's the case with Grado's headband design. On the side of the headband, you'll find self-adjusting tension rods that are stiff enough to stay in place while you're wearing them, but easy enough to slide up and down for quick adjustments.
Between the headband, ear cup design, ear pads, and adjustable height rods, the Signature S550 is the perfect weight and fit. From the wise words of Baby Bear, "Not too hot. Not too cold. Just right." If the headband feels too tight at first, know that it'll stretch out over time to the perfect clamping force. But if they don't or you just can't wait, Grado says you can stretch them yourself by gently pulling at the ends of the headband to open them slightly. Keep in mind not to overstretch the headband though!
The headphones come with Grado's B ear pad cushions, a newer design that offers a balance of comfort, support, and acoustic performance. They'll provide a natural presentation that works across a wide range of genres, and if you're looking to upgrade those cushions down the line, you're in luck. The S550 is compatible with Grado's S, F, L, and G cushions, which each subtly influence both comfort and sound quality. The B cushions are firm enough to provide support and a nice sense of isolation while being comfortable and breathable enough to wear for extended periods of time.
As many of you may already know, Grado Headphones didn't always have a detachable headphone cable. That was a point of contention for some listeners who desired a cable upgrade, and Grado must have heard the qualms, because the Signature Line is the first collection to feature their detachable cable system. The included cable features a 3.5mm termination with 3-pin mini XLR connectors. A 6.3mm adapter is included for those who need it, which is a nice perk when bouncing between portable gear and larger stereo components. A 4.4mm termination is also available for those seeking a balanced connection to their favorite hi-fi gear.
Sound
Historically, Grado Headphones have been prized for their natural, detailed, and "up-front" sound quality, which complements many genres but favors classical, acoustic, and jazz genres. While this evolves by model and price tier, the Classic and Prestige series are the ones most associated with the Grado house sound. But when Grado released the HP100 SE, the first headphone in its Signature Line, Grado took a step in a new direction. Aside from the new physical attributes, the Signature Line models stand out for their smooth, balanced, and refined sound quality. New driver designs and tuning greatly contributed to this "next generation" sound, and with each new model released in the line, it keeps getting, sweeter.
The S550 closely follows suit with its siblings, delivering a smooth, balanced, and breathtakingly musical sound. It has the immediacy and openness of a Grado headphone. The presentation is airy and natural with an intimate soundstage. When I hit shuffle on my playlist, one of the first tracks to pop up was Imma Be by The Black Eyed Peas. Anyone familiar with this song knows it's pretty bass-heavy with a clear thump throughout the entire track. I was caught off guard when the S550 articulated that thump clearly and with a surprising amount of energy. There's a clear low-end presentation that's quick and punchy. Now, it doesn't have that deep sub-bass rumble you get from a closed-back headphone, but it's got enough mid-bass presence to articulate the low-end nicely. I wouldn't go as far as to say these are the headphones for the person who solely listens to bass-heavy tracks, but it does justice for rock, pop, and any other genre with some low-end reproduction.
Chains of Love by Charli XCX is the breakout track on the Wuthering Heights soundtrack that's been circulating the internet for the last few months. It starts soft and quickly escalates into a crescendo that's the chorus. Charli XCX has an impressive vocal range, and the emotion she conveys throughout the song is one of the reasons why it's so intoxicating and popular. The S550 does it justice, reproducing the chorus with a lot of energy without sacrificing musicality and emotion. Detail retrieval is top-tier, and I wasn't expecting anything less from a Grado Headphone.
Compared to the Signature HP100 SE Headphones, the S550 stands out for its bass response, dynamic range, and warmer, more musical presentation. The HP100 SE is more neutral with a wider soundstage and a smooth midrange. The S550 and Signature S950 Headphones are the most similar to each other, though the S950 is slightly more resolving and relaxed. The S550, by contrast, brings more energy and dynamics to the midrange.
Mount Everest
By Labrinth
(Imagination & the Misfit Kid)
Chains of Love
By Charli XCX
(Wuthering Heights)
Cinnamon Girl
By Lana Del Rey
(Norman F***ing Rockwell!)
August
By Taylor Swift
(Folklore (Deluxe Version))
Features
- 50mm S2 dynamic driver tuned specifically for its all-wood enclosure, delivering warmth, speed, and detail
- Brazilian Walnut housings are individually crafted — unique grain patterns ensure no two pairs are identical
- Wide, open soundstage with precise imaging and natural dynamics for fatigue-free, extended listening sessions
- Detachable Signature Silver cable — lighter, softer, and more flexible than previous Grado cables
- 4-pin balanced mini XLR housing terminations for compatibility with Grado's expanding cable ecosystem
- Compatible with the full Grado cushion lineup for personalized comfort and sonic tailoring
- Signature leather headband with integrated flexible metal support for a custom, adjustable fit
- Engraved metal gimbals, stainless-steel height rods, and reinforced junction blocks for lasting durability
At the heart of the S550 sits a newly engineered 50mm S2 dynamic driver, developed to deliver a balanced and engaging presentation while preserving the speed and clarity that define Grado's house sound. It's no secret that Grado likes to keep their driver designs and details under wraps, but what we do know about the Signature S550 drivers is this:
"Every element of the driver assembly has been carefully considered, allowing the S550 to reproduce fine detail and natural dynamics without sacrificing musical flow. By focusing on control, responsiveness, and tonal accuracy, the S550's driver delivers a sound that feels immediate and open, yet remains composed across a wide range of recordings." – Grado Labs
I'd say that Grado has successfully achieved their goals with the S550. It handles demanding passages with ease, reproduces fine details and nuances, and complements a wide range of genres.
Dragon Cables
[Bronze Dragon Premium Headphone Cable]
Ever since the release of our Bronze Dragon Premium Headphone Cable, I've had a hard time parting ways with it. It delivers the best of both worlds: fine details and resolution, and warmth and musicality. The sonic qualities of the S550 are strikingly similar to the Bronze Dragon. So much so that it's almost as if they were destined to be together from the start.
The Bronze Dragon will enhance the S550's lifelike musicality, adding warmth to clinical-sounding tracks and a touch more bottom-end weight to those bass-heavy tracks.
Our HiFi Audio Dragon Cables bring out more of what you love in your music and audio gear. If you love your headphones but wish they had a bit more top-end sparkle - a Silver Dragon Headphone Cable would be a great option. If your USB cables keep dying - as many stock cables do - then check out our quality USB Audio Cables. We say time and time again that materials matter, and our audio cables and custom geometries actually help to bring out those desired properties in your gear and music. We make tons of custom options for our customers so that you can get the right HiFi Audio cable for your exact needs. If you have any questions feel free to Contact Us and we'll be more than happy to help.
Verdict
The Grado Signature S550 Headphones are an easy recommendation. It delivers a level of musicality, craftsmanship, and detail retrieval that you'd expect from a flagship headphone, but for a fraction of the price. What makes the S550 special is how well-rounded it is. You get the smooth, refined character that defines the Signature Line, but with enough midrange energy and dynamics that will leave you questioning how this was possible in an open-back design.
The bass response is punchy and articulate. Detail retrieval is excellent, and the overall presentation is natural and musical without ever feeling sterile. It handles everything from today's pop hits and country tracks to acoustic, classical, and jazz. Pair that with our Bronze Dragon Premium Headphone Cable for added warmth, musicality, and body, and there's not much the S550 can't do.
If you already own the Signature S950 Headphones and love them, the S550 isn't here to replace them–it's a slightly different flavor with more midrange presence and punch. But if you're looking for your entry-point into the Signature Line, or you want a versatile headphone that handles virtually anything you throw at it, the Signature S550 is a fantastic place to start. Grado Labs keeps raising the bar, and the S550 is proof that the Signature Line is only getting better.
Featured Products
Related Videos
Grado S950 Review: The Warmer Open-Back Signature Series Headphone
Exploring Grado's S950 & HP100 SE Headphones with Rich Grado
Grado HP100 SE: The $2,495 Anniversary, Flagship Headphone Reviewed
What's in the Box
- Grado Signature S550 over-ear headphones
- Signature Silver detachable cable (3.5mm terminated)
- 6.3mm adapter
- B Cushion earpads pre-installed
Specifications
PHYSICAL SPECIFICATIONS
Weight: 335g (without cable)
Housing: Brazilian Walnut
Earpad Supplied: B Cushion
TECHNICAL SPECIFICATIONS
Transducer Type: Dynamic
Operating Principle: Open Air
Driver Size: 50mm
Driver Matching: 0.05 dB
AUDIO SPECIFICATIONS
Frequency Response: 6Hz - 44kHz
THD: <0.2% at 100 dB
SPL 1mW: 112 dB
Nominal Impedance: 38 ohms
CONNECTIVITY SPECIFICATIONS
Cable Type: Signature Silver detachable
Headphone Connection: 4-pin Mini XLR
Source Connection: 3.5mm with 6.3mm adapter included
