Grado Signature S150 – New Open-Back HiFi Headphones with 44 mm S Driver, Detachable Cables and Revised Design
The Grado Signature S150 is an open-back dynamic headphone built around a new 44 mm S driver with a paper-composite diaphragm, derived from the technology of Grado's larger Signature models. It weighs just 220 g, ships with the detachable Signature Bronze cable and wears a one-piece matte black ABS housing with a freshly engineered headband. Our editorial take is that the S150 is more than a cut-price entry ticket: the thought that has gone into its mechanics may matter in daily use as much as its sound.
- With the Signature S150, Grado Labs introduces an open-back, 220 g headphone that uses a new 44 mm S driver, a detachable Signature Bronze cable, a leather-padded headband with adjustable clamping force and interchangeable F-Cushion ear pads. Pre-orders are open at a recommended US price of $ 295,-, with first deliveries expected in early November 2026 and European pricing still to be confirmed.
For years, the Grado Signature Line has been the preserve of serious music lovers prepared to spend heavily on a high-quality open-back headphone. The new Grado Signature S150 is the clearest attempt yet by Grado Labs, the long-established, family-run American company based in Brooklyn, to lower that barrier. Yet price is only part of the story. The S150 is a technically distinct design that borrows key ideas from the current Signature range and adds a new housing, a purpose-built driver and a long list of ergonomic and practical improvements.
Key Facts Grado Signature S150
- Open-back dynamic headphone from the Grado Signature Line
- Newly developed 44 mm S driver with a paper-composite diaphragm
- Frequency response of 16 Hz to 34 kHz
- 38 ohm impedance and 104 dB SPL sensitivity at 1 mW
- New one-piece ABS polymer housing in matte black
- Detachable Grado Signature Bronze cable, terminated with 3,5 mm connectors at the headphone end
- Leather-padded headband with adjustable clamping force
- Weighs only 220 g
- Replaceable Grado F-Cushion ear pads
- Expected to launch in early November 2026
Where the S150 sits in the Grado line-up
The S150 occupies an unusual position in Grado’s catalogue. It is meant to deliver construction and sonic traits that until now belonged to considerably more expensive models, but it does so with a deliberately simple, light build. Its driver draws on technology found in the larger Grado Signature HP100 SE and Grado Signature S950, and the ability to swap the cable, once a feature of dearer models, is now part of the plan at this price.
The approach reflects a wider shift in wired high-end headphones. A pair is no longer expected to impress with its acoustics alone; it should also be durable, adaptable and comfortable to live with.
Open-back by design
Like many of the American specialist’s classic models, the Grado Signature S150 is fully open. Air can move almost freely on both sides of the diaphragm, which underpins the acoustic behaviour Grado is aiming for. The company promises a transparent, detailed presentation in which fine musical structures stay audible and voices and instruments keep their substance.
There is a trade-off, as there always is with open designs: very little sound is kept out, and very little is kept in. The S150 is therefore best suited to relaxed listening in quiet surroundings, whether at a home HiFi system or on a good headphone amplifier.
A new 44 mm S driver
The heart of the headphone is a dynamic 44 mm S driver developed specially for this model and making its debut here. Its diaphragm is made from a paper-composite material whose technological basis comes from the larger 52 mm S drivers in the Grado Signature HP100 SE and Grado Signature S950. To suit the smaller diameter, the design had to be adapted. According to Grado Labs, engineers concentrated on how different diaphragm materials interact, on the magnetic properties of the drive unit, and on how both shape the sound.
The aim was to combine high resolution and transparency with a full-bodied, natural tonal balance. In the bass in particular, Grado promises a presentation that is unusually substantial for an open headphone, with precise definition and convincing presence.
On paper, the S150 offers a frequency range of 16 Hz to 34 kHz, a nominal impedance of 38 ohms and a sensitivity of 104 dB SPL at 1 mW. Those figures suggest it should work with many good portable audio players, not just desktop equipment.
Detachable cables as standard: Grado Signature Bronze
One of the most welcome changes concerns the cable. The headphone comes with the new Grado Signature Bronze cable, part of the manufacturer’s latest generation of detachable connection solutions. Compared with earlier cables, it is said to be markedly lighter, softer and more flexible, which should ease the mechanical strain a stiffer lead can place on the wearer.
The cable plugs into each earcup via a 3.5 mm connector, and its routing can be adjusted to taste, something that helps during longer listening sessions. At the source end it terminates in a 3.5 mm stereo mini-jack, and a 6.3 mm stereo adapter is included. Buyers can also specify alternative cable configurations when ordering, so the headphone can be matched to different source devices and connection needs.
A revised headband for greater comfort
Grado Labs gave the mechanical design just as much attention. At 220 g, the Signature S150 is among the notably light HiFi headphones in its class.
The newly developed Signature headband has a padded leather cover intended to spread the weight as evenly as possible, and a flexible steel band inside lets users adjust the clamping force within certain limits. Other mechanical parts have been reworked too. Redesigned matt black polymer yokes, stainless-steel height-adjustment rods and reinforced joints are meant to improve stability while allowing precise fitting to different head shapes. The earcups’ range of movement is deliberately restricted to avoid needless twisting, without taking away the flexibility needed for a good fit.
Grado Labs also intends to sell the new headband separately as an accessory. Owners of compatible older models will be able to upgrade the comfort and mechanics of the headphones they already have.
Matte black, one-piece housing
Visually, the Signature S150 is unmistakably a Grado, yet its housing has been fundamentally reworked. For the first time on this model, the acoustic body is a single piece, made from a specially selected ABS polymer chosen for its combination of low weight, mechanical strength and dimensional accuracy.
The matte black finish gives the headphone a restrained, contemporary look. Grado deliberately avoids elaborate decoration and opts for a functional design that preserves the brand’s recognisable character. The new housing matters for more than appearance: its mechanical properties and geometric consistency play an important part in achieving a repeatable acoustic tuning.
Grado F-Cushions: ear pads as part of the tuning
The S150 comes fitted with Grado’s F-Cushions as standard. These pads have special internal acoustic slots that influence airflow and so contribute to the intended sound character. They are explicitly part of the headphone’s overall acoustic tuning, as their construction affects, among other things, the distance between driver and ear and the way sound is guided immediately in front of the diaphragm.
The S150 is also compatible with the full range of Grado ear pads. Swapping them lets owners adjust not only comfort but also, quite deliberately, the tonal presentation.
All Benefits at a Glance
- A driver with flagship lineage: the purpose-built 44 mm paper-composite S driver takes its cues from the technology of the higher-ranking Signature models.
- Open-back design: the construction is geared towards transparent, spacious music reproduction.
- Cable you can change: the Grado Signature Bronze lead can be swapped when your needs change.
- Featherweight: at only 220 g, it is well suited to extended listening.
- Better ergonomics: the padded leather headband and adjustable clamping force allow a personal fit.
- New housing: the one-piece ABS polymer shell pairs low weight with mechanical stability.
- Interchangeable pads: different Grado cushions let you tailor both comfort and sound.
- An attractive way in: the S150 brings key features of the Signature Line within reach at a much lower price.
Price and Availability
According to Grado Labs, the Grado Signature S150 can already be pre-ordered, with the first deliveries due in early November 2026. In the United States, the manufacturer quotes a recommended retail price of US$ 295,-. An official price recommendation for Austria, Germany and Switzerland has not yet been issued.
Conclusion
With the Grado Signature S150, Grado Labs shows, welcomely, that progress in its high-quality headphones need not be confined to ever higher price brackets. What stands out is that the cheapest model in the Signature Line has not been given a stripped-down design. Instead it receives its own new driver, detachable cables and a thoroughly reworked mechanical package. The latter may prove at least as important in everyday use as the sonic qualities Grado is aiming for. It is an enticing newcomer that could open the Grado Signature Line to a far broader audience.
| Product | Grado Signature S150 |
|---|---|
| Price | US$ 95,- |
Technical Specifications
| Product | Grado Signature S150 |
|---|---|
| Design | Open, dynamic |
| Driver | 44 mm S driver |
| Diaphragm | Paper-composite material |
| Frequency response | 16 Hz to 34 kHz |
| Impedance | 38 ohms |
| Sensitivity | 104 dB SPL at 1 mW |
| Distortion | Less than 0.3% at 100 dB |
| Driver matching | 0.05 dB |
| Cable | Grado Signature Bronze, detachable |
| Headphone connectors | 2 × 3,5 mm |
| Source-side connector | 3,5 mm stereo mini-jack |
| Adapter | 6,3 mm stereo jack |
| Ear pads | Grado F-Cushions |
| Headband | Padded leather headband, adjustable clamping force |
| Housing material | ABS polymer |
| Finish | Matte black |
| Weight | 220 g |
| Brand | Grado Labs Inc. |
|---|---|
| Manufacturer | Grado Labs Inc. |
| Distribution | Grado Labs Inc. |
| More about this manufacturer at HiFi BLOG |
