Introduction
Grado's Signature Line has always started well north of a thousand euros. The Signature S150 changes that. Grado calls it the "most accessible entry" into the line, and it's the first Signature model priced closer to the Prestige Series than to the S550.
The interesting part is the driver. Instead of reusing an older Prestige unit, Grado built a new 44 mm S driver with a paper-composite diaphragm based on the 52 mm drivers in the S950 and HP100 SE. It sits in an all-new single-piece housing with matte-black gimbals, stainless-steel height rods and a padded leather headband, and the whole thing weighs 220 g.
Where it doesn't stretch: this is an open-back, on-ear headphone with flat F cushions. It leaks sound, it isolates you from nothing, and on-ear pressure is a matter of taste. Grado's bigger L and G cushions fit, but they're sold separately.
Watch It in Action
Grado's own walkthrough of the S150:
Key Features & Benefits
- Flagship driver thinking at a lower price: the new 44 mm S driver borrows its paper-composite diaphragm from the S950 and HP100 SE.
- Easy to drive: 38 Ω and 104 dB sensitivity, so a desktop DAC/amp or a good portable player is enough.
- Light for long sessions: 220 g with a padded leather Signature headband.
- Cable you can replace: detachable Signature Bronze cable on dual 3.5 mm sockets, with a 6.3 mm adapter in the box.
- Tune it with cushions: ships with F cushions and takes Grado's full range of replacement cushions.
Real-World Reactions
"That's the kind of neighborhood improvement I can get behind."
Ian White, ecoustics
"The real test will be whether Grado can translate those advances into a genuinely competitive $295 headphone."
Ian White, ecoustics
Fair point, and it's ours too. Full reviews aren't out yet. On paper, a Signature-derived driver, a detachable cable and a 220 g build make a strong case at this price. We'll know more once we've had a pair on our own heads.
Gallery
Every angle in one place. Click any shot to open it full size.
Who It's For
Listeners who want the Grado sound in a lighter, easier-to-drive package: desktop setups, first serious headphone upgrades, and anyone who's been eyeing the Signature Line but not its prices.
Who should look elsewhere: if you listen on the train, in an open office or next to someone sleeping, an open-back on-ear is the wrong tool. Look at closed-back designs instead.
Quick Specs
- Type: Open-back, on-ear, dynamic
- Driver: 44 mm S driver, paper-composite diaphragm
- Frequency response: 16 Hz – 34 kHz
- Impedance: 38 Ω
- Sensitivity: 104 dB (1 mW)
- Cable: Signature Bronze, detachable, dual 3.5 mm, 3.5 mm plug + 6.3 mm adapter
- Cushions: F cushions
- Weight: 220 g
Pros & Cons
✅ Pros:
- Signature Line driver technology at the lowest price in the range
- Light 220 g build
- Easy to drive from modest sources
- Detachable cable and full cushion compatibility
⚠️ Cons:
- Open-back: leaks sound, no isolation
- On-ear F cushions won't suit everyone
Where to Buy
The Grado Signature S150 is open for pre-order at Soundium at €379, with first units expected in November.
- Free pickup shipping on orders over €149
- Free courier shipping on orders over €299
- Secure checkout and interest-free payments
- Support from people who actually know the gear
Pre-order the Grado Signature S150 from Soundium
Final Thoughts
If you want the full Signature experience, the S550 and up still go further. If you want to hear where Grado's newest driver thinking is heading without spending four figures, the S150 is the one to watch at €379.
Still Unsure?
Not sure an open-back Grado fits your setup? Reach out to our team and we'll help you find the right match.