Image not available$799
1 retailer
Signature S550
The Grado Signature S550 is a pair of 0.74 lb open-back headphones using 50 mm dynamic drivers, with a stated frequency response of 6 Hz–44 kHz.
- Type
- Not published
- Frequency
- 6 Hz–44 kHz
- Weight
- 0.7 lb · 335 g
- Impedance
- 38 Ω
Image not availableColor not published
What the data says
- Lighter than 100% of the 4 other headphones we list in the 39–49 kHz range.
- Lowest in-stock price is 5% below list price this week.
Computed from the specs below. How we write summaries.
Full specs
Last verified Oct 5, 2026
Unless marked otherwise, specs are from the manufacturer’s product page (gradolabs.com).
| Frequency response | 6 Hz–44 kHz |
|---|---|
| Driver | Dynamic |
| Driver size | 50 mm |
| Impedance | 38 Ω |
| Sensitivity | 112 dB SPL/1mW |
| Back | Open-back |
|---|---|
| Weight (manufacturer) | 0.74 lb (335 g) |
| Detachable cable | Yes |
| Connection | Wired |
|---|
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