Koss SP/3
In 1958, John C. Koss invented personal listening with the world’s first SP/3 stereophone. Koss sought to replicate the excitement of a live musical performance.
| Brand | Koss |
| Model | SP/3 |
| Driver size (mm) | |
| Noise cancelling | |
| Frequency response | |
| Impedance (Ω) | |
| Battery life (hours) | |
| Bluetooth version | |
| Dust protection (IP code) | |
| Water protection (IP code) | |
| Bluetooth | |
| Height (mm) | |
| Width (mm) | |
| Depth (mm) | |
| Weight (kg) |