| Model | ST-S505 |
| Year | 83 |
| Analog digital | D |
| Mono sensitivity | 10.8 |
| Capture ratio | 1.0 |
| Selectivity | 55/25 |
| Mono signal strength | 18.1 |
| Stereo signal strength | 38.1 |
| Separation | 60 |
| Stereo harmonic distortion | 0.04/0.05 |
| S/N ratio mono / stereo | 78/70 |
| Weight | 5.3 |
| Price | no data |