NS-166
| Brand | Yamaha |
| Manufacturer | Nippon Gakki Co. Ltd. |
| Function | Speaker |
| Produced | 1983 |
| Country | Japan |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 26.8 × 47.6 × 24.3 cm (W × H × D) |
| Weight | 8kg |
| Frequency Response | 50Hz-20kHz |
| Treble | 3cm Dome |
| Midrange/Bass | 20cm Cone |
| Sensitivity | 88dB/W/m |
| Impedance (Nominal) | 6Ω |
| Power Handling | 50W |
| Power Handling (Music) | 100W |
| Enclosure Type | Sealed |