NS-366
| Brand | Yamaha |
| Manufacturer | Nippon Gakki Co. Ltd. |
| Function | Speaker |
| Produced | 1983 |
| Country | Japan |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 32 × 56.8 × 31.3 cm (W × H × D) |
| Weight | 14.5kg |
| Frequency Response | 45Hz-20kHz |
| Treble | 3cm Dome |
| Midrange | 4.5cm Dome |
| Bass | 25cm Spruce Fiber Cone |
| Sensitivity | 89dB/W/m |
| Impedance (Nominal) | 6Ω |
| Power Handling | 70W |
| Power Handling (Music) | 140W |
| Enclosure Type | Sealed |