NS-20M
| Brand | Yamaha |
| Manufacturer | Nippon Gakki Co. Ltd. |
| Function | Speaker |
| Produced | 1985-1989 |
| Country | Japan |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 27 × 41 × 25.5 cm (W × H × D) |
| Weight | 9.5kg |
| Frequency Response | 55Hz-40kHz |
| Treble | 1.1" Titanium Carbide Dome |
| Midrange | 1.9" Titanium Carbide Dome |
| Bass | 9" Spruce Paper Cone |
| Sensitivity | 91dB/W/m |
| Impedance (Nominal) | 6Ω |
| Crossover Frequencies | 2kHz, 10kHz |
| Power Handling (Peak) | 160W |
| Enclosure Type | Sealed |
| Enclosure Construction | Particleboard |
| Finish | Black |
| MSRP (1986) | $199 |