NS-18
| Brand | Yamaha |
| Manufacturer | Nippon Gakki Co. Ltd. |
| Function | Speaker |
| Produced | 1973 |
| Country | Japan |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 54 × 72 × 25 cm (W × H × D) |
| Weight | 18kg |
| Frequency Response | 35Hz-20kHz |
| Treble | 3" Horn (Yamaha JA-0506B) |
| Midrange/Bass | 18"x23" Polystyrene (Yamaha JA-5004) |
| Impedance (Nominal) | 8Ω |
| Power Handling | 18W |
| Power Handling (Music DIN) | 45W |
| Enclosure Type | Open Baffle |
| System Resonance | 35Hz |
| Finish | Walnut |