NS-615
| Brand | Yamaha |
| Manufacturer | Nippon Gakki Co. Ltd. |
| Function | Speaker |
| Produced | 1978 |
| Country | Japan |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 21.5 × 38.2 × 19.9 cm (W × H × D) |
| Weight | 6kg |
| Frequency Response | 60Hz-20kHz |
| Treble | 3.5cm Dome |
| Midrange/Bass | 18cm Cone |
| Sensitivity | 90dB/W/m |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 2kHz |
| Power Handling | 50W |
| Enclosure Type | Sealed |