JA-0506B
| Brand | Yamaha |
| Manufacturer | Nippon Gakki Co. Ltd. |
| Function | Speaker |
| Produced | 1973 |
| Country | Japan |
| Form Factor | Part |
| Signal Path | Passive Hardware |
| Dimensions | 64 × 64 × 86.7 cm (W × H × D); 7.8 × 7.8 × 8.7 cm (W × H × D) |
| Weight | 1.3kg |
| Frequency Response | 2.4kHz-20kHz |
| Type | Horn |
| Impedance (Nominal) | 8Ω |
| Resonant Frequency (Fs) | 2.4kHz |
| Crossover Frequency | 4kHz |
| Sensitivity | 115dB/W/m |
| Diaphragm Material | Duralumin |
| Voice Coil Diameter | 23mm |
| Diaphragm Thickness | 30µm |
| Horn Material | Resin-molded |
| Magnetic Material | Alnico |
| Flux Strength | 17,000 Gauss |
| Total Magnetic Flux | 24,600 Maxwell |
| Power Handling | 20W |
| MSRP (1973) | ¥8,000 |