| Brand | Mystery |
| Trade name | MC-640 Calypso |
| Pattern | round |
| Type | speakers 16 cm (from 150 mm to 170 mm) |
| Type acoustic | component |
| Main speaker dimensions | 160 mm |
| Number of bands | two-ways |
| Rated power (4 Ohm) | 70 |
| Maximum power | 200 W |
| Impedance | 4 Ohm |
| Sensitivity | 92 dB |
| Frequency range from | 55 Hz |
| Frequency range up to | 21000 Hz |
| Warranty / Service | 6 months |
| Price per | pair |