| Modello | Frequenza delle vibrazioni 1 | Frequenza delle vibrazioni 2 |
|---|---|---|
| VMT500K | 50 Hz | 55 Hz |
| VMT500 | 50 Hz | 55 Hz |
| VMT480K | 50 Hz | 55 Hz |
| VMT480 | 50 Hz | 55 Hz |
| VMT400K | 55 Hz | |
| VMT400 | 55 Hz | |
| VMT390K | 55 Hz | |
| VMT390 | 55 Hz | |
| VMT280 | 58 Hz | |
| VMT270 | 58 Hz | |
| VM46D | 32 Hz | |
| VM280 | 3480 Hz | |
| VM200D | 29 Hz | 35 Hz |
| VM166D | 29 Hz | 35 Hz |
| VM146D | 29 Hz | 35 Hz |
| VM132D | 29 Hz | 36 Hz |
| VM115D | 31 Hz | 36 Hz |