Good News , TAD Electronics all are Double isolated (Class II appliance) and connecting Class I phonostage (from other brands like Vitus) to TAD is not a good solution.
Class I electronics equipments have earth wire (3 pin AC plug) and Class II equipments have no earth wire (2 AC plug).
It means Class I products connect to wall earth but Class II products are isolated from wall earth wire.
totally I guess TAD Class II design is better for sound specially in dynamics.
What a load of BS & demonstrates your complete lack of knowledge of 100/110 volt in Japan/US versus 220/240 volt in Europe/Pacific - sigh...