I don't know if there's anyone here who can accurately answer your questions, but I'm sure Vintech could.

You can contact them directly:

Vintech Audio
Phone toll free: 1-877-4-mic-pre
Vintech Audio
9828 Gallagher Road
Dover, Fl 33527

email: audioguy1961@aol.com

As a courtesy, I would ask that you take a few minutes to post what you find out from Vintech, so that others facing a similar situation can benefit.
Thanks,
-donny

Thank you. I will write to the support and accomplish your goal with the answer.

Vitalie Andries, post: 435017, member: 48831 wrote: Hello everybody. I purchased a vintech audio x73i, and I have a question for experts...
Power supply is for 120v/60Hz; but in our country is 220v... So i need to buy a transformer from 220v to 110v. My question is; if anybody knows that's the power consumption of "vintech power supply"? ... transformer must be 100 watt... 300watt ... 600watt? ...
and by the way "Vintech Power Supply" is a pulse transformer or classic?(Electron).
this is important when choosing a transformer 220v to 110v.

It's a real iron transformer. Vintech may be top notch when it comes to pre-amps, but the designer must have had a bad headache the day he specified a mains transformer with only a single-voltage primary winding.

With only a single X73i in use, you could probably get away with a 200W step-down transformer.

Boswell, post: 435063, member: 29034 wrote: With only a single X73i in use, you could probably get away with a 200W step-down transformer.

Bos...

From what I read, the Vintech Power Supply is normally capable of powering up to 4 of the X73i's - I'm only mentioning this because I am curious as to how the step-down XFO might affect that, if at all; in that if at some point the OP would want to add another few X73's...

Boswell, post: 435063, member: 29034 wrote: It's a real iron transformer. Vintech may be top notch when it comes to pre-amps, but the designer must have had a bad headache the day he specified a mains transformer with only a single-voltage primary winding.

With only a single X73i in use, you could probably get away with a 200W step-down transformer.

thanks for complete information