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Step down transformer (220V to 100/110V) or buy 220V version of Shindo preamp

I really need to buy a Shindo preamp. a) Should I go for a original 220V Shindo preamp (harder to obtain, no local Shindo dealer here) or  b) get a 110/100V version from USA/Japan and use a step-down transformer c) Or get the Shindo dealer to alter the 110V to 220V.

questions:
1) At this level, is there sound degradation if I use a step down transformer?
2) The Shindo dealer will change the 110V to 220V but it will be done by a US tech not Shindo, I wonder if it will lead to some loss. Since soldering and change of resistor will happen. If that's the case I might just buy the 110V version from him.

Any thoughts on using step down transformer in general, does it lead to sound degradation?
essrand
erik_squires
15,912 posts
 
If you want a transformer that has 120VAC at the inputs, then you want a step-up transformer. :)

If you want a transformer that has 220VAC at the inputs and provides 120VAC to the pre, you want a step-down.


Best,

E
erik_squires
15,912 posts
 
About sound, if you use a fully balanced transformer, you may actually improve the overall sound quality.

Best,

E
skoczylas's avatar
skoczylas
240 posts
 
I live outside the USA and have used two step ups for ten years with three amps and a dac without a problem. They are heavy and take up the space of a shoebox if that’s an issue for you. They can also produce a slight hum (not via the speakers but from the unit itself). Overall I’m very happy and can find no issues with using them. 
gdnrbob
4,419 posts
 
I am confused.
Do you need 220 or 110?
Though I haven't done it, I think stepping down from 220 to 110 would be fine. 
B
glennewdick's avatar
glennewdick
1,533 posts
 
I ran a Japan voltage (100v) Luxman amp with a step down and it worked great. Just get a quality on with double the power rating your amp is rated at. That’s the power usually on the back of the amp as you want the usage power rate not the out put power. My class A 50wpc Luxman was happy on a 1500w step down and ran silent and cool. 
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