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US 2x110 volt 60Hz the same as 220Volt 50Hz

I have four solid state monoblocks in Germany, which I would love to try in my system here in the US. I have a 2x110 volt=220 Volt - 60 Hz line here in the US and would like to know, if I could use my German amps which need 220 Volt but only 50 Hz. So basically it is the same voltage but the Hz, 60 Hz here in the US, versus 50 Hz in Germany.
I talked to the German manufacturer and he told me ,it would be quite expensive to change the power supply, since a lot of labor would be involved. These amps have no switching power supplies.
Anybody here with enough technical knowledge to help me?
Not only do I need to know, if I can run my amps, but what about the sound quality? I know I can run German 220 Volt equipment on this line, I have a power washer from Germany, which has been working fine for years, but there, the sound quality does not matter of course.
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anfield
32 posts
 
Question for albertporter and sndsel - two out-of-phase 120 V lines added together should give 240 V. If their phases are 120 degree apart it doesn't add to 220 V. Am I miss something here, or my high school trigonometry gets too rusty ?
anfield
32 posts
 
Correction to my above post, please replace "out-of-phase" with "in-phase".
albertporter's avatar
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albertporter
4,927 posts
 
Anfield, no your math is not wrong, the confusion comes from two different types of electrical in the USA. Many areas, including my own home are three phase. There is Delta three phase, where two legs are 120 to 138 degrees apart, and two phase, where they are 180 degrees apart.

The two phase is typically 120 volts per leg, making 240 volt, not 220 volt. Delta three phase is 208 volt and if our friend using German amps were to hook up to this configuration, it could actually start a fire.

My intention was to make potential users aware that their electrical should be approved by the manufacturer first and then checked to see if service provided is what is approved for that product.

At my home the three phase Delta is used to more efficiently power my large air conditioner for the long hot Texas summers.

I also use 220 for my power amps, but for that use, the feed is the same as for our clothes dryer. 240 volt which is derived from 120 phase one and 120 phase two with ground.
anfield
32 posts
 
Thanks albertporter, it is all clear now.
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