Using amps with transformers

[americanflier]

Greetings
Having just emigrated to the USA, everything I own is 220V driven. What size transformer should I purchase to play my Yamaha RX A830 for long high volume periods without risking a fire or an overheat? I use a pair of Klipsch RF62II speakers with a sub woofer. Any help would be appreciated. Thank you.

 

[mtrycrafts]

Welcome to AH.

Are you sure that component is a single voltage component?

 

[PENG]

Greetings
Having just emigrated to the USA, everything I own is 220V driven. What size transformer should I purchase to play my Yamaha RX A830 for long high volume periods without risking a fire or an overheat? I use a pair of Klipsch RF62II speakers with a sub woofer. Any help would be appreciated. Thank you.

I don't think it is worth doing it because a) a good one is not cheap, b) it will be noisy. it is better to sell it (but I guess it's too late), and buy one locally.

 

[TLS Guy]

Peng has given you good advice.

The power draw spec. of that unit is not in the spec sheet of that unit.

Generally your idea is a bad plan, and I agree not worth the investment.

Also you did not state the country this is designed for. Since it is 220 volt, I suspect it may be from Asia. Some Asian countries are two phase 220 and not single phase like Europe.

The next issue that the FM Eq constant varies from country to country.

I strongly support the idea of buying a new unit, given the cost of a decent safe reliable unit to power it from 220 volts.

 

[Andrein]

I spent about 1000usd on ac to dc and dc to ac converters to get 120v/60hz from 220v/50hz. This was to power amp I bought by mistake in US. These converters especially dc to ac one were so noisy i iould hear them from another room listening to music at -15db. Ended up with selling both converters and the amp and buying amp with proper voltage support.

 

[M Code]

The RX-A830 draws 270W @220V according to Yamaha..
U can buy a step-up transformer 120V>220V high wattage, but a good, quiet one is expensive. Also note that the Euro AM & FM tuner channel spacings are different from the USA. Note that for some Yamaha receivers the tuner channel spacing can be set through the OSD, but don't know about this capability for the RX-A830.

Just my $0.02...

 

[americanflier]

Guys
Thanks so much for the informative posts. Would the Klipsch RF62II speakers work with an American amp?

 

[TLS Guy]

Guys
Thanks so much for the informative posts. Would the Klipsch RF62II speakers work with an American amp?

Yes, as there is no powering except by the amp. The only speakers that would no work would be active and powered ones, and that includes powered subs.

I see you have a sub, so that will not work. I would get rid of everything you own that is 220 volts

 

[lsiberian]

Peng has given you good advice.

The power draw spec. of that unit is not in the spec sheet of that unit.

Generally your idea is a bad plan, and I agree not worth the investment.

Also you did not state the country this is designed for. Since it is 220 volt, I suspect it may be from Asia. Some Asian countries are two phase 220 and not single phase like Europe.

The next issue that the FM Eq constant varies from country to country.

I strongly support the idea of buying a new unit, given the cost of a decent safe reliable unit to power it from 220 volts.

Any chance a 220 volt outlet would work?

 

[PENG]

Any chance a 220 volt outlet would work?

In Canada it is 240 V 60 Hz, I am quite sure it is the same in the US. If the device is designed for 220 V 50 Hz it is not far off practically speaking but not a good idea if you want to be on the safe side and to comply with applicable codes and standards. Going from 230 V 50 Hz or 240 V 50 Hz would be on the safe side but performance would drop a little because of the higher frequency here, and again, compliance to ULc or cUL etc. would be an issue.

 

[mtrycrafts]

In Canada it is 240 V 60 Hz, I am quite sure it is the same in the US. ...

Especially since we have power grids tied in both directions, US and Canada

 

[TLS Guy]

In the US the nominal voltage is 120 volts single phase, and 240 volts two phase. So every home receives 240 volts and a neutral. It is 60 Hz. This applies to the US and Canada.

Other parts of the world have 220 to 240 volts single and dual phase 50 or 60 Hz. Europe is 230 volts nominal single phase 50 Hz.

In Asia especially, there are both 220 single and dual phase systems in use which is a problem.

So if he had a 240 volt dual phase outlet installed then I think the voltage would be too high. Also if he came from a single phase region there could easily be a big problem if his unit was designed for 220 volts single phase.

So the advice stands to replace his 220 volt gear.