Stepdown for AVR

Audiolab 7000A Integrated Amplifier
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ShaQ.Blogs

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I am considering to buy an AVR from amazon. problem is it is rated at 110V/60Hz, while here in India we have 230V/50Hz. Hence I require the stepdown. My technical knowledge in this area of transformers is very limited.

Do stepdown convertors have any problems? While i know a voltage conversion is possible, I am not sure of the frequency. Do we have convertors which convert both?

I found that using a voltage converted but the mismatch in frequency will generate more heat which is not good for the AVR. Not sure if this is true. Does anyone know of any such issues?
 
U need to get "Isolation Type" Step-DOwn Transformers. U will get it at SP Road, Maxine Company. Since u r going to use it to power up yr AVR u need to get 1KVA Isolation type. Isolation types r d best ...
 
Thanks for the reply.
Buying from amazon, and using a stedown works out cheaper. Hence am tempted to do it.

But, I have been highly recommended from a very reliable source to avoid this route. I am trying to understand reasons why this is not advised. This puts me in a fix as receiver prices are through the roof.
 
Last edited:
Suggestions for using The isolation transformer sounds good.
But otherwise, it dosent sound too encouraging. :( Also when I consider i wont get warranty then I start to wonder if it is worth importing.
 
@ ShaQ.Blogs

I think you will have to see how much you save if you import and if that amt is good enough to take chance on the warranty !! and when you calculate the cost you should keep in mind the isolated step down will cost you approx 6K.

Also, some of the AVRs even available in gray in Mumbai at very attractive prices and the good thing is you can test the AVR before you take delivery of same and for these you dont need a step down. So if the price diff bet the Gray market and US price + cost of Step down is not much then it may make sense to buy in gray here

Regards,
Naren
 
ShaQ.Blogs said:
I am considering to buy an AVR from amazon. problem is it is rated at 110V/60Hz, while here in India we have 230V/50Hz. Hence I require the stepdown. My technical knowledge in this area of transformers is very limited.

Do stepdown convertors have any problems? While i know a voltage conversion is possible, I am not sure of the frequency. Do we have convertors which convert both?

I found that using a voltage converted but the mismatch in frequency will generate more heat which is not good for the AVR. Not sure if this is true. Does anyone know of any such issues?
Click to expand...

Buying step down is not at all an Isuse. I purchased step down transformer 4 years above. Still my AMP and my step down transformer works perfectly.

Just buy step down transformer matching the input watts of your AMP. Generally it will be 1 KW.
 
What kind did you buy? There's a whole lotta debate going on about Isolation type v/s Automatic type.

And on Wattage as well, people suggest if your AVR drives 500W try and get a Transformer of 1000W or more.

Is this true?
 
snorkel4u said:
What kind did you buy? There's a whole lotta debate going on about Isolation type v/s Automatic type.

And on Wattage as well, people suggest if your AVR drives 500W try and get a Transformer of 1000W or more.

Is this true?
Click to expand...
No. yet to buy. This is my research before i put my money down :)

Am not too sure about this, i dont know much about transformers. I was advised if I go this route (was advised to avoid this route in the first place), then pick one which is rated at least 25% more then that of the internal transformer. But, if you have a better choice pick that over this.
Here are some of the issues involved. Another voltage drop, core losses, more heat at the AVR, hum, and different frequency.

So I choose to ditch this idea, some of you might go ahead. But here is info to be aware of....In case it helps.
 
There are no issues at all except the warranty. Thousands of people bring US appliances at less than half the price from USA and use them in India using suitable step-down transformers. I personally use a Sony HTIB and Yamaha RX-V667 receiver using step down transformers that I purchased locally. And I do not even use the isolation type. However I use a 120V surge protector just a measure for precaution.
 
Ok. here we go..
I had written to denon customer service a while back (pls dont write to them for every small question, research first. They wont support us in future if we flood them with questions in the amateur league).


I am exploring the option of buying a denon receiver from the US & import it to a different country. We have a different power supply standard as compared to the US. Hence I require to use a stepdown convertor. The convertor needs to convert, 220V - 50Hz to 110V - 60Hz.

Hence my question is,
1. If I use a stepdown convertor to convert the voltage from 220V to 110V, would the 50Hz frequency cause any problems which are different from 60Hz.

I intend to use the following front speakers with the Receiver.
PSB Speakers
It is recommended to use a 4? capable amplifier.

Note: I haven't decided on which particular model to purchase yet.
Click to expand...

Denon's Reply:
We cannot support the use of a step down transformer. The frequency difference should not cause damage to the unit however we can make no promises when converting it for a power source it is not designed for. This unit may be able to drive a 4 ohm speaker however it is only rated for 6-16 ohms, therefore I cannot recommend using speakers that are lower than 6 ohms.
Click to expand...
 
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