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Old 30th November 2014, 05:24 PM   #1
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Default Subwoofer power supply

I need to know something, I have a Subwoofer, that is the UK rated 230v 50hz. Howevcer, someone wants to buy it from me that lives in the US, so, 110v - 120v 60hz. What type of transformer would I need? What is the difference between our Brown (live) - (Neutral) Blue, to the US? I presume the person in the UScan buy a step up transformer that can power it all ok?
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Old 30th November 2014, 05:29 PM   #2
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White is neutral, black is live in the US. Usually.
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Old 30th November 2014, 08:45 PM   #3
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I see, but, if say, the person in the US buys a step up transformer, which is 220v - 230v AC 50HZ and it is rated at 450w power consumption (if it states 400w on the back plate for the power consumption) or maybe go higher to a 600w step up transformer, that will be ok? It wont like, makes components go bad after a certain time period?
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Old 30th November 2014, 08:49 PM   #4
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I ask that as in UK there are some cheap n cheerful step up transformers for literally like 5 odd. I need one that, has the US 2 pin on the transformer, thus AC 110v - 120v 60HZ, then in theory, he will plug that in a outlet in his home, with the 3 pin UK socket on the other side, then a simple job of just plugging it in... I do not think we can get a US standard step up transformer over here in UK :/
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Old 1st December 2014, 07:41 AM   #5
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Does anyone know?

I do not want try slowly fry goods over time using one, even if that is possible with it being the correct AC voltage and HZ range...
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Old 1st December 2014, 08:44 AM   #6
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Just, I can not find the right type of step up transformer here in UK.

I need a US, 2 pin, that plugs in to a US socket, obviously with the 2 pin US on it, then the 3 pin UK socket, that whatever appliance is plugged in to that, will run it, no problems, which, the transformer will be 110 -120v US 60hz (that plugs into a US power outlet, with the 3 pin on the reverse that puts out the UK 230v 50HZ, can these be bought in England? OR, would I have to order one in from the US?
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Old 1st December 2014, 09:03 AM   #7
Did it Himself
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They aren't really sold over here as nobody has USA mains sockets to plug them into. It would be better for your buyer to get one, as you would probably end up importing one only to have to export it again - lots of extra postage as a 400VA one will be quite bulky and heavy. It's likely to be a box with flying leads rather than something that hangs off a socket.
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Old 1st December 2014, 09:27 AM   #8
AndrewT is offline AndrewT  Scotland
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have you looked inside to see what you are selling?

The mains transformer may already be a dual voltage type that will work on 110/120Vac and on 220/240Vac.

You won't need to buy a step up transformer if that dual voltage is built in.
regards Andrew T.
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Old 1st December 2014, 10:49 AM   #9
JMFahey is offline JMFahey  Argentina
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Just, I can not find the right type of step up transformer here in UK.
You won't.
Of course they can be made , no big deal, but the total UK market might be a couple units a year .

2) And forget those $5 chinese "traveller adapter" ones, they are usually around 50VA, no matter what's printed on them, and made out of such poor quality iron that they overheat and burn on themselves, without a load .

You will need a proper UK made one, 600VA rated or better, and you will have to mount it in a metallic cabinet with proper female UK type sockets (whatever your Subwoofer is using now) on the 220/240V side and a properly grounded male USA type on a cable to match his wall outlet.
And it won't cost $5 either .

And even so, there's a great chance of it being stopped at Customs, for lack of proper Electrical Safety certification.

3) what subwoofer is it?
As Andrew T says, it might be dual primary

Or let customer locally get a step up transformer .

4) just curious, how much does that SW weigh?
How much will the Freight cost be?
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Old 2nd December 2014, 12:49 AM   #10
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Thanks for the help people appreciated!

It's to power a REL R528SE Subwoofer rated at 550w power consumption. The other person is treating as they "possibly think" over time, even using the right type of transformer, that it "may" slowly burn the circuits out etc etc but I have stated that, if they do buy one from within the US, then it will work perfectly fine!

And, it doesn't do dual voltages, but for a rather high fee of 330 I could have the whole back plate removed (that I would keep) and to have the US one put in, instead, again, that is a high! fee, I am sure of they bought a step up transformer in the US it would only be around 150 odd.
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