Electrical Advice Please Are all US-UK plug adaptors suitable?

Belenus

What exactly have you connected to the 120v speakers?

Perhaps I am misunderstanding your posts and your pictures but it looks to me as if you have connected a switching adaptor designed for 100 to 250 volts, so suitable for UK power supplies, that outputs only 12 volts so won't operate the speakers but is unlikely to damage them if they are expecting 120 volts.

RealGem

Belenus said:

What exactly have you connected to the 120v speakers?

Perhaps I am misunderstanding your posts and your pictures but it looks to me as if you have connected a switching adaptor designed for 100 to 250 volts, so suitable for UK power supplies, that outputs only 12 volts so won't operate the speakers but is unlikely to damage them if they are expecting 120 volts.

I only used the adapter on the speakers, not the plug for the 9V device. So, as two others here told me, I zapped it with 240V. 

getmore4less

We're these speakers from a UK supplier?

Got a link? 

a

RealGem said:

People only get upset
when their expectations are not met.

We get upset when people ask for help, but expect their reply to give the full facts and not skimp on the details or confuse us, so as not to get you upset

Think this is your setup

If you have plugged 120v speakers into 240v, then you have blown the speakers.That black power supply plug is  sort of ok, but is rated at a maximum of 500ms, which matches the maximum voltage and current of the white unit. Ideally the black supply should be rated at a higher current than the unit.

personally have no idea why you would buy this when there are so many sounds like this on youtube for free.  They can even be downloaded from youtube (if copyright allows personal use), and be played on a mobile, or cheap usb battery operated amp, or tablet, or computer, car radio etc

getmore4less

here is how the speakers come apart.
https://www.youtube.com/watch?v=3X1xlzrhMR8

can't see from the video if there are any fuse/cutout on the transformer or circuit board.
if the board had over voltage protection they might work when plugged into 120v  again but if you don't have a supply not that useful

Plenty of cheap speakers that work on UK,

depending what you want the speakers for there may be better options than old multimedia pc speakers set.

 

lammy82

Q: "So why did you connect a 120V device via a simple adaptor plug to a 240V supply, if you knew that they operated on 120V?"

A: Because the adapter said: "120V - 240V"
As I said before; I thought that meant it included all devices from 120V - 240V could be connected to it.

The adapter doesn't say that, though. Not according to your photos, anyway. It just says "250V". It doesn't transform anything, it inputs anything up to that voltage and outputs the same.

"120V - 240V" is what it says on the transformer (the "plug"), which you are using on the sleep noise machine. It inputs 120V-240V and outputs 12V.

So there is no reason to think that you could connect the speakers through the adapter, unless you didn't know that the UK power supply is 240V not 120V.

The thing is, although it's likely you have fried the speakers, you don't know for sure because you've not got a 120V power source to actually test them with.