I don't really understand what you did here. Digital audio players and other portable electronic devices would often (generally?) come with universal (100-250V) transformers as far as I know so all you might need is a US/Irish plug adaptor or to snip the US plug off an wire on an Irish one. Not sure about other devices. Did you actually buy something and try to use it without success? If so please post specific details of what make and model of device, what transformer/power supply it came with, what you plugged in etc. etc.Bertson,
I have the same scenario but I was the one that bought it in the States as I needed to justify more gadgets such as extra ipod and sat nav at the time, I used a normal adapter (220 to 120) and now it won't work, I wonder if I have did any major damage if anyone reading this can tell me that would be great.