Here is a link to Amazon uk who sell these speakers.
http://www.amazon.co.uk/exec/obidos/ASIN...-8446690-644706

This product is for 240v

I bought Logitech Z2200 speakers whilst I lived in USA and brought them back to UK and used them through a 110v to 240V transformer and they work fine. However if they are bought in UK they will be already changed to UK voltage.
Cheers
Carol