Hi Alvaro
I have a surge protecter extension lead socket with inputs for 5 plugs, this covers all my gear which I might use, I am more concerned about third party wired sockets then my equipment. I like to know that my gear is as safe as it can be. Having said that, I have noticed that over the years if you have no stage to perform on, how close people come to my keyboard whilst I am playing it, in fact I can recall two instances where they knocked my keyboard, not hard but I had to realign it on the keyboard stand. Thats more of a problem then a power surge.
Steve