My Nephew keeps coming to stay (16) and brings his Electric Guitar which I don't mind, but I don't want him using my Amp (which I love more than life itself). I am often away and he is there when I'm not.
Is there any sort device I can buy to lock it? Maybe something that goes in the Line In Socket to prevent him plugging his Fender in.
Locking it in the garage is not a option!