Hellow, fellow static electricity generators. 
Yeah, I might be wrong but I believe computers and other components are able to survive a lot of things. But amps… will amplify, therefore multiply the possible electric problems in your house, or the static electricity if you ever “give a static shock” to the RCA inputs of your amp and grill it like I did. Or in your case, break your headphones.
Instead of giving thousands of dollars to an electrician you don’t even trust in a place where electricity isn’t even taken seriously (oof), maybe… get a linear power supply. 