What's this stuff on the back of a PS Audio Outlet


Anybody know what the function of these do-dads could be? I swapped outlets in a PS Ultimate Outlet 20amp HO unit and was surprised by this stuff.

http://cgim.audiogon.com/i/vs/i/f/1064163571.jpg

Thanks
Marty
marty9876

Showing 1 response by herman

The blue things look like MOV's (Metal Oxide Varistors) They provide overvoltage protection. The black square thing looks like a capacitor, probably for noise reduction.