Depends on what we're counting as electronics. I have a console that's 47 years old, but I don't use it regularly. It functions and it gets used every now and then, but not routinely. If we're talking routinely, then I've got a set of speakers hooked up that I've had since a 1998 Gateway I got for Christmas, so 22 years
. I keep them because they're just better than anything else I've ever used, and they have amazing sound and a subwoofer that gives you some nice power behind your audio (Boston Acoustics BA635's if you're interested).