my speakers pop on one of my basement workstations everytime the kitchen fridge compressor turns on, though they are on different physical circuits. there's not enough commutated duty in whatever bridge was used in the line-tap xfmr converting from the 3-phase outside, to the 30-40 or so separate 120v circuits inside, to smooth out the bumps. maybe 40 years ago it was enough.

my head-unit supply for my lab uses much better-quality caps & coils, though I probably could've just bent up a couple off-the-shelf surge protectors