On Saturday, 8 December 2018 03:57:57 UTC, wrote:

"how would a couple of volts mains drop have an effect on pacemakers? "

It won't. It also should not affect any audio or other equipment that is designed right. The only POSSIBLE problem might be turntable hum but even then...

All domestic mains current loads are balanced, ie live & neutral carry the same & opposite current, resulting in nearly zero magnetic field. Pacemakers, like any life-critical medical equipment, are designed & tested to meet harsh real-world conditions & keep going.


NT