Dear All,

Sorry if this question is not related to software.

DNG is frequented by many people who manage computer as their bread
winning job. So, I am asking here.

Lately, I have experienced an amplifier input failure that was
supplied audio signals from a laptop powered with an AC mains power
supply. As you know, these AC power supplies are of the switching type
that use an inductance to transform voltage. The problem with these
power supplies is the fact that energising an inductance, also
energises parasitic inductances and capacitances that give rise to
transient interferences that may cause an external circuit to fail.

Has anyone used some sort of filtering circuit to protect their
laptop/s or computer/s?