Most use linear regulators but in the next two years that might be changing due to additional EU import restrictions. The EU will be requiring 'zero phase angle' power supplies in all electronics imported to the EU. Switching power supplies are the only thing that can do that. My guess is that temporarily, at least, it will mean a degradation in sound.
Obviously the restriction is political- untilities have been dealing with power factor/phase angle issues for 80 years and now all of a sudden this is an issue?? Politics.
Obviously the restriction is political- untilities have been dealing with power factor/phase angle issues for 80 years and now all of a sudden this is an issue?? Politics.