What about noise from transformers at the pole? I would imagine that a UPS would calm that noise down, perhaps replace it with its own, and then the filtering of decent power supply in the sources.
UPS vs LPS
Will a "standby" UPS with AVR (auto. voltage regulator) and EMI/RFI line filtering serves similar purposes to an audio system as the LPS (linear power supply). What are the pros and cons using UPS vs LPS? One of the particular reasons I prefer UPS is to prevent the sudden interruption of power due to frequent storm we have in Florida to possibly damage the system while playing. Could you recommend affordable UPS that you had experience with? Thank you.