Have you noticed that over time your system gets to sounding a little off, maybe a bit slow, lacking sparkle and verve?
Here's an easy fix that I use every couple of months.
Unplug everything from both ends by removing the power cord from every piece of kit in the system, then plug it all back together.
Not so much. What you're doing is "cleaning" the naturally occurring oxidation from your AC power connections. The worst offenders are copper/brass and unplated AC connectors, in particular the wall receptacles. These tend to "barnacle" over time, meaning microscopic protrusions erupt from the surface and hinder conductivity.
A simple exercise over the weekend that will breathe new life into your music.
Give it a try.