Clean AC power

Get a good dedicated lines.
Do not plug amp into filter box etc.
Go directly into the dedicated line outlet

Life-saving tip: If you see someone get hit by lightning or is otherwise electrocuted the lethality is due to the heart going into ventricular fibrillation. Therefore, you should check for a pulse and if absent, do a precordial thump, which is a fairly hard and sharp blow to the sternum. Do it once and check for a pulse and if there’s no pulse, do it again and check for a pulse. If there is still no pulse, start chess compressions and get help. If you are uncomfortable with a precordial thump, go directly to chest compressions after checking for a pulse.

I had an old power wedge & decided to try a conditioner to see if there was improvement.
I got an iFi power station with the two additional I purifiers.

It made a significant improvement in soundstage imaging, blackness & clarity. More improvement than I had expected.

I have reference level cables & I think that helped to realize the improvement.

Really glad I tried it cause the improvement it made in listening to just my MD102 tuner alone was worth it…

I have found tremendous benefit from cleaning the exterior and interior power.
I ran 3 dedicated lines.  I found putting my mono amplifiers on one line, my digital on another and analog on the third.  I have a Denali on the analog and PS 10 Powerplant on the digital.  I have found changing the settings on the PS 10 to have a lot of influence on the sound.
I have removed all SMPS power bricks from the above lines and run them on a house line.  I found  the SMPS injected significant noise and caused ugly distortion.
I have an Akiko Corelli on the Denali, it dropped the noise level.
I have LPS's for as much gear as I can.

I highly recommend PS Audio Powerplants. With their direct puchase plan you can return it in a month for a full refund. Trying them out in your system is the only way you'll hear the difference.