I would like to ad something I experienced that might be relevant. I have a 35 years old trac house that is fairly nice build , but I did find exceptions. Decent Supply panel and appropriate gauge copper wire and decent grounding including multiple earth ground rods. However the inside was finished with subpar duplex outlets. I replaced my outlets and added Hubbell medical grade for my stereo and 3 TV’s. Over time I had a GFI circuit in my wet bar that had my lights dimming when I ran a high current hot water heater. I checked the panel and all was good. One day I was working on my pool and at the time had an older single speed pump motor. I heard the motor going on/ off , on/off in short spurts. I went over to the panel and could hear very slight intermittent arching. Long story short , I had tired breakers that would trip easy or not hold full load. The 40 amp breaker for the pool had pitting on the bus bar. I moved that breaker location and installed new breakers on most of the circuits and ensured everything was tightened down. My service panel is on the west side of the house and cooks in the hot summer sun. Two years ago , when I had solar installed , I requested to have a new service panel installed. My point is the average person does not think of this as a wear item and never inspects. My senior neighbors had their panel let go one day with a violent event and we’re fortunate to not have a house fire. It’s my understanding that this is greatly complicated with aluminum wiring. Also over the years I have encountered low voltage issues that have damaged the controller in my air conditioning. Most of you are above my pay grade , but some just don’t know Cheers , Mike B.
Don't try to fix these electrical prolbems with a conditioner!
Over the years of hanging out here I’ve seen a lot of audiophiles with significant electrical problems try to fix them with a power conditioner. Lordy. Look I’m a big fan of power conditioners and as you all know recommend Furman often... but they can’t fix what they can’t fix, and may mask serious problems.
Ignoring an electrical problem in your home is to ignore a property and life safety issue.
Lights flickering? Feel a tingle when you touch your equipment (or washer or range)?
We are used to seeing famous authors recommend weird/bespoke AC panel solutions, or isolated circuits, which of course are not free. My two recommendations here will set you back $20 or less.
A tool every audiophile, no, every homeowner should have is an AC outlet tester. You can get them at any hardware store but I like the cheap-o Kawaits style from Amazon because they include AC voltage AND, critically, Neutral to Earth voltages. All you have to do is plug it in and watch the AC. Is your AC stable while playing music? Does the N-E ever rise above 2 Volts? Do the red lights on the top light up as they should? Then you are good. (PS, a nice voltage meter is better and more reliable, but this is an excellent and safe alternative for those who don’t have a soldering gun in their desk at all times. ) . Don’t stop at your audio rack, check your other outlets too, especially if you’ve moved into an old home.
The other recommendation is to at least inspect your outlet. If it’s just old anyway replace it with an outlet that is rated for commercial AND residential. About $5-$7. Make sure your outlets are using screw down terminals and not back-stabbed (i.e. push in) terminals. I wrote more about this here. Again, I know there are many here who are going to recommend bespoke extremely expensive jewel like outlets. My feelings about all that are in the blog. My point in this post is to suggest super cheap tests and improvements any audiophile can afford.
Be safe. If you see signs of electrical problems don’t patch over them with a conditioner.