Dedicated line (almost)

@audphile1 - I don’t have the switches on the same circuit as my outlets, but generally speaking, physical and electrical noise seems reduced compared to the old school turn to dim type of switches.

Also just a lot easier to set up correctly for LEDs.

Unfortunately it’s become impossible to fully exclude RFI (radio frequency interference) due to everything from streamers to laptops and home automation, doorbells, etc. from our lives. Best we can do is try to keep the big transmitters like routers, away from analog gear and use shielded power and interconnect cables.

Like I said though, that’s my experience, which may not be the OPs!

Also, the Furman conditioners I use are good down to 3 kHz or so, which is _very_ low compared to EMI/RFI filters. It may be I suffer less due to that filtering. I know for sure it made my system sound better when I lived in apartments close to many others with elevators in the building (but, of course, not on the same circuit! :D)

My past living situation may also influence my choices.  I am 100% into using shielded power cables after my conditioner, to make sure my clean power stays clean, and shielded interconnects.  I don't necessarily recommend you spend a lot of money, just make sure they are shielded.

OP:

Well in that case I think you have your answer.  I'm lucky enough to not have that particular mix.

I also use Furman with LiFT and SMP, so I may have better than average noise rejection.  In my past life as an apartment dweller I always knew when I didn't have a Furman in line.  Good luck!

Erik

OP:

The proof is in the listening.  Do you hear a difference when the lights are out? :D

Erik

Modern dimmers and LED replacement bulbs are much quieter (both electrically and mechanically) than old one’s, especially compared to LED lighting with plug in power adapters.

If you have new LED bulbs with old school, turn to dim controls you probably want to upgrade those dimmers, and I even recommend skipping new LED aware dimmers and going straight to smart switches.

I’ve found that the modern, but dumb dimmers are not only hard to calibrate, but tend to be far too voltage sensitive. After swapping out dimmers in my house a little voltage change from the AC or other appliance would cause the lights to dim or brighten noticeably. Replaced them with smart switches and those problems all went away.

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