Power Conditioners

@foster_9  Thanks for the suggestion. I'll save it for future reference. Much appreciated.

Use the cheap ones for cell phone chargers, and the better constructed ones for your audio components. Make sure you run them in for a full day or so with a fan, TV or other appliance, then do several listening tests. The power conditioner may sound good with some components but not others. Verify for yourself. You may very well end up with one brand for the source components and another for the amps or subwoofer. 
If you use a surge suppressor, plug that in closest to the breaker panel, if possible.

I’m surprised in this thread and some others no mention is made of Sola ferroresonant transformers. 

https://solahevidutysales.com/mcr_portable_series_power_conditioner.htm

They’re not sexy looking, they’re heavy, they buzz, they naturally run hot, they’re not cheap and they’re hard to find (mostly because they’re made to order).

In spite of their drawbacks, not many other AC line conditioners do as much with so few components as a Sola.  No semiconductors of any kind.  No sacrificial MOV either, no need.

And yeah, I’ve used a MCR series for years and would not consider anything else.  And yeah, it lives in another room where I can’t hear it buzz.

Anybody tried Furutech GTO-D2 NCF or e-tp609 NCF?

I’m surprised in this thread and some others no mention is made of Sola ferroresonant transformers.

I don't see why- ferroresonant transformers make a fair bit of noise in their output, which should be a sine wave for best results. They are good at line voltage regulation, but otherwise make for a lot more noise on the line than the line would usually otherwise have.