Low incoming voltage

120, is the US standard. 110 is not.  It use to be 110-117.  The older gear yes the newer gear NO. Plane and simple. Brown out is the worst when it comes to overheating, and in general shortening their life.
My older valve, point to point stuff, I bring them up on a variac, for 2-3 days at 40-50VDC, and at again 90 or so.  NEVER over 115 (117). Two three years in mothballs, gotta be careful. Do that with a new piece of equipment. Actually don't do that!!! It would go nuts...

Maintain 120 you'll be fine. 300.00 or so.. will get you what you need.
Surge, filters above 20 khz and 40 khz, multi-copper outlets. It won't let you swap the PC. I added IEC to one of the 4 I use so I could see if it made a difference. It did not.. BUT it did make me feel better.

Maybe you could get a discount for the last few volts they keep, and you don't get.  Seems fair to me. You get what you pay for. YOUR NOT..

Regards

isn’t there a product by ps audio called ac regenerator or power plant that is supposed to fix this?  i am not a power expert - i dunno for sure

https://www.psaudio.com/products/directstream-power-plant-12/#tab-features

That PS Audio is 5,000.00 USD, WOW. Really. I've seen folks buy a PS Audio product and ask, "What PC to use", I don't get it (I think that one was 9000.00) it doesn't come with the best in world? The only one that could possibly work the best, should be included.

300.00 works great for me... I mean really well..

Regards

Yeah, Some "Sticky Icky" will help... LOL
Get the stuff with Purple and Red in it .Yummy ...The stuff that tastes like hash in the back of your throat .... Oh YEAH !!