Does a higher gauge electrical wire impact voltage level?

With respect to variations in volts, aren't all the capacitors in a amplifier designed to mitigate variations in power supply. Ie. Because capacitors store up energy waiting for demands to deal with frequency variations?

I guess An improve power supply via lower gauge electrical wire benefits the overall amplifier function in addition to all those capacitors charged up ready to go, although this relationship is unclear.

@carlsbad

poor voltage supply

this has no import w/o a definition. Most all amps handle the given range no problem. The OP didn’t say nothin’ ’bout amps before you did.

There was no measurment protocol mentioned. You are the only one alluding to meters.

BTW I too have a regenerater. Nobody cares.

Carlsbad

With most amps able to handle the given range then why is it necessary to deal with Power supply issues related to smaller and larger gauge electrical wires? 
 

You bought a regenerator so you can have a stable power supply. There appears to be some contradiction herein.

A relative novice chiming in here.

My system is tube amps feeding Klipsch Cornwall 4's. The high efficiency Cornwalls are easily driven by the Primaluna EVO 400's pre and power. Lately, I have been mucking about with vintage Western Electric cloth covered wire with tinned, stranded wires in both 16 gauge and 10 gauge which I have made up into speaker cables. They have supplanted an Audioquest "Castle Rock" bi-wire cable which is articulate but too bright.

Immediately noticeable with the 10 gauge cable is that bass has become deeper and more impactful. However, 10 gauge jumpers to the "High" speaker taps on the Cornwalls presents a high end that is somehow too forced and strident sounding. Therefore I tried using 16 gauge jumpers and found everything pretty well balanced.

My question - is there any potential harm to electronics by mating these two different gauges in one string of speaker cable?
 

With respect to variations in volts, aren’t all the capacitors in a amplifier designed to mitigate variations in power supply. Ie. Because capacitors store up energy waiting for demands to deal with frequency variations?

The caps are supposed to smooth out bumps in the power supply to a point, but...!

Most amplifiers are "unregulated." Meaning long term (several seconds) changes in the AC line will make it to the amplifier voltage rails. So if your DC rails are +- 50V with 120VAC input, they will vary in proportion to input. They could be 45V at 108V for instance (picking values that are 10% for ease of math).

Also, noise can jump across the power supply caps due to the inherent lack of perfection in the caps. Series resistance and inductance can reduce how perfectly they cut noise out.

Line level devices, like your preamp, CD player, DAC, etc. however are almost always fully regulated.  Meaning so long as the incoming VAC stays above a certain point, the voltage rails the circuits depend on stay locked at their designed voltage, often 5, 12 or 15 Volts.  In these cases, even wider incoming VAC variations won't really change what the working voltage the circuits see.