Does a higher gauge electrical wire impact voltage level?

@carlsbad

Excellent observations.

I would also question the accuracy of the test device. I have one that reads 125 while another reads 118, parallel OR in series.

In the end the voltage supply SHOULD have imperceptible effect on SQ so what is the concern?

@fuzztone 

Indeed, the voltage is not important to most ss amps.  however, the noise and other things that challenge your amp to produce quality sound also are likely increased with poor voltage supply.

many voltage meters can have a zero offset, but if he is using the same meter for all measurements, he observed spread of 13 volts is probably real.

Tube amps can benefit from constant voltage, some more than others.  My power regenerator provides 119.9 volts 24/7/365 so I never have to think about it.

Jerry

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.