Gbart, You are absolutley right
They are built to tolerate 110 to 130 volts
However that is not the range they sound best in! For sure the best sound comes from most gear in the 115 - 118 range
Mainly this is due to circuits sound more hyped up or "Grainy" with higher voltage mostly from amps bias being thrown off, gotta remember this gear is built and tested on a bench running a variac of sorts feeding them dead on dialed in voltage for testing. I have heard regenerators and even cheaper monster power centers (yeah the ones with the cheesy red digital readout) sound pretty good when knocking that voltage down.. The higher the voltage the less beef you get it seems, thinned out, less amperage, bass is not as strong, and most people complain their gear sounds bright but its simply the wall outlet is really high!
Trust me I had one time solid state amps that had manual adjustable bias banks on the transistors.. I was running about 126 volts from the wall Brought the bias MA into range to counteract it and bam they went from ragged, tipped up mid fi sound to nearly the best smoothest balanced gear I had experienced! Now of course this was not a solution, because as you say you would go crazy daily going inside with mini screwdrivers adjusting the gear each time to get optimum bias etc due to your varying voltage from the house.. This is why killing the issue off at the front right from the outlet and leaving the gear at the factory set adjustment would be best. Anyway I have made a decision and purchase..
Balanced / isolation transformer It will have about a 5% loss bringing my wild voltage down to about 122, and in theory in turn give me 61 volts per phase on the output plenty low enough now being split into a balanced load for any gear to run much more optimally for the most part. Nothing fancy, nothing current limiting or adjustable just one continous clean output more or less regardless what the wall is doing, each leg will not vary much more than between 58 to 64 volts lets say which is not gonna be any kinda real shocker vs. how much difference there seems to be when running straight AC at 115 vs. nearly 130! Big difference in audio and video in my opinion.
By the way hi grade test equipment for accuracy and hospital gear and instruments are of course very sensitive much like your audio gear and for best consistent performance trust me they DON'T trust the Power company to get them 110 to 115 volts all day! They take many steps and pieces of power gear to make sure this is done internally.
Thanks for the suggestions.
Trust me I had one time solid state amps that had manual adjustable bias banks on the transistors.. I was running about 126 volts from the wall Brought the bias MA into range to counteract it and bam they went from ragged, tipped up mid fi sound to nearly the best smoothest balanced gear I had experienced! Now of course this was not a solution, because as you say you would go crazy daily going inside with mini screwdrivers adjusting the gear each time to get optimum bias etc due to your varying voltage from the house.. This is why killing the issue off at the front right from the outlet and leaving the gear at the factory set adjustment would be best. Anyway I have made a decision and purchase..
Balanced / isolation transformer It will have about a 5% loss bringing my wild voltage down to about 122, and in theory in turn give me 61 volts per phase on the output plenty low enough now being split into a balanced load for any gear to run much more optimally for the most part. Nothing fancy, nothing current limiting or adjustable just one continous clean output more or less regardless what the wall is doing, each leg will not vary much more than between 58 to 64 volts lets say which is not gonna be any kinda real shocker vs. how much difference there seems to be when running straight AC at 115 vs. nearly 130! Big difference in audio and video in my opinion.
By the way hi grade test equipment for accuracy and hospital gear and instruments are of course very sensitive much like your audio gear and for best consistent performance trust me they DON'T trust the Power company to get them 110 to 115 volts all day! They take many steps and pieces of power gear to make sure this is done internally.
Thanks for the suggestions.