100v,115v versus 230v

@ditusa THANK YOU,  surely will do,it has been rather educational for me , esp, how vicious 9 volt battery can be be.

Some of my  japanese friends who they live different part of japan where voltage is 200 volt they say their audio gear it sounds better then 100 volt supplied areas.Known fact all the audio gear has transformers except OTL Amps etc, another person I know who he Returned from USA brought his  120V ARC REF 610 Power amps to UK He is saying that he is getting better results using step up/ down device.

Thank you all participated members & contributors , a part from safety aspects of AC  mains 120 or 230/ 240 volt, only a few audiophiles commented on benefits or advantages of running Audio equipment 230/240 volt. (ditusa  I run my amps on 230Vac.They sound better. (Improved speed and better transient response.)  which I totally agree with him , after peeling the layers decided to install 240 volt AC  mains in my new home rather then converters or step up/down devices thanks to  (JEA48 Jim.) and Ditusa how easy to install 240 volt US homes also plenty info on you tube https://www.youtube.com/watch?v=2h2XsKgkFCo
remaining problem is voltage fluctuation in US Voltage can go up to 124 volt or higher even below 120 volt , similar problem in UK  voltage can go up well above 240 even well below 240v depending on peak time, tv , washing machine etc , etc, I  believe oversize transformers may able to coop with this , but for standard transformers it may be a problem can anyone suggest adding voltage stabilizer resolve this issue.

it has been a great discussion, I  would love to hear from designers manufacturers if there is noticeable difference better performance running 120V Audio equipment on 230 volt naturally requires step up/down as ditusa has mentioned in his post he is running his gear at 230 volt  , I run my amps on 230Vac.They sound better. (Improved speed and better transient response.) ditusa

@ditusa , I thought you were living in USA, voltage sensing or switch mode power supply/analog switching amps just like Nuforce design amps works any voltage worldwide are not my main concern. I'm moving to USA soon ,planning to take all my gear with me do not want sell my we91 amplifier which is 240 volt that's why raise the question , in my humble opinion audio equipment regardless of how hungry or not performs better 240 volt operation.

@ditusa , please do excuse my lack of understanding is rhode island ac mains 230 volt ? because my understanding from your earlier post as if you were running your gear 230 volt and you are preferring it this way, could you educate me how do you do it ? much appreciate your help. moving to Bangor (Maine)

Excellent info ! an american scientist friend also shared this additional explanation to me example of Kettle and hot tubs,,,

110-Volt Hot Tubs

• Pros: Have a 110-volt power outlet? Score! If you’re in the United States and you’ve plugged any type of electrical device into a wall outlet then you have the necessary socket to run a 110-volt hot tub. So, just fill with water, add your hot tub chemicals, and enjoy!

• Cons: What’s 220 divided by 110? No need to bust out that calculator; the answer is ‘2’ and that means it will take twice as long to heat up a 110-volt hot tub as it will to thermalize a 220-volt hot tub. To add further insult to injury, the amount of time your pump runs to circulate the water will also double (compared to a pump in a 220-volt system).

Questions remains, if 220 volt has more guts and torque does High end equipments sounds better at 220/230 volt ?

@GEORGEHIFI7, BRILLIANT ! it seem to me this little device is almost perfect answer.