i read somewhere such transformer doesn't provide constant and steady electricity for a long duration.
I do own a 800W transformer which I use for my marble flooring polisher which I bought from US.
Now I don't polish my marble flooring anymore --- too tiring and also I have learnt to live with slight stains on marble flooring.
if anyone want such a transformer, I can sell it to you.
True, best to get locally or wait for Hwee Seng warehouse sale. (Onkyo distro)
AMP draw lots of power if the power isn't stable or reliable, it will
causes many problem or even failure like random shutdown/switch off.
US is cheap, voltage, warranty and inconsistent performance due to
use of step down wattage so not worth to get.