thanks all for responding. i just got upset because i talked to a luxman dealer and he told me i made a big mistake buying it like this with a transformer. so far i have been really happy with the amp. didn't detect any weird noise but it is always hard to know without comparing. the dealer told me that if i want to modify it to US standard it will cost a huge amount...honestly i may have to move in Europe so i would have to mod it again. if the is a better transformer i can maybe consider it. this one is the one they sell at Audiocube.
