gustard h20 buzz noise

[djyang0530]

i got h20 today and from the power part (not with the headphone) i hear a noise like buzzzzzz about 30db is this
normal?

 

[Alcophone]

Is it set to the right voltage...?

 

[djyang0530]

Is it set to the right voltage...?

i live in us so i use 110v and it shows 110v

 

[djyang0530]

Is it set to the right voltage...?

 

[Alcophone]

Hm, okay. Can't say I've ever heard mine buzz. Does it sound anything like this? Is the audio okay?