[jisongkun]

I waited about two month but i received a big disappointment.
my source is iPad classic + SR71A and apogee duet 2.
 
voice sounds very high (grating) and the bass is almost too much to hear other frequency.. to be honest, i feel like its worse than my UE TF10. no need to compare to my other big headphones.
 
i guess the only thing I'm happy with is that JH did a great job on the artwork that i chose. 
 
hopefully after a month of listening, it will sound better.
 

 
 

 

[Staal]

I found my JH16's to sound great right away.
 
Regarding the bass, I don't see how that surprises you. I mean, they're often described as very bassy and thats the reason there's both the JH13 and the JH16 at somewhat the same price tag.
 
Not sure about the voices sounding "high" though. 

 

[jisongkun]

sorry for my bad english. by sounding high i meant the voice is not smooth or exquisite enough i guess? 

 

[Staal]

The JH16 can be somewhat bright and harsh, however, I've never found it bothering nor fatiguing to be honest. 
 
I do remember some people in the JH16 appreciation thread talking about sibilance and such. Maybe you have the same issue?