in fact, the most player has no hiss, even the cell phone player has no hiss. Why? for it has weak out put power and muddy sound. you can't distinguish the hiss.
Studio has several times stronger out put power than normal players. so, the hiss level is also enlarge several times.
The so called hiss is not that horrible as most people thinking. normally, it will not be audioable when the music are playing.
Some times the hiss comes with the music files, please check the files.
It is a compromised that the most "fresh" sound quality with the very very slight hiss. for you all agree that Hisound DAP has very "sweet" and juicy sound quality. It presents you every thing of the music, of course , some times the possible hiss at the same time.
and as LEE has pointed out, the rest hifi grade players are all have hiss, SONY's 1060 has much bigger hiss level. So, no hiss don't means it is a good player.
in fact ,most audio devices have hiss it just the matter of the hiss level
We think the hiss of STUDIO 3rd ANV is good controlled, and can't be heard when the music playing.. and it can't be heard at day time with TF 10 ,Or SE 350.