Originally Posted by Xstream
I'd go for a proper dap/dac first. I'm not familiar with the Blackberry, but it probably will be the biggest reason for poor sound.
So try the Nano, see how that sounds. Then decide you need an amp or a different cable.
Also take note that the SE535 is very prone to sharpness / hissing highs.
Not sure what material the cable is made from. Is it silver?
If it's already copper i'm not convinced that would be a solution.
In the end it might also be just the wrong headphone for you, like it was for me.
are you talking about the stock cable if no, no i dont believe it is silver i dont know any iem's that come with silver cables unless your talking about 1k+ uiems. its possible a high quality copper cable could tame down the mids and highs while adding some other benifits.
the blackberry is a very poor choice, in fact IMO all phones are poor choices with the exception of the note 3 possibly, as phones are meant to be phones and not DAPS. so they lack the dac and amp section you might find on a moderately price DAP like say the x3,dx50,ect
i wouldnt say the se535 are prone to hissing, but it really comes down to the source components you are using with them, they are very sensitive IEM'S so they are going to pick up easier on say floor noises of amps that otherwise wouldnt be heard by other iem's.