Hi Guys. I recently brought a Audio Technical Headphones ESW9 i looking to buy a portable AMP Current in my list is Fiio E6 Digizoid Zo2 And Ibasso D-Zero which one will be better? I don't wish to upgrade the brass not brass head is because the ESW9 sound is very clear and very sweet with female Vocal and Sound Stage and music instrument at top level i just needs some upgrade to made the sound from clear to clearer from sweet to sweeter Thank 
Edited by jrwong28 - 1/5/13 at 11:12pm
Edited by jrwong28 - 1/5/13 at 11:12pm















