My friend has bought tzars 90 on recommendation from this thread and he has played them un amped thus far. He complains that the background sounds unclear and it isn't balanced. He used to own the shure se425 and he claims that it was significantly better than the tzars 90 and he wants to achieve something of similar performance or greater. His music player is cowon z2. He was about to throw away the Tzar 90s but I advised him to instead wait for the response of the head fi community to see what is the recommended course of action.
Can someone explain whether the tzar 90s are worth it for my friend or if he needs to amp it to do it any justice? If so, how can he amp the tzar 90s with a cowon z2 DAP.
Do you or your friend have a amp to try them on? I would recommend trying them on a desktop rig (an O2 should suffice), or even a FiiO portable amp should be enough to see if the amp can open the sound up some. I haven't heard the Tzars, but if I were to guess the would sound better than the SE425. Try an amp with them.