I wanna ask if ak100 perfroms well without AMP on my 1964v3. and i want to buy x1 which is a headphone of Philips. I mainly listen pop and rock. I would appreciate it

firstly, I have to say that the sound of er4 is pretty clear and clean, which is the biggest feature of er4, isn't it?  and instruments are performed well on it. but on contrary, the sound of man played by it doesn't catch my ears compared with shure se535. things would be better when er4p...