I just got my HE4XX and the soundstage in PC games is very constricted and small. I cannot hear what's happening outside my direct vicinity. Huge night and day difference in soundstage between this and my Ad900x and K702. I dont expect the HE4XX to match the soundstage of those 2 headphones but it is not even %40 as large in terms of soundstage. This goes against the mainstream reviews i read about the HE4xx. Also i cannot hear footsteps as they are too quiet (recessed). Imaging is good though. What could be the problem? Not enough amplification power? I am using on-board audio chip on gaming laptop which drives my AKG k702 loud enough. Or could it be a faulty product?
Just got mine and the thing that amazed me was the sound stage, bought them for gaming purpose. I use a Creative zxr soundcard and they can drive them fine. But might be they sound better with more power but i wouldn't know as i dont have balanced cables for them yet.