I have this one, and tbh it's decent, but nothing great (for music at least). It runs hot, like very hot. If you run this guy at line-level (max volume, 2Vrms) alongside an O2 amp driving a Takstar Pro 82 headphone, you can turn the said headphone into a superb gaming headphone. I'm not kidding, it feels like you're using wallhacks or something. The clarity, pinpoint accuracy and imaging is out of this world! But for music, its kinda meh. A Schiit Fulla 2 or Stoner Acoustics UD125 are more enjoyable than this iDEA, imo.