I am on the quest to achieve the flattest frequency response I can in a portable setup. I have a Clip+ (Rockboxed) which has a ruler flat response. Soon I am acquiring the Fischer 003 (reference cans). I currently have the PA2V2 made by Gary Ali.
Don't get me wrong; the PA2V2 is an excellent amp. But I am wondering how flat the response really is. If it's flat then I will keep it (I have no idea of telling how it's flat. My own ears aren't accurate enough - yet).
So what is the most neutral portable amp? I want fidelity in my setup! I read that the Porta Corda MK III is the most neutral. Is this true? (I can't find it anyhow, but will worry about that later).