Hello, this is my first post and I have to say in the beginning that I am from Poland and english isn't my first language.
I had FiiO E10 and I liked bass there. It had a "power", was fast and strong. I was able to hear vibrations of bass guitar. Bass drums in metal music was amazing.
But my E10 is dead, PC can't recognize it:"Unknown device". A friend tried to fix it, but it's dead already.
I bought E07K from him, but with WM8741 and AD8066. I like the details, intruments' separation, even vocals are clear, but.. a bass.. The bass is deep, but it's "quiet", without life, not "punchy". I don't like bass guitar as I liked it in E10. Bass drums haven't that power as in E10, lacking bass dynamics.
I am listening to the metal and I don't need a lot of bass, but I need it punchy, strong and fast as in E10. My girlfriend now has to increase bass in E07K to 6-8, because "it is so flat" - that's what she told exactly. But I noticed that when I increase it even to 2 or 4 there is more bass, but it is lower quallity and still not punchy, strong and fast.
Do you think this boring bass is because of AD8066? What OPAMP would be better? Without loosing details. Or the E07K just has bass like I described and I can't improve it?