Yeah, I purchased Poweramp a year ago and since I've been using two different models of headphones, but both cannot be enjoyable enough without precise EQ. I've been using the graphic EQ from Poweramp until three weeks ago, when I switched to a new phone, thus making me capable of pushing further my equipment's potential. Using Neutron trial right now, and yeah, that little tweaks between really enhances the experience. I really urge the developers to implement the parametric EQ, Max had created the best audio player on Android to this day, but it can be really improved with the adjustable bandwidth/band frequency. Just a little comment I needed to communicate, never entered to this forum before and I created my account just to say this, hope I can participate a lot more in the future!