Which would have the best bass response and eq-ability for overall loudness and loudness below 60 hrtz? This is a basshead question, accept I'm also asking about sonic clarity and acoustical properties and nuances someone would have heard within these. I plan on doing mostly bass line...

Clearly, I don't know how to post this into the new member thread. Feel free to tell me how and I will delete this and repos it there. To begin, I'm new here and have watched the forum a long time. I like science and I'll try to learn more about the science and things of technology with audio...

I regularly brows this site, and know a bit about audio, although I know much less than some. I am curious about portable audio players and DACs for a cell phone, since I seem to have a weakness: using Sure 215 headphones and HD700 Senn. headphones, Ive noticed a serious difference in quality...