Would I hear much difference?

[neozengar]

Right now I currently am using a d2 + head direct re2. Overall, I am satisfy with the sounding but the re2 is lacking in bass for me. I also have yuin pk3 which offer much more bass. I am thinking whether buying a amp like the fiio e5 would improve the SQ of the re2. Anyone has the same setup and would like to give me some suggestions? Thanks in advance!