[Lifeguy]

I was wondering what would be a good headphone amp to enhance the bass of the Shure SE420 IEM's. I was thinking about the iBasso D2 Boa, but Im not sure since Ive never tried it out.

Anyone have any suggestions?

 

[Detritusdave]

The Fiio E3 has a sizeable bass hump, and is cheap as hell...

 

[krmathis]

We have a dedicated sub-forum for portable amplifiers!

Portable Headphone Amps - Head-Fi: Covering Headphones, Earphones and Portable Audio

You are much better off in there...