dsrk
Headphoneus Supremus
I drove them with Cayin N5II which has the best bass response under $500 DAPs IMO with EQ off. The FH1 I tried was a demo unit, it might be broken but I am not sure.I haven't heard FH1, but it sounds like you want something thicc with good control, and no peaks.
E5000 has no peaks, it is thicc, but the bass control is given by the source, not by it. This means that you need a good source to drive them properly and to keep them under control