In my opinion, It is not possible to archive any house sound by EQ, especially Grado's SR325e and its Reference Series...   Still, I think that you should have a listen to higher models of Grado first (325e and RSXe would be suffice), since these have a tad discrepancy compared to your SR60...

Back to when I used my phone as a primary source with Fiio E17, It constantly hissed overtime. Turning on airplane mode is the best way for me to get rid of those noises.   For your information, Sometime it depends on your phone and your cellular network. To me, my current portable amp will...

Have anyone compared the voltage output on this one with other portable amps (Cypher Labs Duet)? I have read one review saying dynamic headphones can either go to HPA-01m or Duet which make me curious about these two sonic difference with dynamic headphones   I don't have any planar magnetic...