I'm happy with the dx50 and iem's or yamaha pro 500's for portable, looking to amp to my HE400's at home so size not really a problem, pb2 anyone? I loved my ipod 5g and arrow combo but the dx50 is a step up on its own, do my HE400 just not need it? Sorry if this all sounds a bit noobie, cheers.
for sure you will need amping if you want to drive the HE400. I tried (for fun) running my HD650 and HE500 from the headphone out of my DX50, and it struggles big time. I had to set it on high gain, and 75% volume to get it to 'listening' levels. Not good. Ran it through my Bifrost/Lyr through the coax out, and its a different story. Much much better =)