Alright then an amp probably isn't necessary. What do you suggest I do about the termination of the default value on the A900X? The high quality silver part impedes it from plugging in to a protected (with a bumper) nexus 4.

Thinking of buying a pair of these. Would you guys suggest an amp? It'd be my first set headphones towards the audiophile world, and I've seen that some people recommend amps for some headphones. Also, since my source would largely be a Nexus 4 (while I'm out) and a Xonar DG 5.1 at home, given...