Wow a30 pro has got my he6se v2 singing! very noticeable vs the a50s but i haven't done any formal tests. Even with my d50 rca as a source with some flacs im getting to 2 and even 3 oclock so I think the balanced dac is a good idea. For some reason spotify plays much louder and is fine at 12 oclock or less. This is a great end game for around 1000$-1400 depending on your dac.