just received my pha-1a, tried to test with my laptop which only use realtek alc serie 2, but i couldnt found the differences? i felt so hopeless, but when i tested it with my ip6p i could hear clearly the differences, i even have 2 of my friends tested it afraid of my expectation clouding my ears becs the laptop trial but no, they also hear the differences. its clear pha-1a is way better than ip6p dac. will try it with nwz tomorrow. thank you for the advises.