Cheap headphones or not, I absolutely love how this sounds with my Grado SR60i. But... ...they still need a clean power source. That is, when I feed input via Wyrd, I like the sound. When I feed input directly from my laptop computer, the sound is not quite there, to my ears. I've recently acquired a taste for an even more odd pairing, of the Grado SR60i with the Meridian Prime (and power supply). That's about a 50 times ratio between MSRP of the source and the destination. But to my ears, the power is even more clear and clean. In summary, the issue I have with the Explorer2 is it is only best when fed clean power. Other USB DAC/AMP solutions are less susceptible to poorer power feeds. This may be what you're hearing?