Years ago I had an Aune DAC/headphone amp; I'm thinking it may have their first USB amp, but I cannot remember for certain. Regardless, I can remember hooking the thing up and being utterly underwhelmed by it, additionally, it had a lot of little glitches, such as the line-out not working, or only working partially.
I was completely disappointed in the product and wanted a refund. However, as I discovered, the problem wasn't the Amp, but rather the power supply: it simply wasn't delivering the right amount of power for the Aune to perform as it should. Since this incident, I don't think I've ever had an issue with a miss-matched power supply, but that is in part because I now pay attention to this, whereas I used to think along the lines of, "If the little lights come on, it's working."
So as a general question to those who have a lot more experience with headphone amps than I, how important is the power supply in terms of sound quality? Consider for a moment that my aforementioned experience could be considered a stupid mistake: I was using the wrong power cable, and this could mess up any electronic device; fine. However, is there actual merit, in terms of sound quality and overall performance, to tweaking one's power supply?
Edited by andrew7316 - 6/9/12 at 11:15am