I just received my HA-2 today and I'm blown away. What was a weak compressed digital signal coming from my Dell laptop at work is now a very wide analog sound stage. I mean, I'm just streaming music off of youtube most of the time, so the file quality isn't even what it could be with some of the high resolution formats out there. I'm utilizing Sennheiser Momentum 2 headphones with this DAC/Amp and I think this is a very good affordable set up for anyone looking to make that jump into a mid tier headphone and nice portable unit. Anyway, just wanted to drop a note in case anyone is thinking about getting one. If you are, I don't think you'll regret your purchase at all.