HiFiMAN touts this headphone as great for direct play from portable devices—and I'll agree, it does play very well directly from a tablet or phone. Pretty nice not to have the burden and expense of having to carry around a portable amp, but at $1800 it doesn't really seem like a more affordable solution. And then, it's an open headphone while most portable cans are sealed to get rid of environmental noise. So...this is a flagship headphone for use with portable devices indoors? I'm not sure what to think...let's work through the details.