CCG writes - "The iFi GO Bar is an excellent option for the discerning audiophile who wants a high-powered headphone amp in a tiny, portable form factor. It's also very light, and seems like it should survive being in a pocket or laptop bag without issue. If you are currently suffering with a phone that doesn't have a headphone jack, or if you want to upgrade your laptop's audio dramatically, the iFi GO Bar is an excellent choice. The balanced 4.4mm connection might just be the best sounding headphone out that I have available to me at this time, and makes my planar headphones sound shockingly close in resolution to my Koss ESP electrostats. I'm extremely impressed. Who would have thought that my best sounding headphone amp would be only slightly larger than a pack of gum? If you're in the market for a truly portable high-quality DAC and headphone amp in this form factor, give the iFi GO Bar a close look. I doubt you'll be disappointed."