If you've decided it is due time to finally time to do away with the onboard audio on your mobile computer, wanting something that makes your music collection worth listening to, then you can turn to ASUS for that as well. The Xonar U3 is a compact USB sound card, not much bigger than a flash drive. The goal is to provide a product for the person who is constantly on the go, loves to listen to their music, but isn't going to settle for the integrated solution any longer. So exactly how good can such a tiny device actually be, can it really deliver anything close to what a larger sibling Xonar can? We plan to answer that, so sit back and dive in!