iFi iPurifier 3
USB can be both an incredibly useful and an incredibly problematic way to listen to music. As a data conveyor, USB has top-notch sample rate, and is a common input/output found in a wide variety of components. However, USB suffers from a whole host of noise and "jitter" issues, which can drastically detract from the audio quality. Thus iFi to the rescue once again, with a nifty and inexpensive add-on that can make shocking improvements to you overall sound!