"It has a very nice small physical enclosure with lots of features, it is well-suited for your average headphone and especially IEMs, and can "fix" bad audio from laptops, desktop motherboards, and cheap smartdevices, while also offering the bonus of headphone surround."
Evshrug - Head-Fi.
Creative Sound Blaster E1 Portable Headphone Amplifier review by Head-Fi - Full review.