The Creative SoundBlaster E1 is a portable AMP and a standalone DAC. This is the first of its kind in Creative’s portfolio. Creative already boasts plenty of DACs in its arsenal – Both internal and external. What makes this DAC different from all the others is that it doubles up as a portable headphone amp as well. With 25 hours of claimed battery life it makes it very versatile as a headphone amp and its small size is an added bonus. Another bonus is that it supports two headphone outs at the same time.
Creative SoundBlaster E1 Portable Headphone Amp Review @ HardwareBBQ