The Fiio E07K ANDES is the successor to the Fiio E7, with updated 24Bit/96KHz USB DAC and a powerful headphone amp. The Fiio E07K ANDES come with a host of new features including gain selection, hold key and independent bass and treble adjustments. So buy his Fiio (Andes) E07K Portable USB DAC Headphone AMP Portable Amplifier Was £69.90 Now £61.51.