I have a Chord Mojo and I have just now added a Astell & Kern AK70 as a music source to replace the digital output of my Samsung Note 8 phone. I have output the AK70 using the provided AK mini USB-USB Cable which I have then attached to a Female USB - mini USB to connect into the Mojo DAC. So far I see no better music quality at all compared to either the AK player alone (giving a warm clear sound) or the Mojo alone (giving a rich and separated sound imo). If anything the combo just sounds clinical bright and lacking any character; and I mean that in a bad way I.e. not 'reference'. If I was in any doubt, the quality indicator light on the Mojo is showing Red which means worst quality possible. Maybe this means I have hooked it up wrong or maybe they just don't work so well together. If I cant make an improvement I would be tempted to sell both pieces and maybe put it towards a £700 Chord 2Qute (rrp £1000 - seems great value) or upgrade to a £1200 Chord Hugo (rrp £1400). Not convinced the Hugo 2 is the best value as it still retails at the rrp of £1800. Can anyone help?