Yes, my Mojo has been here a week today unopened. My Meridian Explorer and Grado 225e are OK. They sound smooth, well detailed, with a good and often luscious tone. However it somehow can all sound a little clustered, and like it wants to dig deeper. I always thought the route for me was to upgrade headphones first to the better Grado 325e, or the RS2e. (To be honest the 225e are not as good at the price point as the rest of the Grado line up. Don't tell anyone I said that though.) Then right out of nowhere this November came the What Hi-Fi article on the Mojo. I am also pining for a DAP. The new Astell&Kern Jr just took Best Portable Music Player title with What Hi-Fi. Plus it doubles as a DAC. No fancy cables. No interference. No stacking block and tackle together. No 'making stuff work'. No carrying an expensive smartphone + £400 DAC + expensive IEMs; and then getting mugged. In fact I don't even own any IEMs. To be honest though I have spent some of the last week trying to rule out issues. I had to read all 4800 posts in this thread. I discovered the Windows phone I almost bought would not work (yet) with the Mojo. Plus I figured I might need a player that originally was equipped to play HD-audio. That's even though the DAC does the converting. Thus can I get a non HD-audio phone and put a software app onto it to play HD tracks. ......... Then I find Chord might be adding a module to the Mojo to play SD cards! Maybe I had better wait and see. I don't know what you mean by this. You asked me before but I don't understand what you are asking. You have the Mojo connected by line out and are playing music. You might want to pair e.g. a phone to the MR1 via Bluetooth. I presume if you want to switch to the phone playing music, you switch the source on the MR1. I see no reason why you need to unplug the Mojo, though I guess you'd turn it off. You could email Ruark Audio.