Originally Posted by jasonxff
so the signal out from the x3 after this adapter plugged in is digital or analog?
It's digital even before it goes into that adapter - it has a dedicated Coaxial port, unlike the combo earphone analog+SPDIF optical on laptops. It's just that, for a mobile device, it uses a mini-jack instead of the single RCA jack for coaxial. They included the adapter so anyone can just hook it up to their home systems straight away; anyone who would use this, for example, strapped to a portable DAC-Amp would probably go ahead and have a coaxial cable fabricated with a 3.5mm on one and and an RCA on the other to minimize the bulk. Then again, I can imagine this to be rare - the X3 is essentially the E17, so I can't imagine the gains to hooking it up to an Ibasso D12 for example would be worth hauling both of them strapped together as opposed to a battery recharging pack elsewhere (another pocket in the pants, jacket, bag, etc).