FiiO X series music players X1II, X1, X3II, X3 Mark III, X5II, X5III, X7, X7 Mark II and the DAC/amp E17K utilize a 11-pin micro USB port, and may realize exclusive docking expansion functions such as amplification and charging.... Buy. Fiio has been around for roughly 9 years now, and have made very steady progress with their products. Their latest release, the ‘ALL NEW X1’ is an updated version of their best-selling player, the original X1.
The K5 from Fiio is a high quality headphone amplifier and DAC with an integrated dock for Fiio audio players, such as the X1, X3II, X5II, X7, and E17K.... FiiO K5 Dock. The K5 is the latest docking station from FiiO. It is compatible with the X1, X3ii, X5ii and X7, as well as the E17K. With an 11pin micro USB port this allows you facilitate exclusive docking expansion functions such as amplifications and charging.
I have KEF 300 USB digital speakers. They will not play sound when connected through the USB 3.0 Dock. I have to have them directly connected to the laptop, X1 Carbon, or they will work through a USB hub that is directly connected.