After complete replay of 2 books - which are provided in English, German, Chinese and French is not provided, for equipment sold in France- I eventually find the proper setting in the audio output menu drive X 1 .
In fact it is necessary by- pass the X1 audio output to connect directly X1 and Fiio EO7K Andes. Attention this operation must only be used for an amp of the brand, more must no longer connect headphones in this otherwise configuration would grill the helmet connected!
Since I made this manipulation I find excellent quality sound, low pêchus, wide stereo envelope and precise a
amazing power level for my AKG K242 HD driver. I also use sondMagic E 10 outside, the sound is clear and precise.
Most are therefore an excellent, once the default configuration -exit helmet - changed, aesthetics and excellent finish.
The least: too small fabric pouch, a bag with a belt loop will be a plus. the price of the cable which is excessive in Fiio
and minimal supply of cables, which requires a purchase to cover an extension possibilities.