-I have the same fear with the CEntrance M-8. It will be powerful enough to handle high-end full headphones such as Audeze and the Sennheiser 800. I hope the balance is good at low gain and low levels.
-XLR cables are balanced because they are grounded on both ends of the connection, right? It has X/LR at both termini for a total of three wires for each mono signal: Positive, Negative, Ground. With the Westone connector, there are only two connections. What difference does 4 wires make if they merge into 2 termini?
The one I tried was the new lower gain version and I found it to be more or less useless with IEMS. It sure is spectacular with the Hd800 and HE500 though!