Very good review. Please update when you have tried it with the balanced output if you will hear any difference. The new version has few more options such as the Amanero USB module and the H mode for driving the HE-6.

Thanks! I actually just got finished making a balanced cable with my HD600, and the added power is immediately noticeable. I haven't do done extensive, volume matched testing yet but the balanced output seems to have deeper bass in comparison to the single ended out. I will report back with more impressions once I have finished my 400i and Alpha Dog cables.  

Any updates on listening tests for us here?