Haven't really dig into every post in this thread, so not sure if this is already talked before.
I just noticed that on the 1st page, about the hardware spec outline, it said the CPU is a dual core 600Mhz, "designed for table and other devices". Usually CPU designed for table (I assume by "table" they mean "desktop") use will produce more heat and consume more power than portable device CPUs. I hope Fiio will fine tune their design so that the X3 will remain cool and consume less power while it is running.
Highly appreciate their feedback on their (future) customers' concerns/comments 