So - temperature after 1 hour in leather case with balanced IEMs
temperature reached 43C. Today is very cold day, normally this time is around 7C more. So it may reach 50C when no air ventilation. This is measured temperature of the body.
But during today playing I found really big probably HW fault.
When playing DSD tracks then LEFT and RIGHT channels are switched!!! When playing PCM tracks then it is ok. When playing the same tracks in Foobar on PC then everything is ok.
I tried with different headphones both SE and balanced output. Headphones are ok, well connected.
Tested on tracks from audiophile test album for speaker setup which has the same tracks in 24/96, 24/192 and DSD128 format. I was surprised when I heard "channel left" from right side playing DSD.
With Fiio Q1mkII left and right are correct for all formats.
So Q5s has wrong connections inside between DAC and AMP or something like that.
@FiiO Fiio tell us something about it! This is big school fail in such expensive audiophile device. It may create big problem especially in binaural recordings.