IemLover
New Head-Fier
I did what you said, at 2.5mm balanced output and no noise was heard at maximum volume level. I wanted to update firmware with my friend's computer, but it already had the latest firmware installed.Listen when you are not plying any music... If it is total silence you are OK. Check and let us know...
It appears from the looks of the cables you have mine are different... But maybe this is because my sparrow was shipped from Europe.
iemLover