Mark Furneaux | Modding and Repairing My Fiio A3 Headphone Amplifier @TheUbuntuGuy | Uploaded February 2017 | Updated October 2024, 36 minutes ago.
I usually use a set of 'test songs' when I get new audio gear, but this time I didn't. That's why I didn't notice the stereo was off since what I'm listening to now doesn't have much in the way of directional sound.

I have a second channel:
youtube.com/channel/UCN3Dgu6CVBcecDkc5DmIIqw