levels tab through windows sound settings

Im mostly using the headphones through my PC and not through a DAP. sadly, lowering the left driver audio is not a great solution for prolonged use like i need. the audio doesnt stay at "12 o'clock", sometimes it goes back to being louder on the left or even sometimes louder on the right driver...

Hello all, I have been suffering from audio imbalance issues for quite some time now, the left channel is slightly stronger/louder then the right one. at first i thought it may be a faulty pair of headphones so i bought a new pair of dt990 pros and im running them through a fiio k5 pro dac/amp...