[Elecraft] K3 phones - separate left/right volume adjustment?

[Karsten Beyer]

Hello, this is Karsten, DL1QC,

I´m slightly handicaped in hearing on left ear, so I hear CW with K3  
always a litte bit out of the middle. Is there an option or procedure to  
adjust the level of the stereo phones left/right separately?
vy 73 es tnx for all
de Karsten - DL1QC