speakers - M2
sub woofer - EP100

connected to computer running linux OS opensuse 15.2 with PulseAudio on.
volume control = pavucontrol
pulseaudio equalizer and paprefs installed.

I notice that my speaker balance is not quite equal and would like to be able to balance it.
I have tried doing this via pavucontrol, but cannot find any balance control in pavucontrol.

Can anyone suggest where or how can accomplish altering the speaker balance.

thanks

Give speaker toe-in a shot. Toe in the side that sounds weaker.