The left and right speakers are not balance in terms of volume. The right speaker has a weaker volume. I don't know how to calibrate it because it only has 2 knobs at the back namely the "high" knob and the "low" knob compared to other studio monitors that have volume knobs/controls for each speaker. In this case, Eris 3.5 has no volume knobs. Please help me. Thank you!
Note: I already use a TRS cable for both left and right speakers.