Calibrating bias and DC offset

[Sandm0n]

Hi All,


I'm trying to calibrate the bias and DC offset of my Musical fidelity B1 amplifier.
The B1 has 2 adjustment pots on each channel.

Beside the fact that the readings are "all over the place" and not stable the DC offset that I measure on one channel of the speakers outputs appear in minus and the other channel measured in "+", like one channel is in reverse polarity.
Why does it happens?

 

[Mooly]

DC offsets can be of either polarity depending on the cause of the imbalance. Perfectly normal.

 

[Sandm0n]

Thank you very much for clarifying it.