Pass Labs Amplifier Meter meaning?

On the XA series, it appears to have no meaning. I never got any movement on my meter while playing music. Someone said if it starts moving you are close to clipping. If you get the answer from Pass, let us know.

I used to own the X250 amp and if I remember correctly the meter indicated the mode of operation. So up to the 12 o'clock position the amp is running in class A. Beyond the 12 o'clock position it is running in class A/B. Not a 100% sure about that though.

That makes sense as the XA is pure Class A.

I was told by Pass Labs that it reflected/measured bias. When changing from class A to class A/B the bias meter "bounces".

X.5 series amps - meter stays still means amp is operating in Class A. Usually that stand-still is at approximately 11 o'clock meter position. Once the meter starts moving, it means the bias is switching to A/B.

On XA series amplifiers, the meter, as far as I know, is there for looks only, since the XA series amplifiers are pure Class A operation only.