Pass Labs Amplifier Meter meaning?


On a Pass Labs amplifier, what exactly does the meter measure?
tvad
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.
Given the reputation of Nelson Pass, I am amazed and a little disappointed to hear these meters are cosmetic only.

Agreeing that the meters look great, and in fact, are more than a small part of my lifelong desire to own a pair of Pass mono blocks.

But why not add some functionality? What a bummer.
I was "told" that it is current draw. The harder I drive my X-250, the higher up the scale the needle moves.
It would seem the meter is of no practical purpose to an end user other than to verify that the amplifier is in "operate" mode.