Pass Labs Amplifier Meter meaning?

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.

It means more expense and more things to go wrong.

I received a reply from a knowledgeable source who chooses to remain anonymous:

In the XA series, the meter measures bias. From a practicality standpoint when the meter begins moving, it's an indicator the amp has reached rated output.