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.
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.