I probably didn't see more than a handful of the CA amps. I don't remember having to set the bias on any of these but I likely set them as I do for other amps (by current draw) and checked for distortion. Someone else may have the factory specs for this.
Understood. First here too. I did find this YouTube video of a CA 3.0. He shows how as the amp warms up the bias changes a bit and he targets 0.060v.
Setting Bias on a modified Soundstream Reference 300 class A - YouTube
Setting Bias on a modified Soundstream Reference 300 class A - YouTube