Finally made some time to look at the suspected ADA1250 distortion issue. Connected up my scope to the center channel and over a few sessions (watching a few hours here and there) I finally got it to start distorting again. Anyway definitely the ADA1250 ... although now that I proved it ... it decided to completely die ... So something was going and finally went ... I guess on the positive side it's going to be easier for Axiom to diagnose now.

While the ADA1250 is out of service ... I'll repurpose the ADA1000-8 to run the center, bed surrounds, and mid tops (the front and rear heights will be the only casualties during the wait)