A clarification from me..
Beside the field failures....
Another economic reason I moved away from Fosi products was..
In my custom AV install biz, our customers rank system and product reliability the highest, and when there is a failure the cost burden of sending 1 of our techs out to troubleshoot cost me more than the Fosi amplifier itself.. So over the years being in the biz,
product reliability is the most important factor.
Just my $0.02...