In this system 1 of the 3 1250's has gone into protection on the last six channels on two of those channels we have two pairs of speakers they were originally wired in parallel and worked fine for several months now in protection we have changed them to series still have the problem. The strange thing is the speakers sound fine. No noticable difference when in protection. This is controlled by Audioaccess PX 700's and AA keypads.

Any insight on this problem would be greatly appreciated.