Fried amps with Wetsounds WS-240SQ?

My installer was tuning and I was there with him. He adjusted the amps then thought we could get a little more by adjusting the internal auxillary gain on the WS-240. He first switched the led color from blue to red then started turning the L and R gain up a little and the interior speakers and sub that's running off an Alpine 5 channel shutoff and then REV 10 tower speakers which are powered by an ARC 600.2 shutoff. He turned the gain back to the factory setting on the WS-240 and slowly turned the volume back up. Still no music from the interior speakers but there was some from the tower speakers but it sounded like garbage and was distorted. So what the hell happened? Did both of my amps just get fried by barely turning the internal gain up on the ws-240?