When I recently went from the old Outlaw 990 to the 976 I actually forgot that there was an "trigger" cable that went from my 990 to my Outlaw 7125. When I first hooked up the 976 it wouldn't work with my amp. I was not hearing any audio and the light on the 7125 did not turn blue when I turned on the 976 like when I had the 990. Then I noticed the trigger cable attached to my 7125. Strangely when I connected the trigger cable from the 976 to the 7125 it still did not work. I was so happy to see that when I disconnected the trigger from both the 976 and 7125 it works perfectly without the trigger. Can anyone tell me if Loosing something by not using the trigger? I honestly don't know what function the trigger serves.