Theres no FIE in the menu anywhere. I wasnt aware theres an option for rear speakers...theres no power button on the hu though. Its avic n2 navigation unit. Only way to turn it off is by taking off the face plate.
So I was figured out how to get into the initial menu to select the rear channel settings and it was already set to FULL instead of subwoofer, so I'm concluding the hu is defective which sucks cuz the best buy warranty on it expired just two months ago lol