I hate to hijack this thread for a little bit, but I’m wanting to do a similar upgrade to my Tron Legacy Pro. I bought a pair of 4” Kickers and replaced the 8 ohm backbox stock speakers and get no sound out of them. The cabinet speaker works fine and the original 4” speakers worked again when I reinstalled them. I wonder if there is something different about the SAM CPU board that doesn’t like the Kickers. Maybe because they are 4 ohm?