Hi I just bought a 2008 Outlander RF with MMCS screen. The radio is quiet. Radio, music on hd is sorta loud at max volume. BUT the AUX and NAV voice are super quiet at max volume of 45. I own a 2007 Outlander no screen with rocksford fosgate amp RF and this thing is loud.

This system on the 2008 MMCS is supposed to be way louder and its almost as if something is stopping the amp from outputting full power or something. I swapped the 30A fuse between the loud 2007 and quiet 2008 but still nothing, same result. If anyone has nay suggestions on what is going on and how to resolve this it would be greatly appreciated.

Next step for me is to swap the amps between the cars. But i suspect there is something else going on. Thank you everyone for your help.