Hello guys, I have problem with my rx8 after building from zero LF speakears doesnt play, amplifier in the doors are okay, speakers are okay, main amplifier to. When I was building it, wiring from radio to bose amp are from system with navi unit, but there is no navi in my car. The point is, I've heard that navi system can block lf audio channel is that true? If yes, is there any way to bypass that?