Dialog comes through the left, right, and center channels with surround sound. Music and sound effects come out all 4 with subwoofer.
1) Check settings for volume in the setup menus
2) pull the unit and make sure no wires came unplugged.
Lou, Laura, & Freya the wonder dog
2008 GMC Sierra 3000HD Crewcab SB Allison Duramax
2019 Flagstaff 8529FLS - Pullrite 3300
HAM CALLSIGN - KC3FFW