How do I adjust my navi volume in DISC mode only? Any other AV source is fine but CD. If I adjust the master volume manually it will be fine but then if I go to any other AV source the thing would blow my speakers. I factory reset the stupid F....no dice!

turn up the master / voice volume in the navi settings; also try turning on speed sensitive volume.

turn up the master / voice volume in the navi settings; also try turning on speed sensitive volume.

I told you I did that. But then when I switch to a different AV source the navi sound is super loud, my speakers will explode.

Return it for a different unit.