I found one other topic on this with zero answers. Wondering if anyone else has this issue. Just installed my unit thursday and everything is working fine except navi volume. I have the voice turned to 100% and must have all windows up and really listen to hear what it's telling me. I see several people claiming it's too crazily loud yet mine is too crazily quiet. Like i said I have it turned all the way up, does anyone else know of any other settings? or have smiliar issues?