Ford 2003 Crown Victoria Owner's Manual page 32

Entertainment Systems
Bass adjust
The bass adjust control allows you
to increase or decrease the audio
system's bass output.
BASS
Treble adjust
The treble adjust control allows you
to increase or decrease the audio
system's treble output.
TREB
Speaker balance adjust
Speaker sound distribution can be
adjusted between the right and left
speakers.
BAL
32
2003 Crown Victoria (cro)
Owners Guide (post-2002-fmt)
USA English (fus)