Ford 2000 E-150 Owner's Manual page 52

Controls and features
Press the TREB control then press:
to decrease the treble output
and
to increase the treble output.
Speaker balance adjust
Speaker sound distribution can be
adjusted between the right and left
speakers.
Press the BAL control then press:
to shift sound to the left and
to shift sound to the right.
Speaker fade adjust
Speaker sound can be adjusted
between the front and rear
speakers.
Press the FADE control then press:
to shift the sound to the
front and
to shift the sound to the rear.
52
SEL
BAL
SEL
BAL FADE
SEL
FADE