Mercury Mountaineer 2001 Owner's Manual page 62

Controls and features
Bass adjust
The bass adjust control allows you
to increase or decrease the audio
system's bass output.
Press the BASS control then press:
to decrease bass output and
to increase bass output.
Treble adjust
The treble adjust control allows you
to increase or decrease the audio
system's treble output.
Press the TREB control then press:
to decrease treble output and
to increase 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.
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BASS TREB
SEL
BASS TREB
SEL
BAL FADE
SEL