Subaru 2001 Legacy Owner's Manual page 226

B ON-OFF switch
The audio system can be turned on by pressing the POWER button
when the ignition key is in the ACC or ON position. Pressing the
POWER button once again will turn off the power. In addition, the fol-
lowing six operations will also result in the audio system's power be-
ing turned on:
D Pressing the FM/AM selector button
D Pressing the Tape Mode selector button
D Pressing the Disc Mode selector button (provided that a CD has
been inserted or that a CD multi-changer is connected to the system)
D Inserting a cassette
D Inserting a CD
D Pressing the Traffic information button
B Volume control
HBS040BB
Turn clockwise to increase the audio-system volume.
Turn counterclockwise to reduce the audio-system volume.
B Tone control
Bass and treble control is operated using the same knob. Use that
knob for the separate adjustment of low pitch and high pitch sounds.
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