2001 Subaru 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 following six operations will also result in the audio system's power being 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. 5-40