Subaru 2009 Impreza Navigation System - Manual (Page 163)

Audio and Visual 163
Setting the audio
NOTE
• Selecting (DEFAULT) gets "+" back to the center position.
• The setting of the sub woofer level is available only when the sub woofer is
connected. (See Page
166 .)
• The larger the numeric value of the sub woofer level, the bigger the sub
woofer volume.