Honda GOLDWING GL1800/A 2015 Owner's Manual page 111

Audio Systems
Treble:
To select the Treble control, push the MODE knob/button until ''TREBLE''
(''Treble'') is displayed
control.
• To emphasize treble — turn the MODE knob/button clockwise.
• To reduce treble — turn the MODE knob/button counterclockwise.
(Models not equipped with
Navigation System)
108
Audio Systems
(page 97). Then, within 5 seconds, change the treble
(Treble level ranges from 6 down to 6.)
(Models equipped with
Navigation System)