Panasonic TH-65EZ1000U Ehelp page 271

Basic settings
Bass
Adjusts level to enhance or minimise lower, deeper sound output.
Watching > For best audio > Basic settings
Treble
Adjusts level to enhance or minimise sharper, higher sound output.
Watching > For best audio > Basic settings
Equaliser
Adjusts the frequency level to suit your favourite sound quality.
Watching > For best audio > Basic settings
Balance
Adjusts volume level of right and left speakers.
Watching > For best audio > Basic settings
Surround
Selects surround sound settings.
Watching > For best audio > Basic settings
Bass Boost
Enhances the effect of bass sounds.
Watching > For best audio > Basic settings
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