Panasonic VIERA TC-55DX700C Ehelp page 162

Equalizer
(150Hz/250Hz/500Hz/1kHz/2kHz/4kHz/8kHz/12kHz/Reset to defaults)
Adjusts the frequency level to suit your favorite sound quality.
This function is available when
●
Select the frequency and change the frequency level by using the cursor
●
button.
To enhance the bass sound, raise the level of the lower frequency. To
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enhance the treble sound, raise the level of the higher frequency.
To reset the levels of each frequency to the default settings, select Reset
●
to defaults by using the cursor button, and then press the
Gray-out when using Home Theater.
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Balance
Emphasizes the left/right speaker volume.
Gray-out when using Home Theater.
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Sound mode is set to User.
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button.