Panasonic GX740Z Ehelp page 98

Cut Off Frequency:
Adjusts the cut-off frequency of sub woofer signal output.
The frequency output to the sub woofer is less than the set cut-off
●
frequency.
The frequency can be adjusted from 100 Hz to 400 Hz.
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Confirm the actual sound volume from this TV and sub woofer and
●
adjust the volume.
Reset Sound Defaults:
Resets Sub Woofer Adjustment to the default settings.
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