Jensen VX7021 Operation Manual page 21

The Audio is used to turn the Subwoofer output ON or OFF and
to select a Subwoofer crossover frequency.
- Touch ON or OFF to turn the subwoofer output ON or OFF.
- Touch a crossover frequency (80Hz, 120Hz or 160Hz) to
set a cut-off frequency for the subwoofer's low-pass filter (LPF).
The clock appears in the top right corner of the screen during certain operations.
- Touch the Date icon and use the or icons to set the day, month, and
year. After setting the date, touch Save. The date will appear to the right of the
Date option.
- Touch 12Hr to set the clock display to 12 hour time intervals using
AM and PM. Touch 24Hr to set the clock display to a 24 hour time interval (or
military time).