Fujitsu ECLIPSE CD8443 Owner's Manual page 88

How to operate the Sound Adjustment Mode
There are 10 Mid & Hi-Frequency locations (5 + 5) available for
the parametric equalizer.
The Parametric Equalizer is divided into two groups Mid & Hi.
Any frequency assigned is highlighted in White, and is
unavailable for use elsewhere.
Bands selected are grayed out in the diagram to show how
they are in use and otherwise unavailable for reuse.
Bands in black are unused (available) and can be assigned to
within their respective bands (Mid or Hi parametric locations).
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