Panasonic CQ-C8803U Manuel D'instructions page 20

Sound Control
The rear speaker can be used as a substitutional
subwoofer when a subwoofer is not connected.
Holding down [MUTE] (SBC-SW) for 2 sec.
or more toggles SBC-SW on and off.
Off (default)
Notes:
¡ If ON is selected, the settings of subwoofer level
adjustment and subwoofer low pass filter are activat-
ed. (a
¡ SBC-SW is not changeable when CS AUTO is enabled.
(a page 18)
20
CQ-C8803U
page 31)
On
Lights when activated.