Panasonic CQ-C700U Operating Instructions Manual page 19

The rear speaker can be used as a substitutional
subwoofer when a subwoofer is not connected.
Holding down [SBC-SW] for 2 sec. or more
toggles SBC-SW on and off.
Off (default)
Lights when
SBC-SW is
activated.
Notes:
¡ If ON is selected, the settings of subwoofer level
adjustment and subwoofer low pass filter are activat-
ed. (a page 28)
On
CQ-C700U
CQ-C700U
19