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Subwoofer Rear-Panel Controls - JBL SB300 Quick Start Manual

Powered soundbar with powered subwoofer
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suBWooFer rear-Panel controls

Pairing Switch
Status LED: Indicates the subwoofer's operational status:
Lights blue continuously when the subwoofer is on and linked to
the soundbar.
Slowly flashes blue when the subwoofer is on and the wireless link
is not established between the subwoofer and the soundbar.
Rapidly flashes blue during the wireless pairing process.
Lights amber continuously when the subwoofer is in the Standby
Turns off when the subwoofer's Power switch is in the "Off"
Level Control: Use this control to balance the subwoofer's volume
with that of the soundbar. Turn the knob clockwise to increase
the subwoofer's volume; turn it counterclockwise to decrease the
subwoofer's volume.
Cutoff Control: This knob adjusts the subwoofer's cutoff between
40Hz and 200Hz.The higher you set the Cutoff control, the higher
in frequency the subwoofer will operate and the more its bass will
"overlap" that of the soundbar. This adjustment helps achieve a
smooth transition of bass frequencies between the subwoofer and the
soundbar for a variety of different rooms and subwoofer locations. See
Subwoofer Cutoff Control , on page 7, for more information.
Phase Switch: This switch determines whether the subwoofer driver's
piston-like action moves in and out in phase with the speakers in
the soundbar. If the subwoofer were to play out of phase with the
soundbar speakers, some of the sound waves produced by the
subwoofer or soundbar could be canceled, reducing bass performance
and sonic impact. This phenomenon depends in part on the relative
placement of the speakers in the room. See Subwoofer Phase Switch ,
on page 7, for more information.
Wireless Pairing Switch: Press this switch to initiate wireless pairing
between the subwoofer and the soundbar. See Pairing the Units for
Wireless Operation , on page 6, for more information.
Power Switch: Set this switch to the "On" position to activate the
subwoofer. In normal operation, this switch will be left in the "On"
position. See Turning the Subwoofer On and Off , on page 6, for more
If you will not be using the subwoofer for an extended period – for
instance, if you're going on vacation – set the Power switch to the
"Off" position.
Power Cord Connector: Connect the included power cord here and
into an active, unswitched AC outlet. See Power Connections , on page
5, for more information.
IMPORTANT: Do not connect the power cord to an AC outlet until you
have made and verified all other connections.
Power Cord



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