Harman JBL CINEMA SB400, Service Manual

Bluetooth

 button (soundbar only):

 Press this button to play the 

audio stream from a paired 

Bluetooth

 device through the soundbar. (The 

Bluetooth

 Source Indicator LED will illuminate when a paired 

Bluetooth

device is the active source.) Press and hold this button to force the 
soundbar into the 

Bluetooth

 pairing mode. See Bluetooth

 Operation,

 on 

page 7, for more information.

Bass Boost button (remote control only):

 Press the remote’s 

Bass Boost button to enhance low-frequency performance. Pressing 
the Bass Boost button again will return the soundbar’s normal low-
frequency performance.

SUBWOOFER CONTROLS AND CONNECTIONS

Subwoofer 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.

Crossover 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 

Crossover control,

 on page 8, 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 8, for 

more information.

Wireless Pairing switch and LED:

 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.

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linked to the soundbar.

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wireless link is not established between the subwoofer and the 
soundbar.

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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 

information.

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 
Switch

Subwoofer Level

Control

Crossover

Control

Phase

Switch

Wireless Pairing

Button

Wireless Pairing

LED

Power Cord
Connector

CINEMA SB400