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Press the remote’s Bass Boost button to enhance low-frequency 

performance, resulting in bass with more impact, which you may prefer 

while watching movies or listening to music. The OSD will display “Bass 

On” as the sound mode. There is no harm in experimenting with this 

control. Pressing the Bass Boost button again will return the soundbar’s 

normal low-frequency performance.

Bass Boost  

Button

Use the subwoofer’s Level knob to balance the bass with the rest of the 

sound. Play music or movies that you are familiar with, and adjust the 

subwoofer’s Level knob so the bass sounds balanced on both music and 

films. Listen to several different music recordings and film soundtracks 

that contain strong bass passages, and find a setting for the Level knob 

that doesn’t over-emphasize the bass or make it sound weak.

Once you find a setting for the subwoofer’s Level knob that balances 

the bass with the rest of the sound, you shouldn’t have to change it.

The subwoofer’s Crossover control adjusts the subwoofer’s cutoff 

between 40Hz and 200Hz. The higher you set the Crossover 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.

To set the Crossover control, listen for the smoothness of the bass. If 

the bass seems too strong at certain frequencies, try a lower Crossover 

control setting. If the bass seems too weak at certain frequencies, try a 

higher Crossover control setting.

This switch determines whether the subwoofer’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 soundbar and subwoofer could 

be canceled out at some frequencies, reducing bass performance 

and sonic impact. This phenomenon depends in part on the relative 

placement of the soundbar and subwoofer in the room.

Although there is no absolutely correct setting for the Phase switch, in 

most cases it should be left in the “0°” position. When the subwoofer is 

properly in phase with the soundbar speakers, the sound will be clearer 

and have more impact. It will make percussive sounds like drums, 

piano and plucked strings sound more lifelike. The best way to set the 

Phase switch is to listen to music that you are familiar with and adjust 

the switch so that drums and other percussive sounds have maximum 

impact.

You can program the soundbar so it will respond to your TV remote’s 

volume up, volume down and mute commands. This will let you control 

both the soundbar and your TV with a single remote. Before you begin 

to program the soundbar, have your TV remote in hand.

1.  Press and hold the soundbar’s Surround button until the button 

begins flashing amber.

Press and Hold Until 

Button Flashes Amber

2.  Hold your TV’s remote approximately 12” (30cm) from the indicated 

locatation at the front of the soundbar and aim the remote directly at 

the soundbar:

TV 

Remote

30cm 

(12")

•  Press the TV remote’s volume up button while pressing and holding 

the soundbar’s Volume + button. If the programming was successful 

the soundbar’s Surround button will change from amber to solid 

white for one second, then will return to flashing amber.

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SB 400 Service Manual

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A)  Hold Down Soundbar’s 

Volume + Button

B)  Press TV Remote’s  

Volume Up Button

•  Press the TV remote’s volume down button while pressing and 

holding the soundbar’s Volume – button. If the programming was 

successful the soundbar’s Surround button will change from amber 

to solid white for one second, then will return to flashing amber.

A)  Hold Down Soundbar’s 

Volume – Button

B)  Press TV Remote’s 

Volume Down Button

•  Press the TV remote’s mute button while pressing and holding the 

soundbar’s Volume + and Volume – buttons at the same time. If the 

programming was successful the soundbar’s Surround button will 

change from amber to solid white for one second, then will return to 

flashing amber.

A)  Hold Down Soundbar’s 

Volume + and – Button

B)  Press TV Remote’s 

Mute Button

3.  When you’re finished, press and hold the soundbar’s Surround 

button until the button stops flashing amber.

The soundbar will now respond to your TV remote’s volume and mute 

commands.

Frequency response:

38Hz – 20kHz (–6dB)

Midrange transducers:

Two 2-1/4" (57mm) cones per channel

High-frequency transducer:

One 1" (25mm) dome per channel

Amplifier power:

60 watts peak per channel

Power requirement:

100V – 240V, 50Hz/60Hz, 60W

Power consumption:

<0.5W (standby); 60W (maximum)

Dimensions (H x W x D):

3-3/4" x 43-5/16" x 2-1-2"  
(95mm x 1100mm x 64mm)

Weight (shipping):

7.3 lb (3.3kg)

Low-frequency transducer:

One 8" down-firing cone

Amplifier power:

100 watts

Enclosure type:

Ported

Power requirement:

100V – 240V, 50/60Hz, 100W

Power consumption:

<0.5W (standby); 100W (maximum)

Dimensions (H x W x D):

14" x 13" x 12-5/8"  
(355mm x 329mm x 320mm)

Weight (shipping):

23.1 lb (10.5kg)

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SB 400 Service Manual

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The Bluetooth word mark and logo are registered trademarks and are owned by the 
Bluetooth SIG, Inc., and any use of such marks by HARMAN International Industries, 
Incorporated, is under license.

Manufactured under license from Dolby Laboratories. Dolby and the double-D symbol 
are trademarks of Dolby Laboratories.

All Rights Reserved. Features, specifications and appearance are subject to change 
without notice.

Part No. 950-0475-001 Rev: A

www.jbl.com

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SB 400 Service Manual

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SB 400 Service Manual

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