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Sound Bar Flex with Wireless Subwoofer

  • SJ7

Key Features

  • Dual Speaker Flexible Setup
  • Rear Surround Sound
  • Portable Bluetooth
  • Built-in Li-ion Battery
  • Vertical Positioning
The Versatile Sound Bar Flex



Flexible Design

Flexible Design

Different rooms have different needs, so the dual-speaker design of the LG Sound Bar Flex enables it to be configured in a variety of ways. However you like to enjoy movies and music, this audio package delivers.

Bluetooth Connectivity

Portable Bluetooth

For even greater versatility, one of the speakers in this LG sound system is equipped with a built-in rechargeable battery, allowing it to be placed and enjoyed just about anywhere.

Adaptive Sound Control

Adaptive Sound Control

For maximum enjoyment of various types of programming (movies, sports, games, etc.), LG-exclusive Adaptive Sound Control can automatically detect what’s playing and then enhance the clarity and impact of the audio.

LG Sound Sync SJ7

LG Sound Sync

Enhance the home cinema experience without the clutter of unnecessary cables. LG Sound Sync technology links compatible LG televisions to the sound bar wirelessly, using Bluetooth.

Wireless Subwoofer

Wireless Subwoofer

An outboard wireless subwoofer can drastically improve the cinematic audio experience, adding room-shaking bass to movies and more.

Rear Surround Yes
Built-in Battery Yes
Bluetooth Streaming Yes
Adaptive Sound Control (ASC) Yes
Sound Sync Wireless Yes
HDMI In/Out Yes
Wireless Active Subwoofer Yes
Soundbar Mode - Channels 2.1ch
Soundbar Mode - Total Output Power 320W (Secondary Speaker Using AC Power) 140W (Secondary Speaker Using Li-ion Battery)
Rear Surround Mode - Channels 4.1ch
Rear Surround Mode - Total Output Power 320W (Secondary Speaker Using AC Power) 140W (Secondary Speaker Using Li-ion Battery)
Portable Mode - Channels 2.1ch (Primary Speaker) 2.0 (Secondary Speaker)
Portable Mode - Total Output Power 160W 30W
Bluetooth Remote App (Android) Yes
Bluetooth Stand-By Yes
Auto Music Play (BLE) Yes
TV Remote Compatibility Yes
Audio Return Channel (ARC) Yes
LCD Display Auto Dimming Yes
Subwoofer Level Control Yes
Wall Mountable Yes
Adaptive Sound Control (ASC): Default Yes
Standard Yes
Bass Blast Yes
Cinema Yes
Dolby Digital Yes
DTS Digital Surround Yes
Wireless Active Subwoofer Yes
Bluetooth (ver. 4.0) Yes
LG TV Sound Sync (Bluetooth) Yes
LG TV Sound Sync (Optical) Yes
HDMI 1.4 Out Yes (1)
HDMI 1.4 In Yes (1)
Optical Input Yes (1.0)
USB Host No (Service Only)
Front 60W x 2
Subwoofer 200W (wireless)
Battery Type Li-ion Battery
Battery Capacity 5200mAh
Battery Charging Time 3hr 40min
Battery Life Up to 4 hours of playback
Soundbar Standby Power Consumption Less than 0.5W
Subwoofer Standby Power Consumption Less than 0.5W
Recommended TV Size 43" and above
Speakers (WxHxD) 13.4" x 2.9" x 4.3"
Subwoofer (W x H x D) 6.7" x 12.6" x 9.9"
Subwoofer Net Weight 9.26 lbs
Remote Control Yes
Batteries Yes (AAA)
Optical Cable Yes
Vertical Table Stand Yes
Limited Warranty 1 Year Parts and Labor
UPC 719192610132

What People Are Saying

Rated 1 out of 5 by from Very disappointed I received this sound bar 10-25-17. A few days after receiving I started getting a random humming/ buzzing sound. Shipped them to a service center, came back with same issue. Shipped them to a service center again, came back with same issue. Called LG customer support about the issue was told they will not send me a new pair ship them back to the service center for the third time. As of today, 10-21-17, they have been gone a total of 24 days and have yet to receive an email saying they have even looked at them. Looks like by the time I do get them back over half the time I have owned them they will have been either in the process of being shipped or at a service center.
Date published: 2017-12-22
Rated 5 out of 5 by from Exactly what we've been looking for in a soundbar We bought this a few days ago and I don't think we've watched TV or listened to music on any other device. The flexibility of having a front and rear speaker, the second speaker being portable with a battery, and a nice loud sub-woofer - this product has met all our needs and pairs nicely with our OLED. So far so good.
Date published: 2017-11-16
Rated 5 out of 5 by from Glad we purchased this! This was a great choice for our small space. Great value. Quality sound. Bonus: The one speaker that is portable and Bluetooth, we love taking it outside.
Date published: 2017-11-12
Rated 1 out of 5 by from Have to change sound settings constantly Got this in a package deal with my LG OLED TV. I have to basically keep it set to Stereo sound only because everything else is a nightmare to get the voices clear. I've changed every setting known to man. The detachable rear speaker can't be more than a few feet away else it just spitters and disconnects.
Date published: 2017-11-01
Rated 3 out of 5 by from OK Sound It was easy to hook up. It does not sound as good as I expected for the price. I wish I could adjust the sub woofer a little louder.
Date published: 2017-10-22
Rated 5 out of 5 by from Great Sound from a Small Unit I bought this about 2 months ago! Love it. Great sound from a small unit. Very easy to install and pair with my LG TV and cable box. Love that I can use the cable box modem to control volume. So easy to keep up with only 1 remote!
Date published: 2017-09-24
Rated 4 out of 5 by from Love! Very easy to setup. What I love about it is the 2 speakers that can be separated. My only con would be it's not as loud as I wanted it to be. The sound is great but not so loud my house is
Date published: 2017-09-12
Rated 5 out of 5 by from Awesome flexibility!! I bought this today and it exceeded my expectations.. I was looking for a speaker system that was economical and had the flexibility to be used as a surround sound system or just front speakers I could move to a room that was far from the tv. What else can I say Awesome. The sound is incredible! LG you outdid you self with this sound bar... Piece of cake to connect to my LG tv.
Date published: 2017-08-29
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We're here to support you with our product.

View SJ7 Product Support

Contact us for any support inquiries.


Ask your questions. Share your answers.
Please first review the detailed product information and help guides in the Product Support section for this product prior to posting a question.

Is the sj7 flex sound bar compatible with the spj4-s wireless speaker kit?

Asked by: Bandino
The SPJ4-S Kit is compatible with SJ4Y and SJ5Y Sound Bar Models. ^AC
Answered by: amber
Date published: 2017-12-13

I’m finding the dialogue too soft whilst music/explosion too loud. Tried shifting the woofer and changing the bass/wf/treble but doesn’t seem to fix it for some movies. Help please 

Asked by: Someonenew
If you're in need of some guidance with using your home audio system, please head to our support page at @LGUSSupport on Twitter so a specialist can help out. ^CP
Answered by: ChrisPSM
Date published: 2017-12-02

Will this sound bar and subwoofer work with this lg model 49UJ6500 that I recently just purchased from Costco?

Asked by: Throwinghoops13
There are several ways you can connect this LG Sound Bar Flex with Wireless Subwoofer, Model # SJ7 to your LG 4K UHD HDR Smart LED TV - 49" Class (48.5" Diag), Model # 49UJ6500. Both units support Bluetooth, so you can use the LG TV Sound Sync(Bluetooth) feature on the Sound Bar for wireless connection, or you can connect it with the Optical Digital Audio Input or you can connect it by connecting the HDMI OUT (TV ARC) port on the Sound Bar to the HDMI IN (ARC) on the TV ...^IFV
Answered by: LGJoel
Date published: 2017-11-16

When was this speaker released?

Asked by: JazzyUK
The LG Sound Bar Flex with Wireless Subwoofer, Model # SJ7 is a 2017 product...^IFV
Answered by: LGJoel
Date published: 2017-11-16

How do I connect my phone to the speakers, using bluetooth, when I don't have a remote control?

Asked by: Walto
Hello, your phone must be A2DP (Advanced Audio Distribution Profile) compatible. Select the input source to BT (Bluetooth) by pressing F button on the remote control or unit repeatedly. "BT" "READY" appears in the display window in order. 2. Operate the Bluetooth device and perform the pairing operation. When searching for this unit with the Bluetooth device, a list of the devices found may appear in the Bluetooth device display depending on the type of Bluetooth device. Your unit appears as “LG SJ7 (XX)” ^AC
Answered by: amber
Date published: 2017-11-14

Just purchased sound bar flex sj7. Do I have to charge the sound bar before I can use it?

Asked by: Jagz
We cannot guarantee the charge on the battery. It should arrive with some charge on it but we cannot say for certain how long that charge would last for use. ^CP
Answered by: ChrisPSM
Date published: 2017-10-28

My second speaker can't pair with the primary, the white light is on for 5 secs and then it turns to flashing red light. I tried to use the portable mode to connect it with my phone as well, it also has blinking red light and can't connect.

Asked by: JennyJ
We apologize you are experiencing this issue. Let's get you to the owners manual which will walk through manual pairing these speakers - ^CP
Answered by: ChrisPSM
Date published: 2017-10-27

Will this sound bar work with my lg tv (55ld520). It's a little bit older model. 

Asked by: Cwoody2
The LG Sound Bar Flex with Wireless Subwoofer, Model # SJ7 has an Optical Digital Audio Input that can be connected to the Optical Digital Audio Output of any TV regardless of brand, manufacture or age fo the TV. Your LG 55" Full HD 1080p Resolution LCD TV, Model # 55LD520 has an Optical Digital Audio Output that will connect to the Sound Bar...^IFV
Answered by: LGJoel
Date published: 2017-10-23
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