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320W 4.1ch Streaming Sound Bar with Wireless Subwoofer

  • NB3740

Key Features

  • Premium Content - Hulu Plus®, Netflix®, YouTube® and more
  • LG Apps
  • Wireless Subwoofer
  • Built-In Wi-Fi®
Premium Content

Premium Content

Access premium content from providers like Hulu Plus®, Netflix® and YouTube® directly through the NB3740.. Stream your favorite movies and TV shows, enjoy the latest games, apps and more. LG connects you to the content that you and your family want.

Disclaimer: *Internet connection & some subscriptions required and sold separately.

LG Apps

LG Apps

The LG Smart World app store built into your LG Smart TV is loaded with fun and useful new apps for you to search, download and enjoy, taking your entertainment experience to the next level.

Disclaimer: *Internet connection & some subscriptions required and sold separately.

Wireless Subwoofer

Wireless Subwoofer

Add sharp sonic kick and thunderous power to all of your entertainment with our wireless subwoofer. It's easy to set up, and you won't need to run a wire to connect it to your audio system.

Built-In Wi-Fi®

Built-In Wi-Fi®

Connecting your LG A/V product to the Internet and the world of online content is easy when you have Wi-Fi® built in. If you have an existing wireless broadband network, setup is simple, and you don't need to worry about messy wires.

Disclaimer: *Internet connection required and sold separately.



Wirelessly stream music directly from your smartphone or other compatible device to your LG Sound Bar for a seamless listening experience.



An HDMI output port on a sound bar? Because this is a Smart sound bar capable of streaming movies and TV shows, it offers HDMI out, to pass its high-quality video signal on to the TV for all to enjoy.

Wall Mount Included

Wall Mount Included

Sometimes the wall is the best location for your LG sound bar, if for example your TV is wall-mounted and you want to place the speaker directly beneath. Luckily, handy mounting hardware is included.

Vudu Yes
Netflix Yes
Hulu Yes
CinemaNow Yes
Youtube Yes
M-GO Yes
Amazon Yes
Pandora Yes
Crackle Yes
Spotify Yes
Rhapsody Yes
Accuweather Yes
Vtuner Yes
AP Yes
Google Maps Yes
Facebook Yes
Twitter Yes
Viewster Yes
Channels 2.1
Total Power 320 Watts
Automatic Power on/off Yes
A/V Sync Yes
USB Host Yes
Audio Return Channel (ARC) Yes
External HDD Playback Yes
Smart Share (DLNA) Yes
MPEG4 AVC (H.264) Yes
SMPTE VC1 (VC-9) Yes
DivX/DIvX HD Yes
M4V Yes
3GP Yes
MPEG-1 Yes
MP4 Yes
Front 40W x 2
Surround 40W x 2
Subwoofer 160W (wireless)
Standard (By pass) Yes
Music (Natural) Yes
Bass Yes
D.Loud(Loudness) Yes
Dynamic Range Control Yes
Dolby Digital Yes
DTS 2.0 Yes
MP3 Yes
FLAC Up to 192kHz
Wireless Audio Streaming via Bluetooth® Yes
HDMI® Out Yes
HDMI® Input Yes
Optical Input Yes
Remote Control Yes
Batteries 2 (Size AAA)
Optical Cable Yes
USB Gender Yes
Wall Mount Bracket Yes
Power Consumption 30W
Standby 0.5W
TV Matching 47" and above
Subwoofer (W x H x D) 6.7" x 14.2" x 12.4"
Shipping Dimensions (WxHxD) 43.6" x 9.5" x 19.4"
Net Weight 15.9 lbs
Shipping Weight 26.5 lbs
Limited Warranty 1 Year Parts and Labor
UPC 719192592506

What People Are Saying

Rated 5 out of 5 by from Great Sound Love this unit!! The sound is fantastic for my new the wireless part hate running wires....very good sound quality!!
Date published: 2015-07-31
Rated 4 out of 5 by from Great sound bar for the price Easy set up out the box, sound quality is great for the living room with my LG 55". Movies are even better now with the theater like sound. Regular tv is also upgraded. With bluetooth, streaming music from my devices is awsome!!!!. If you dont want to spend a ton of money on popular name brand sound bars this is the sound bar for you!!!! Great sound bar for the price. Dont wait. Get one, youll be glad you did.
Date published: 2015-07-12
Rated 5 out of 5 by from Excellent Product This was such an excellent purchase a fantastic addition to my home television experience. Setup was very easy especially the connection to the wireless sub-woofer which was completely seamless. The sound went beyond my expectations. I would recommend this product to anyone that wants surround sound at a reasonable price. The sound is equivalent to systems costing hundreds of dollars more.
Date published: 2015-06-17
Rated 4 out of 5 by from Good product for the price Good product for the price. I was disappointed, however, that it did not come with both cords for the TV
Date published: 2015-06-06
Rated 4 out of 5 by from sound bar I small tv room room.but with this sound bar ,it really fills the roomlike at a movie havig lots of fun with the quality effects.
Date published: 2015-05-20
Rated 4 out of 5 by from Sounds great,, but quirky sometimes First off, I need to say, Killer Sound! It's 10x better than what my brand new expensive smart TV puts out. I have a really nice surround sound system in the same room, for use with my blue-ray/DVD player, and this sound bar is almost as rich sounding (nowhere near the base tho) I am very happy with the sound performance. I am fairly well experienced with media connectivity and setup, and this was not easy to get right. I don't mean just getting it to work (that's easy), I mean getting "everything" to work with it. You have to connect it to the TV via HDMI first to set it up. I hate that it does not come with a paper users-manual; it's accessible ONLY via the TV with the sound-bar remote. Supposedly, if you are to pair this LG soundbar with an LG smart TV, the soundbar remote will control both units. Well, that's just 50% true. Also, if you want to use other components like a cable or sat-tv box, dvd, blueray, your going to have a basket of remotes and intense input/output routing issues to manage. BE PREPARED to spend time in the User Menu screens, and gaining an in-depth understanding of Inputs and Outputs, HDMI verses Optical cable, WiFi compatibility and signal strength, BlueTooth connectivity, Power "ON" sequencing, and more. You will not just attach this unit and casually sit back and enjoy all the functions. Here are a few things to note: 1. The auto on/off function only works if you use the Optical cable (make sure your TV has a port) The user's guide and programming functions are only accessible if you use the HDMI cable. So use them BOTH if possible. You have to be careful here, most TVs don't have 4 or 5 HDMI ports and you may need the space for other components. 2. If you are connecting this to a new Smart TV, you already have all the SMART functions (apps, WiFi connectivity to your home network) so don't waste time trying to set this up to do the same) 3. This is an awesome bluetooth speaker for your iphone/ipad, but you must change the input back and forth from Optical to bluetooth. It's worth the effort! 4. Keep the Subwoofer within 3ft of the soundbar to insure it can pair with it easily. You can play with moving it around the room, but pairing will be sketchy. 5. If you ARE going to utilize the SMART functions, a strong WiFi connection is crucial. Even though my home has an awesome WiFi signal throughout, I had to get a WiFi signal booster to keep my system from constantly stalling, buffering streamed movies.
Date published: 2015-05-16
Rated 5 out of 5 by from Great Sound Great sound, not true Surround sound, but great for the price. Only problem is connecting to the internet even after getting WI-FI extender. Something that should be looked at.
Date published: 2015-04-18
Rated 2 out of 5 by from extremely disappointing I bought this soundbar to bring my ne 4k tv alive, but sadly this soundbar was a huge disappointment. The tv speakers were of better quality. The pricetag is very overpriced.
Date published: 2015-03-26
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We're here to support you with our product.

View NB3740 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.

My LG soundbar used to work fine with no problem. Then recently the subwoofer started cutting in and out. And now I can't get them to pair. The subwoofer just has an orange/red light on it now. HELP!

Asked by: N8te
We regret the inconvenience you have experienced with this Sound Bar system. It is suggested to UNPAIR the device before attempting to RE-PAIR the system. If this does not resolve the matter, please contact our Customer Interactive Center at 800-243-0000.
Answered by: NeilE
Date published: 2016-06-15

Where can I get a wall mounting bracket? I believe I lost it in a move.

Asked by: Ecam
You can buy mine I don't use it 
Answered by: Castortroy
Date published: 2016-04-30

My new LG sound bar keeps switching off every 20 minutes or so and with it the TV.  Is there a setting for this. Stuart. 

Asked by: Stuart 1
Our offices, in the United States, do not have specific product information units released in Britain. In order to obtain such information, it is recommended to check our subsidiary’s website, at
Answered by: NeilE
Date published: 2016-04-08

Sub light is green and pairing with bar but sub isn't working.  I unplugged both for several min numerous times...they always pair but only the bar plays music.  

Asked by: Tessmp1
We regret the inconvenience you are experiencing with your sound system. Please contact our Customer Interactive Center at 800-243-0000 that we might troubleshoot the matter with you.
Answered by: ShenaS
Date published: 2016-03-01

My smartphones won't pair with or play thru my soundbar

Asked by: Rbowrx
We regret the inconvenience you have experienced with this device. Additional information will be needed in order to determine the cause of this matter. Please contact our Customer Interactive Center at 800-243-0000 for assistance.
Answered by: NeilE
Date published: 2016-01-08

How is the best way to set up soundbar so that there is no sound delay?  Is there an adjustment?  Currently, I have an older plasma (42pj250?) and soundbar (NB3470) hooked up with Optical cable.  HDM1 goes from soundbar IN to TV.  Thanks.

Asked by: SimonG
Our offices, in the United States, do not have product information for Canada. In order to obtain such information, it is recommended to check our subsidiary’s website, at You may also contact our Canada offices at 1-888-542-2623.
Answered by: NeilE
Date published: 2015-11-06

We have the LG Sound Bar NB 3740 and are unable to get to the settings.  When we hit the home button on the remote, nothing happens

Asked by: leisa
We regret the inconvenience you have experienced with this Sound Bar. The ability to view the SETTINGS menu of this unit will depend upon how the device is connected to the TV. The video signal of the SETTINGS menu will only be seen if the Sound Bar is connected to the TV using the HDMI cable.
Answered by: NeilE
Date published: 2015-10-19

Size of Compatible HDTVs?

Hello, Will this soundbar "appropriately" accommodate a 60" Plasma HDTV? Thanks!
Asked by: Shockwave
yes! i have a 65" and it works great
Answered by: lumi64
Date published: 2015-03-20
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