To properly experience our website, you will need to use an alternate browser or upgrade to a newer version of internet Explorer (IE9 or greater).

The website utilizes responsive design to provide convenient experience that conforms to your devices screen size. In order to get the best possible experience our LG.COM website please follow below instructions.

If you’re using Internet Explorer 8 or earlier, you will need to use an alternate browser such as Firefox or Chrome or upgrade to a newer version of internet Explorer (IE9 or greater).

If you’re using Internet Explorer 9 and higher, turn off your Internet Explorer browser’s “Compatibility View settings” by following steps below:

  • Right click at the top of your browser and make sure the “Menu Bar” option is selected
  • Select “Tools” from the menu bar and then select “Compatibility View settings”
  • In the pop-up menu uncheck all three boxes and click “Close”
  • Your browser window will automatically refresh and you’ll be ready to go
Skip to Contents Skip to Accessibility Help

320W 2.1ch Sound Bar Audio System with Wireless Active Subwoofer and Bluetooth Connectivity

  • LAS551H

Key Features

  • 2.1 Channel
  • Bluetooth®
  • Sound Sync Wireless
  • Wireless Subwoofer
2.1 Channel

2.1 Channel

2.1-channel audio takes your movies, TV shows and music beyond traditional stereo with the added bass kick of a dedicated subwoofer, imparting greater sonic power.



Wirelessly stream music directly from your Smartphone or other compatible device for a seamless listening experience.

Sound Sync Wireless

Sound Sync Wireless

No wired connection needed! Simply link your LG audio product with your compatible LG HDTV wirelessly via Bluetooth®, reducing the cable clutter behind/beneath your television.

Disclaimer: Interoperability and compatibility among Bluetooth devices may vary.

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.

HDMI Connectivity

HDMI Connectivity

Connect your TV and audio systems for higher quality audio and a better entertainment experience when watching your favorite movies, shows and sports. The HDMI connection transmits digital video and audio over a single cable.

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.

Channels 2.1
Total Power 320 Watts
Bluetooth Remote App (Android) Yes
Bluetooth Stand-By Yes
Bluetooth multi-phone pairing Yes, max. 3
Universal Search Yes
Music Curation Yes
Auto Volume Leveler Yes
Audio Return Channel (ARC) Yes
Dynamic Range Control Yes
3D Video Pass Yes
Music Flow Bluetooth App (iOS/Android) Yes
Front 60Wx2 (tweeter x 2)
Subwoofer 200W (wireless)
Flat Yes
Boost Yes
Treble/Bass Yes
Cinema Yes
Standard Yes
User EQ Yes
Music Yes
Dolby Digital Yes
DTS Digital Surround Yes
MP3 Yes
FLAC Up to 192kHz
OGG Up to 48kHz
Wireless Active Subwoofer Yes
Bluetooth 4.0 Yes
HDMI® Out Yes
HDMI® Input 1
Optical Input 1
Portable Audio In (3.5mm) Yes
LG TV Sound Sync (Bluetooth) Yes
LG TV Sound Sync (Optical) Yes
Remote Control Yes
Remote Control Batteries Yes
Optical Cable Yes
USB Gender Yes
Wall Mount Bracket Yes
TV Matching 40" and above
Sound Bar (WxHxD) 35.04" x 2.01" x 3.35"
Subwoofer (W x H x D) 6.73" x 15.35" x 10.28"
Soundbar Net Weight 6.2 lbs
Subwoofer Net Weight 12.6 lbs
Shipping Dimensions (WxHxD) 41.1" x 16.4" x 8.5"
Shipping Weight 23.1 lbs
Soundbar Power Consumption 27W
Soundbar Standby Power Consumption <0.5W
Subwoofer Power Consumption 33W
Subwoofer Standby Power Consumption <0.5W
Limited Warranty 1 Year Parts and Labor
UPC 719192598638

What People Are Saying

Rated 5 out of 5 by from Worth the Money! I didn't know anything about soundbars, so thought I would give this one a try. The best investment I made. Great quality and sound.
Date published: 2016-11-12
Rated 5 out of 5 by from Awesome sound! So glad I purchased this perfect addition for my awesome tv!
Date published: 2016-08-14
Rated 3 out of 5 by from Muffled sound! I have had my brand new sound bar and sub for 3 weeks. The sub is wirelessly connected to the sound bar via Bluetooth. Today I noticed that the sub is making a very muffled sound. Sounds like someone rubbing against a microphone. Can someone please tell me how to make it stop!?
Date published: 2016-08-05
Rated 5 out of 5 by from Great for my space! I have a one bedroom apartment and this system is great for my living room. I absolutely love the sound. The subwoofer is wonderful!
Date published: 2016-08-01
Rated 3 out of 5 by from Bluetooth doesnt work well I bought this in November of 2015 and ever since the day I bought it the blue tooth has been completely bad. The device cuts out even when the blue tooth device is only 5 ft away or when you walk in between them.
Date published: 2016-02-25
Rated 5 out of 5 by from Great value for the price and small footprint too! I'm not ready to buy a high end expensive sound system so I wanted to find something with good price/value that provided better sound than the default sound from the TV with two additional criteria: 1) as much wattage for the price, and 2) smaller size footprint so the sound bar didn't take up too much room or look bulky. This soundbar from LG provided everything I was looking for (and more with the additional features supported). It sync'd up great with my LG TV and I enjoy it yet everyday! I preferred this model over the other ones by LG too because it had the grill cover. Other models I saw had no grill and the speakers were exposed.
Date published: 2016-02-20
Rated 5 out of 5 by from easy and great sound for a tv. Received as a gift. Very easy to set up,hang up ,and get working.Probably not for audiophiles,but makes my LG tv sound really good.Music still sounds better on my home stereo but then its higher up on the food chain.
Date published: 2016-02-10
Rated 5 out of 5 by from Great Sound and Can Use TV Remote I was hesitant to buy this product, wasn't sure of the sound in the store with the large area, but sound is great and best part is don't have to use a separate controller. The TV Remote (Time Warner) works for sound bar too!!! Absolutely makes movie watching a much better experience!!!
Date published: 2016-02-06
  • y_2017, m_2, d_23, h_3
  • bvseo_bulk, prod_bvrr, vn_bulk_0.0
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_30
  • loc_en_US, sid_MD05169941, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_lg
  • bvseo_sdk, java_sdk, bvseo-
  • CLOUD, getReviews, 5ms

We're here to support you with our product.

View LAS551H 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.

I lost Bluetooth connection on my wireless woofer. I have a flashing green light. How do I reconnect? Sound bar is connected and I have checked all woofer settings

Asked by: EKGre
When your connection is not completed, you can see the red LED or the blinking of yellow-green LED on the wireless subwoofer and the subwoofer does not make sound. To solve the problem, follow these steps: 1. Adjust volume level of the main unit to minimum. &rdquo;VOL MIN&rdquo; appears on the display window; 2. Press and hold (Mute) on the remote control for about 3 seconds; &ldquo;WL RESET&rdquo; appears on the display window briefly and Red LED on the main unit is blinking; 3. If the LED of the wireless subwoofer already blinks in yellow-green continually, you can skip this step; Press and hold PAIRING on the back of the wireless subwoofer for more than 5 seconds; The LED of the wireless subwoofer lights up alternately in red and yellow-green; 4. Disconnect the power cord of the main unit and the wireless subwoofer; 5. Connect them again after the LED of the main unit and the wireless subwoofer is fully turned off; The main unit and the wireless subwoofer will be paired automatically when you turn on the main unit; When the connection is completed, you can see the yellow-green LED on the subwoofer.
Answered by: NeilE
Date published: 2017-02-21

Is the green light on the subwoofer suppose to be on all the time or does it turn on and off intermittently?

Asked by: Dadsadoc
We appreciate your interest in this Audio System. The green light should remain active constantly. There should be no change except in association with the loss of the Bluetooth signal.
Answered by: NeilE
Date published: 2017-01-24

How to automatically switch between 3.5 mm input and optical input. After playing from the audio cable it automatically switches from audio cable to optical, however I need to turn off BR bar back on and select the audio input for it to play again.&nbsp;

Asked by: Sintx
We appreciate your interest in this Audio System. Change the Input Setting of this device by pressing the F button (Function) on the remote control. It is this button which is to change the Function and INPUT SOURCE of the system.
Answered by: NeilE
Date published: 2017-01-16

Im alaways gettinf demo on my soundbar im unable to connect with Bluetooth as well.

Asked by: Sop 23
Our offices, in the United States, do not have specific product information units released in the United Kingdom. In order to obtain such information, it is recommended to check our subsidiary&rsquo;s website, at
Answered by: NeilE
Date published: 2017-01-16

What's the best level for bass and treble on my LG SH5. It goes from 0 to 6 just wondering what number I should have them set at.&nbsp;

Asked by: MICK Mc
Determining what the best level is for bass and treble on your LG 320W 2.1ch Sound Bar Audio System with Wireless Active Subwoofer and Bluetooth Connectivity, Model # LAS551H is discretionary. It's a personal preference. If you like heavy bass, then you will raise the level. If you like a bright sound, then you will want to raise the treble. You may also want to change the settings to suite the type of music you're listening to. For example, Classical music does not require a heavy bass setting but hard rock or reggae do. The acoustics in the room that you have the system installed in will also dictate how you set the bass. Even when watching movies, you may want to adjust the settings. Action movies with huge explosions of helicopter chases etc., may sound better with a heavier bass setting while comedies or love stories don't. You also have the Sound Effect settings that are customized settings that you may want to try if you don't feel like spending time tweaking the bass and treble to suite your needs...^IFV
Answered by: LGJoel
Date published: 2017-01-13

Is there a way to disable or password protect Bluetooth on the sound bar? Mine was hijacked by someone outside my home. Woke up to blaring music in the middle of the night.&nbsp;

Asked by: Bhylander
I apologize, but no; this model is not designed with such security measures available. Re-establishing the Bluetooth connection between this system and your own device should interrupt the access by the different user. Deactivating the system should also prevent access when not in use.
Answered by: NeilE
Date published: 2017-01-06

My subwoofer stop working I have sound but no bass what do I do

Asked by: Kirah
We regret the inconvenience you have experienced with this Audio System. It is recommended to check for the WOOFER control on the remote control, to see if this might resolve the matter. If it does not correct the situation, then the unit may require service. Please contact our Customer Interactive Center at 800-243-0000 to make proper service arrangements.
Answered by: NeilE
Date published: 2016-12-28

The display got real dim, barely can see it. How can i turn it on? I have AKB74815321 remote without the sleep button. Please advise what to do.

Asked by: Lionid
Our offices, in the United States, do not have product information for Israel. In order to obtain such information, it is recommended to check our subsidiary&rsquo;s website, at
Answered by: NeilE
Date published: 2016-12-22
  • y_2017, m_2, d_23, h_14CST
  • bvseo_bulk, prod_bvqa, vn_bulk_0.0
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_99
  • loc_en_US, sid_MD05169941, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_lg
  • bvseo_sdk, java_sdk, bvseo-
  • CLOUD, getContent, 5ms