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Better TV — not just better TV sound

LG's ultra-slim NB3730A powered sound bar is more than just an easy way to upgrade the audio performance of your flat-panel TV. This system includes LG's smart app interface. That means you can download apps to bring your favorite web-based entertainment services right to your TV. Apps for many popular services are pre-installed, including Netflix®, Hulu Plus™, Pandora®, Rhapsody®, and more (subscription required for some services). This system is a convenient way to add Internet capabilities to a TV that doesn't have those features built-in, and you'll give your favorite TV shows and movies a nice audio boost, as well.

Flexible connections

You can hook up the sound bar to your TV using a digital HDMI A/V cable. If you've got an LG TV, using that type of connection means you'll also be able to use the TV's remote to operate the sound bar. Or you can hook up the sound bar to older TVs using optical digital or analog minijack connections.

A host of wireless conveniences

Built-in Wi-Fi makes it easy to tap into the aforementioned web features of this sound bar system, since you won't need to run an Ethernet cable from your router. (You'll need a wireless network to use Wi-Fi, of course.) And if you're like most folks these days, you probably have a smartphone or tablet that you use from time to time for music. Whether you download tunes to your device, or stream them from the Internet using a cloud-based service like MOG, Spotify®, or Pandora, the NB3730A's built-in Bluetooth means you can pair your device for convenient wireless music playback.

And here's another convenient wireless feature: the included subwoofer connects to the sound bar wirelessly, so you can place it anywhere in your listening room that's within range of an AC power outlet and enjoy punchy bass.

Product Highlights:

    Sound bar:
    • LG smart apps for access to web-based entertainment services (subscriptions may be required; requires HDMI connection to TV)
    • built-in Wi-Fi for easy connection to your wireless home network
    • built-in Bluetooth® for wireless audio streaming from compatible smartphones, tablets and laptops
    • DLNA-certified for streaming content to the sound bar from compatible devices and computers on your network
    • 80 watts RMS x 2
    • both channels feature a 1" dome tweeter and two 2" midrange woofers
    • Dolby® Digital and DTS® surround decoding
    • HDMI output
    • includes wall-mounting bracket for easy mounting underneath wall-mounted TVs
    • sound bar is sized to match 47" flat-panel TVs
    • 3D Sound mode helps create immersive surround-like effects
    • selectable Dynamic Range Control helps make Dolby Digital content sound clearer at low volumes
    • 40-7/8"W x 2-13/16"H x 2-1/8"D
    • requires AC power
    • built-in 140-watt amplifier
    • bass reflex (ported) design
    • 7"W x 14-5/16"H x 12-7/16"D
    • wireless technology allows placement near any AC power outlet in the viewing room
    • HDMI monitor output (Audio Return Channel sends TV tuner audio back to sound bar via HDMI monitor connection)
    • 1 optical digital audio input
    • Ethernet port for a wired connection to your home network
    • USB input for playing music from a portable player
    • remote control
    • optical cable and USB cable included
    • desktop pedestal and wall mount bracket included
    • warranty: 1 year parts and labor
    • Our 60-day money-back guarantee

    Sound bar speakers: room-filling sound with less clutter

    Add big sound to your TV without a roomful of speakers. Sound bars require minimal space and wiring, and their sleek designs complement today's flat-panel TVs. Most sound bars have their own built-in amplification, so you won't need to use a home theater receiver. Some models use advanced surround processing and carefully aimed speaker drivers to simulate the effects of a full home theater audio system.

    LG NB3730A Reviews

    Average Customer Review:

    1 Review

    Great Value

    Written by: Ron M from Ron Manwiller on July 8, 2013

    Crutchfield Customer Review (What's this?)

    So much better than the speakers on the LG TV that I bought at the same time. Simple set up. Love the wireless sub. Can't see but you sure can hear it. I have the sound bar in our master bedroom so it doesn't have to play super loud. It does play clear and clean.

    Pros: Good sound, easy set up.

    Cons: None. Good value for the money.

    Hands-on research

    What's in the box?

    Download owner's manual

    • Soundbar speaker
    • Wireless powered sub
    • AC power adapter (w/ attached 58" DC cord)
    • 5' AC power cord
    • Remote control (AKB73775701)
    • 2 "AAA" batteries
    • 59" Optical digital cable
    • Wall-mount bracket
    • 2 Wire ties
    • Owner's Manual/Nero MediaHome 4 Essentials CD-ROM
    • Simple Manual
    • Wall-Mount Bracket Template
    • Warranty Card
    • Netflix brochure

    Features and Specs

    Enclosure Sealed(spkr)/Ported(sub)
    Design ---
    Pieces in System 2
    Color Black
    Tweeter 1" Dome (2)
    Midrange 2" Cone (4)
    Woofer None
    Separate Subwoofer Yes
    Subwoofer Driver 5
    Surround Sound Decoding No
    Dialogue Enhancement ---
    Auto Volume ---
    4K Video Compatible No
    Audio Return Channel ---
    Remote IR Passthrough No
    Works with TV Remote (IR) ---
    Control by App ---
    Bluetooth Connectivity Yes
    Wi-Fi No
    Wall-mountable Yes
    Mounting Bracket Included Yes
    Surface Mount Stand Included Integrated
    Speaker Parts Warranty 1 Year
    Speaker Labor Warranty 1 Year
    Amplifier Parts Warranty 1 Year
    Amplifier Labor Warranty 1 Year
    System Frequency Response Not Given
    Powered System Yes
    Sound Bar RMS Power 160
    Subwoofer RMS Power 140
    Inputs and Outputs
    Mini Stereo Audio Inputs None
    RCA Stereo Audio Inputs None
    Optical Digital Audio Inputs 1
    Coaxial Digital Audio Inputs None
    HDMI Inputs None
    HDMI Outputs 1
    USB Port No
    Subwoofer Output Wireless
    Sound Bar (inches) 2-13/16H x 40-7/8W x 2-1/8D
    Sound Bar Weight 5.5 lbs
    Subwoofer (inches) 14-5/16H x 7W x 12-7/16D
    Subwoofer Weight 12.2 lbs

    Product Research

    Audio/Video Section
    Network, Bluetooth, & USB Integration
    Convenience Features

    Audio/Video Section

    Soundbar Speaker: The LG NB3730A soundbar speaker features a two-way speaker system with two 1" dome tweeters and two pair of 2" cone woofers, powered by an 80-watt x 2-channel amplifier. The soundbar speaker delivers clear midrange and treble with little distortion. The sound bar does not feature a grille. All drivers are exposed.

    Wireless Powered Sub: The wireless powered sub houses a 5" side-firing woofer inside a bass-reflex cabinet with a front-firing port. The 5" woofer is powered by a built-in 140-watt amplifier for deep, punchy bass. Since the powered sub is wireless, there are no cable connections and the sub can be placed anywhere in your listening room.

    HDMI (v1.4) Output: The LG NB3730A soundbar speaker system is fitted with a single HDMI output to connect to your TV's HDMI input for audio/video transfer. The HDMI (v1.4) output supports Dolby Digital/DTS/PCM audio signals and 480p/720p/1080i/1080p video signals.

    • ARC (Audio Return Channel): The system's HDMI output supports Audio Return Channel (ARC), which sends the TV sound back to the soundbar. Your TV's HDMI input must also support ARC.
    • 3D Pass-Through: The HDMI output also supports 3D pass-through of online 3D content from LG Smart Apps (Internet connection required).

    Optical Digital Input: If your TV does not support the HDMI ARC function, the LG NB3730A soundbar speaker system also offers an optical (toslink) digital audio input that supports PCM, Dolby Digital, DTS audio formats.

    TV Aspect Ratio: The HDMI output's TV aspect ratio can be set to 4:3 Letter Box, 4:3 Pan Scan, 16:9 Original, or 16:9 Full.

    DRC (Dynamic Range Control): The LG NB3730A provides dynamic range compression for Dolby Digital content to make the sound clearer when the volume is at a low level. The DRC feature can be set to Auto, On, or Off.

    A/V Sync (Audio Delay): When receiving audio signal from your TV, sound and images may not be matched. In this case, the AV Sync function lets you adjust the audio delay time between 0 and 300m/sec.

    Sound Effects: You can select a Sound Effect mode that best suits the content you are playing.

    • Natural: Enjoy comfortable and natural sound.
    • Bypass: Multichannel audio signals are played according to the way they were recorded, bypassing additional processing.
    • Bass Blast: Reinforces the bass sound effect from the front left and right speaker, as well as subwoofer.
    • User EQ: You can adjust the sound by raising or lowering the levels of the unit's 4-band EQ (60Hz, 300Hz, 2kHz, 10kHz).
    • 3D Sound: 3D sound delivers sound creating a wider soundstage, so you can enjoy more immersive and cinematic surround sound.

    Network, Bluetooth, & USB Integration

    Wired or Wireless Network Connection: The LG NB3730A soundbar speaker system can be connected to your home network via its Ethernet (LAN) port or built-in WiFi. The network connection offers access to your PC movie/photo/music files & online LG Premium Apps. A 10 Base-T or 100 Base-TX LAN port is required for a hardwired Ethernet connection (use a standard LAN cable with this TV; Cat5 or better with a RJ45 connector). A wireless connection requires a home network with an 802.11 b/g/n access point (802.11n recommended) and internet connection; supports WPS, WEP, and WPA security.

    LG Smart Apps: LG Smart TV Apps allows you to access a variety of online services and content directly through the LG NB3730A, via its network connection. LG Smart Apps is an easy way to access limitless content, thousands of movies, customizable apps, videos, and browse the web; all organized in a simple to use interface. LG Smart Apps offers pay and free-of-charge instant streaming of movies, weather, videos, and photo album services.

    Note: Visit LG Smart TV for the latest  compatible apps. Internet connection & subscriptions required. A minimum connection speed of 1.5 Mbps is required. For the best playback condition, a connection speed of 4.0 Mbps is required.

    DLNA Certified: This soundbar speaker system is a DLNA Certified digital media product that can play movie, photo, and music content from your DLNA Certified network device and DLNA server (such as your Windows 7 or 8 PC). The Digital Living Network Alliance (DLNA) is a cross-industry organization of consumer electronics, computing industry and mobile device companies. Digital Living provides consumers with easy sharing of digital media through a wired or wireless network in the home. If you don't already have DLNA software on your  computer or server, simply download the Nero MediaHome 4 software from the included CD-ROM onto your Windows or Mac computer.

    File Type File Description
    Audio MP3 (32-320kbps; 16-48kHz), WMA 32-192kbps; 32-48kHz), WAV
    Video XVID, MPEG1 SS, H.264/MPEG-4 AVCHD, MPEG2 PS, MPEG2 TS, VC-1 SM (WMV3)
    Photo JPEG, PNG, GIF (less than 4,000 x 3,000 x 24-bit/pixel; or 3,000 x 3,000 x 32-bit/pixel)

    WiFi Direct: When using WiFi Direct, you can connect directly with other devices without using a wireless router. You'll be able to wirelessly transfer personal content (such as music, movies, & photos) to the LG NB3730A without connecting to your home network. WiFi Direct completely bypasses your WiFi access point/router, so it's easy to set up. Streaming of copy-protected content and other certain formats are not supported.

    Gracenote Media Database: This unit can access the Gracenote Media Database through its network connection and load the music information so that Song title, Artist name, Genre, and other text information can be displayed on-screen.

    Bluetooth Audio Streaming: Built-in Bluetooth technology lets you wirelessly stream audio from your Bluetooth enabled smartphone, tablet, digital audio player, or other BT device to the LG NB3730A. The LG NB3730A soundbar speaker system is Bluetooth A2DP (advanced Audio Distribution Profile) compliant; meaning it allows you to stream music from your Bluetooth enabled device, but not control it (no metadata transfer either). You will still control playback of your music and view song/artist information from your Bluetooth audio device. Your Bluetooth enabled device must be paired with the NB3730A before operation. Only one device can be paired with this system (it does not support multi-pairing).

    Note: Due to the differences in Bluetooth technology, some Bluetooth enabled devices may be incompatible, function improperly, or may not support all features when used with LG NB3730A.

    Front-Panel USB Port: The Soundbar speaker system features a front-panel USB (type-A) port for playback of video, still image, and music files stored on a connected USB memory device. The player can support USB external hard disc drives (up to 2TB) and USB mass storage class devices (up to 32GB). The USB storage device must be formatted as FAT 32 or NTFS file system.

    File Type File Description
    Audio MP3 (32-320kbps; 16-48kHz), WMA 32-192kbps; 32-48kHz), WAV, FLAC
    Video XVID, MPEG1 SS, H.264/MPEG-4 AVCHD, MPEG2 PS, MPEG2 TS, VC-1 SM (WMV3)
    Photo JPEG, PNG, GIF (less than 4,000 x 3,000 x 24-bit/pixel; or 3,000 x 3,000 x 32-bit/pixel)

    Convenience Features

    Remote Control: The LG NB3730A includes an IR remote control for wireless operation of the soundbar system. The remote is pre-programmed to control basic functions (Power On/Off, Volume Up/Down, AV Input,  & Channel Up/Down) of select LG flat-panel TVS, and can be programmed to control other manufacture televisions ( Zenith, GoldStar, Samsung, Sony, Hitachi).

    SIMPLINK: Some functions of this system can be controlled by your LG TV's remote control when this unit and your LG SIMPLINK compatible TV are connected through a HDMI connection. The NB3730A system can also be set to automatically power On/Off with your LG SIMPLINK compatible TV.

    Note: To operate SIMPLINK, an HDMI cable over Version 1.3 with CEC function should be used. This system may work with devices with HDMI-CEC support, but only devices with the "SIMPLINK" logo are fully supported.

    On-Screen Display: The LG NB3730A soundbar speaker system features an on-screen display through its HDMI output. You'll be able to display and adjust various audio/video settings, as well as select from a wide variety of online content.

    Auto Power Off: The unit automatically turns off if it does not sense and audio signal and control command for approximately 20 minutes.

    Mounting Options: The LG NB3730A's soundbar speaker can be either be table-top or wall mounted. The LG soundbar speaker can simply be placed on a table, shelf, or stand thanks to its integrated rubber feet. The supplied wall-mount bracket gives you the option of mounting the speaker on your wall (mounting screws not supplied). The soundbar speaker can be centered above or below your TV.

    Software Update: You can update the LG NB3730A with the latest software to enhance the product operation and/or add new features via its network connection. The tested NB3730A contained software version BD1.682.30112.C (as of 5/15/2013). Visit LG's Support Site for the latest firmware/software updates.

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

    Customer Q&A

    2 questions already asked

    We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Krissy  Jun 29, 2014 ]  Staff
    For a replacement power adapter you will want to contact LG parts. You can find information on this here: [ Jeff  Dec 12, 2013 ]  Staff