The LG S70TR is an outstanding, speaker-packed sound bar which delivers an amazing 5.1.1 ATMOS sound experience worth far more than its modest price point. Its combination of features, sound quality and power is simply unmatched by any other sound bar system in its price class.
All great TVs, no matter the brand, are really just a beautiful visual delivery system. The speakers in even very expensive TVs are just not comparable to the display. The solution is to add a supplemental sound bar to your TV to replace those pitiful little speakers built in to it, extending the audio range of the speakers and delivering deep bass. A good rule of thumb is to spend at least half of what you spent on the TV and ideally, two-thirds or more of the cost of the TV.
The next issue is what kind of system to buy (2.0, 2.1, 3.1, 5.1 etc.). Those numbers indicate how many channels of stereo are created. 2.0 is traditional (left/right) stereo, 2.1 adds a separate sub-woofer, 3.1 adds a center channel to the left/right speakers and the subwoofer, 5.1 includes two left/right speakers up front, a center speaker, a subwoofer and two more left/right speakers positioned next to or behind where the listener sits. These systems are designed to utilize speakers at the same height as the listeners’ ears.
But in 2012 Dolby Labs introduced a new surround sound technology which added a third dimension to the sound experience through the use of “object-based audio.” Sound is projected with “height” speakers to a point above the listener which greatly adds to the impact and realism of big budget blockbuster movies. Rain falling or aircraft soaring through the sky feel as though they are really overhead, rather than simply coming from the screen. Dolby Atmos typically implements this technology through a 7.1.4 speaker arrangement. The “4” refers to the number of speakers which create sound from the top of the room (two front (left/right) height speakers plus two rear (left/right) height speakers.) Another version of this type of fully-immersive sound creation is DTS-X which uses a somewhat different approach but the same speaker arrangement. Dolby Atmos and DTS-X have become the new standards for premium movie sound.
The LG S70TR 5.1.1 sound bar effectively simulates the full 7.1.4 speaker arrangement with some very clever engineering.
Consider this fine combination of features:
• LG S70TR Soundbar (Model S70TR-AUSALLK)
• 5.1.1 speaker system with four individual speaker enclosure components
Main Sound Bar
• 6 speaker drivers: Front Left (2), Center (1), Front Right (2), Center Top (1)
• 6 30 watt amplifiers: 180 watts of total amplification power
• 37.4” wide x 2.5” tall x 4.5” deep
• Weight: 6.6 pounds
Sub-Woofer Speaker
• 7” driver with 3” rear bass port
• Wireless connection
• 220 watt amplifier
• 7.9” wide x 14.8” tall x 11.2” deep
• Weight: 12.7 pounds
Rear Surround Speakers (Left and Right)
• Rear Left and Rear Right
• Wireless connection, 315” wired connection between speakers
• 2 50 watt amplifiers: 100 watts of total amplification power
• 3.9” wide x 6.9” tall x 4.7” deep (each)
• Weight: 2.6 pounds (each)
• 500 watts of total combined amplification power
• Frequency response range: 32 Hz to 17k Hz
• Supports Dolby Atmos, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, DTS-X, DTS Digital Surround, DTS-HD Master Audio, DTS-HD High Resolution Audio, PCM
• Inputs: Optical Digital, eARC HDMI, HDMI, WiFi, BlueTooth 5.1 (SBC, AAC)
• Output effects: AI Sound Pro, Bass Blast, Cinema, Game, Music, Sports, Standard
• Lag-free gaming response time (VRR/ALLM)
• Clear Voice Plus
• Optimized for integrated use with LG QNED televisions
• WOW Interface (combines LG QNED speakers with S70TR speakers)
• Remote control included
• Voice feedback to confirm settings
• Wall and TV mounting brackets included
• Warranty: One year parts and labor
In the box are the 7” wireless sub-woofer, the primary sound bar itself, two wireless rear surround sound speakers, three power cords, a sleek remote control, an HDMI cable, a pair of wall brackets for the main sound bar and a set-up book. The four speaker units are all beautifully finished in black with a slight peak on the surface with the speakers.
Set-up is easy. Just plug in the power cords to the sub-woofer, one of the two surround speakers and the main sound bar. Then connect the included speaker wire from one surround speaker to the other. The speaker wire is quite long (over 26 feet) so the two surround sound speakers can be placed nearly anywhere in the room. Next, attach an HDMI cable from the eARC HDMI port on the sound bar to the eARC HDMI port on the television. If you have other devices attached to the TV (such as a Blu-Ray player, game system, cable box, etc.) you can leave those HDMI cables as is. Or, you can route one of those HDMI cables through the sound bar. However, in either case the sound bar will take over the audio function from the TV as long as it is attached to the eARC port.
There is also an optical connection port on the sound bar but optical connections typically do not provide the range of audio needed for more complex audio such as Dolby ATMOS. You can also connect to the sound bar with Bluetooth. It supports Bluetooth 5.1 AAC so iPhones can easily connect and deliver their full sound range through the system.
The main sound bar is 37.4 inches wide and packed with 6 individual speaker drivers. There are five speakers facing you, a 4 inch oval mid-range woofer and a 2 inch tweeter each for the left and right channels, plus a 2 inch tweeter for the center channel. On the top in the center is a 2.5 inch mid-range speaker. This effectively provides the “height” information generated by Dolby ATMOS audio. Each of the speakers is powered by a substantial 30 watt amplifier (a total of 180 watts) which give plenty of punch.
The compact height of the sound bar (2.5”) is a real plus for those who have their TVs standing on a video table. It should not block the screen of any such TV.
The sub-woofer has a front-firing 7 inch driver supplemented by a 3 inch rear bass port. It is powered by a substantial 220 watt amplifier. The two surround speakers each have a 3 inch full range driver powered by a hefty 50 watt amplifier. Both the sub-woofer and the surround speakers have a green LED on the front to indicate that they are connected to the sound bar (red when disconnected.)
The eight pre-programmed sound modes map the input to the speakers in different ways. “Standard” is a simple reproduction of the original format, “Cinema” creates immersive 3D sound output from any input, best for movies. “Gaming” emphasizes the sound effects present in most video games. “Music” adjusts the bass and treble to appropriate levels for most music. “Sports” attempts to recreate the soundscape of a stadium. “Bass Blast Pro” pumps up the bass. “Clear Voice Pro” keeps spoken dialog intelligible by adjusting the center channel level independently. No more wondering what that character just said as the explosions were going off! After trying all of the sound modes I decided I liked the Surround mode best and left it on that setting. Finally, “AI Sound Pro” attempts to adjust the soundscape to match the content automatically.
OK, so enough about the impressive technical details, how does it sound? Given the modest price of this sound system, one word: INCREDIBLE!!! Press the “on” button on the slim remote, select a sound mode and you will be immersed in sound. The first thing you will notice is that deep rich bass which had been absent from your TV speakers. You can turn of the volume on the sub-woofer to floor-shaking levels if you wish! Next, the overall sound quality is superb, very clear, distortion-free with excellent midrange and highs. The remote can adjust the treble and bass level as well as the volume of each speaker individually. I have a $1,000+ 7.1.4 sound bar and surround speakers from LG’s main South Korean rival and I can honestly report that the S70TR, at about one-third the price, outperforms that system!
To truly appreciate it, access YouTube videos which showcase Dolby Atmos and DTS-X. Sit in a chair, directly in front of the sound bar and with the surround speakers behind you. Feel the sound move from the front, over you, around you, behind you – a completely immersive experience. The system does an amazing job of reproducing the full range of both Dolby Atmos and DTS-X sound files. Your home will finally reproduce that movie theater sound which you really want. And since both Netflix and Amazon Prime have incorporated Dolby Atmos into their best series, those services will be an even better bargain.
If you have one of LG’s excellent QNED televisions you get even better sound, thanks to the WOW Orchestra feature. This integrates the speakers on the television to those controlled by the sound bar to deliver an enhanced soundscape. The QNED TVs also allow you to attach this sound bar directly to the bottom of the TV with the included brackets. But this sound bar system works superbly with all TVs.
What don’t I like? The main sound bar has an LED display when you change a setting. A full LCD display on the sound bar would be far better show all settings. To access the more detailed settings you need to use the LG Soundbar app and connect the remote to the sound bar by Bluetooth. You really need to download the full owner’s manual (or access it through the LF Soundbar app) to fully understand how to use all of the features.
But, the bottom line is that the incredible sound and amazing setup simplicity of the LG S70TR make it a superb choice for an ATMOS audio system. It is an excellent value for serious video fans who want to enrich their audio experience to theater quality. You will find that this modest investment truly produces excellent returns of auditory enjoyment!

This produces a very nice sound. It was very easy to set up and delivers a crisp clear surround sound.

LG sound bar for the price has a great movie sound quality for at home pleasure. Pair great with a large LG tv.

Wrote review
Beautiful sound
Easy installation and connection