Skip to main content
  1. Home
  2. Audio / Video
  3. Evergreens

Digital Trends may earn a commission when you buy through links on our site. Why trust us?

Our LG SJ9 soundbar setup and unboxing guide makes installation a cinch

Add as a preferred source on Google

Often when buying a soundbar, you’ll end up eschewing breadth and depth of sound in favor of value and effective space management. Not so with LG’s Dolby Atmos-enabled SJ9, which combines virtual surround sound with the distinctive Atmos ceiling-firing drivers, creating a massive, enveloping soundstage without requiring you to set up several individual speakers. Our LG SJ9 soundbar setup and unboxing guide will make installation a cinch, bolstering your home theater in no time at all.

What’s in the box?

In addition to the soundbar and the wireless subwoofer, you’ll get:

  • Wall mounts and a template
  • Cable management ties
  • An optical cable for digital connection
  • A remote with batteries
  • Some product literature
Recommended Videos

The power supply is built in, so there’s no need for an external cable. You won’t get an HDMI cable either, though at this point, most of us have enough of those bad boys lying around the house anyway.

Hardware setup

You’ll find all the necessary ports and jacks in the rear of the soundbar, in a centrally located alcove. There’s an aux-in jack (in case you want a second subwoofer), HDMI in and out, optical, and an Ethernet port for servicing only.

If you’ve got an HDMI ARC cable and a TV with an appropriate port, you’ll want to connect that way. If not, use optical instead — just make sure you take off the plastic caps before plugging anything in.

Once you’ve plugged the soundbar into a power outlet, allow it to fully power on before doing the same with the wireless subwoofer. That way, they’ll automatically pair.

Features and design

The curvy SJ9 is gorgeous, dressed in dark, silvery gray, with speaker grating that wraps around the front, as well as circular grates on top at either end. It features a scrolling digital readout across the front and some dedicated onboard control buttons (located on the front, near the left side) — though you’ll likely be using the remote instead.

The remote itself has all the basic controls you’d expect, plus a few unique ones. There’s automatic power and volume control, buttons to adjust bass and treble balance, and even a cool “night mode” function that compresses louder sounds when you don’t want to wake up the kids.

Software setup

Once everything is properly hooked up, head into your TV’s audio settings and make sure “audio out” is set to Optical/HDMI ARC, not “internal speakers” (and don’t select PCM in this instance).

If you have a newer LG television, you can select “LG Sound Sync/Bluetooth” to pair wirelessly, or “LG Sound Sync/Optical,” which will allow you to control the soundbar’s volume with your TV remote. Still, though, HDMI ARC should be your first choice. It just sounds better.

To connect with Wi-Fi, download the Music Flow mobile app (for iOS or Android), hit “Connect product,” and select the soundbar icon. It will walk you through the process to connect your SJ9 to Wi-Fi, after which it might prompt you to download an update — which you should do. After that, you should be good to go.

Caleb Denison
Caleb Denison is a sought-after writer, speaker, and television correspondent with unmatched expertise in AV and…
How to pre-order Apple’s new iPhone Duo, iPhone 18 Pro, Apple Watch Series 12, Watch Ultra 4, and AirPods 5
Apple's latest lineup is finally official. If you're interested in one of the new devices, here's how you can pre-order them to get your new iPhone, Apple Watch, or AirPods as soon as they launch.
Apple Fall 2026 devices featured 2

Apple has refreshed its hardware portfolio with its most ambitious lineup yet. Headlining the company's September 9 event is its first-ever foldable, the iPhone Duo, and it's joined by the iPhone 18 Pro series, Apple Watch Series 12, Apple Watch Ultra 4, and the AirPods 5. Pre-orders for all devices, except the iPhone Duo, begin September 12, with general in-store and online availability starting September 18. The iPhone Duo will be available for pre-order starting October 16, with retail availability set to begin October 23.

Apple will handle pre-orders through its official website and the Apple Store app. The devices will also be available for pre-order through major US carriers and authorized retailers. Here's a breakdown of available configurations, colors, and where to secure your pre-order.

Read more
Apple just launched a whole bunch of new devices. Here’s how much they all cost
From the $1,999 iPhone Duo to the updated iPhone 18 Pro lineup, Watch Series 12, Watch Ultra 4, and AirPods 5, here is the complete pricing and availability breakdown for every new release.
Apple fall 2026 devices featured

Between the long-awaited arrival of Apple's first foldable and steady price shifts across its Pro lineup, today's hardware updates come with plenty of fine print. With the announcements spanning smartphones, wearables, and audio gear, keeping track of retail prices, storage tiers, and pre-order dates can get overwhelming quickly.

To make things easier, here is what every single device from today's keynote will cost you.

Read more
AirPods 5 vs AirPods 4: Is there anything worth upgrading?
What has actually changed? It's an easy pick if you yearn for noise-cancellation, desire a wireless charing case with Find My, and volume controls on the stem.
AirPods 5

Apple has unveiled the AirPods 5, its latest open-ear wireless earbuds, with upgrades focused on active noise cancellation (ANC), audio performance, controls, and battery life. Building on the AirPods 4, the new model is designed to address some of the limitations of Apple’s tip-less design while retaining the familiar fit. Apple also launched its iPhone 18 Pro series and its first-ever foldable - the iPhone Duo and priced it at a worrying (for Samsung) price of USD 1,999.

But if you already own AirPods 4, the more interesting question is whether these changes are enough to make an upgrade worthwhile. Personally, I think the answer is more complicated than simply saying the newer model is better.

Read more