LG SC9S.DUSAJLM
Score: 87/100
Sonos ARCG2US1BLK
Score: 85/100Rankings
The LG SC9S is a premium 3.1.3-channel soundbar designed for LG OLED C-series TVs, offering 400 W of power, Dolby Atmos with up-firing drivers, and a rich set of streaming options. Its AI Room Calibration and seamless TV synergy provide a high-end home-theater experience, though the system is heavy and lacks some high-resolution audio support.
The Sonos Arc Ultra is a premium 9.1.4-channel Dolby Atmos soundbar delivering deep bass, clear dialogue, and a spacious 3-D soundstage, tightly integrated with the Sonos ecosystem. Its modern Wi-Fi 6 and Bluetooth 5.3 connectivity are strong, but the lack of HDMI inputs and DTS:X support limit flexibility.
| Attribute | | |
|---|---|---|
400 Wbest | — | |
3.1 | 9best | |
| ↓ lower better | 22.7 kg | 5.761 kgbest |
12 monthsbest | 12 monthsbest | |
| ↓ lower better | 0.5 Wbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Audio Performance(3) | ||
Audio Channels | 3.1 | 9 |
Supported Audio Formats | Dolby Atmos, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, DTS:X, DTS-HD Master Audio, DTS-HD High Resolution, DTS Digital Surround, IMAX Enhanced | Dolby: Stereo PCM, Dolby Digital, Dolby Digital Plus, Dolby Atmos, Dolby TrueHD, Multichannel PCM; DTS: DTS Digital Surround |
Sound Modes | AI Sound Pro, Cinema, Music (Meridian), Game, Sports, Clear Voice, Bass Blast, Bass Blast+, Triple Level Spatial Sound, Smart Up-Mixer | Speech Enhancement, Night Sound, Trueplay, Adjustable EQ |
Build & Design(1) | ||
Soundbar Weight (kg) | 22.7 kg | 5.761 kg |
Power & Battery(1) | ||
Power Source | AC | AC mains |
Connectivity(2) | ||
Bluetooth Version | 5.0 | 5.3 |
Optical Input | true | false |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the SC9S as a top-tier soundbar for LG OLED owners, highlighting its sleek integration via the Synergy Bracket, immersive Atmos performance, and robust HDMI 2.1 feature set. They also commend the AI Room Calibration and Meridian-tuned music mode, while noting the lack of 24bit/192kHz support and that its measured loudness, though strong, isn't the absolute best in its class.
Everyday users love how the SC9S blends seamlessly with C-series OLEDs, delivering powerful bass and a clean, minimalist look. Praise focuses on easy setup, strong Atmos effect, and single remote, while complaints center on missing rear speakers, a non-backlit remote, incompatibility with G-series TVs, and occasional Bluetooth hiccups.
Professional reviewers praise the Arc Ultra as a top-tier all-in-one Dolby Atmos soundbar, highlighting its powerful bass, clear dialogue, and immersive soundstage, while noting the missing HDMI inputs and DTS:X support as drawbacks.
Everyday users love the deep bass, crystal-clear dialogue, and seamless Sonos integration, but complain about the absence of HDMI inputs, occasional app crashes, and the need for a separate optical adapter.
“Perfect match with my C3 TV”
“Incredible sound quality and deep bass”
“Bass is shockingly deep for a soundbar-no subwoofer needed for most content.”
