Research note: This is an independent, research-based assessment built from official specifications and product documentation. We have not claimed a hands-on laboratory test.
Key specifications
- 7.1.3 channels, 13 speakers and 670 W total quoted output
- Wireless subwoofer and two rear speakers included
- Dolby Atmos, DTS:X and 24-bit/96 kHz audio
- One HDMI input plus eARC with 4K/120, VRR, ALLM and Dolby Vision
- Wi-Fi, Bluetooth, AirPlay 2, Chromecast, Spotify/Tidal and WOW Orchestra
Speaker architecture and surround approach
Five front channels, rear speakers, a subwoofer and three vertical channels create a 7.1.3 layout. Physical rears provide more convincing effects behind the listener than a single virtual-surround bar. Channel labels describe processing and driver roles, not a guarantee that every room will produce discrete cinema-like positions. Ceiling height, side walls, seating distance and source mix strongly influence the result, especially for reflected height effects.
Subwoofer, rear channels and expansion
The necessary subwoofer and rear speakers are in the box, avoiding immediate add-on costs. The 10 kg sub and powered rears require real room and power planning. Buyers should include the cost, power sockets and placement of every optional component when comparing systems. A complete package can deliver more convincing envelopment, while a single bar is simpler and visually cleaner.
Dialogue, calibration and everyday TV
AI Room Calibration Pro corrects response, AI Sound Pro selects processing and Clear Voice Pro supports speech. LG TV Sound Mode Share and WOW Orchestra can coordinate compatible television speakers. These features matter as much as spectacular demo scenes because most viewing contains speech. Calibration improves consistency but cannot fully overcome a highly open room or poor source mix; manual level adjustment may still be useful.
HDMI, formats and gaming
One HDMI input and eARC support 4K/120, VRR, ALLM, HDR10 and Dolby Vision. Atmos and DTS:X are present, but buyers with multiple consoles may need TV-side switching. eARC is the preferred connection for lossless Dolby Atmos from a compatible TV. Passthrough specifications matter only when sources connect through the bar; console owners should confirm 4K/120, VRR and HDR compatibility for their exact signal chain.
Music streaming and ecosystem
Wi-Fi, Bluetooth, AirPlay 2, Chromecast, Spotify Connect and Tidal Connect provide broad music options. WOW Interface and Orchestra are most useful with recent compatible LG TVs. Ecosystem advantages can be substantial, but several branded features require a compatible television or additional speakers. Core HDMI behavior and format support should remain the deciding factors for mixed-brand households.
Installation and long-term value
S90TR retains the complete-package advantage at a lower price than S95TR. It sacrifices channels and total output but may fit ordinary rooms better, especially when bundled with an LG television. Soundbars are room systems rather than isolated gadgets: width, wall mounting, ventilation, cables and wireless-speaker positions deserve planning. A premium model earns its cost when it replaces a more complex receiver system without sacrificing the features the household actually uses.
Who should buy it?
Buy S90TR if you want included rears and a subwoofer, own an LG OLED or need 4K/120 passthrough on one source. It fits buyers who value complete hardware more than the highest channel count.
Alternatives to consider
LG S95TR adds channels and more elaborate rears; Samsung Q990D offers greater channel density and two HDMI inputs. Sonos Arc Ultra is cleaner but expensive once expanded, while Samsung Q930-class models are direct package competitors.
Verdict
LG S90TR is a sensible step-down complete system. Its 7.1.3 hardware, real rears, large subwoofer and modern HDMI support deliver meaningful cinema impact without flagship pricing. One HDMI input and LG-centric extras are the main limitations, not the core audio platform.