LG S40TR 4.1 Review
A low-cost 4.1 package that prioritizes real rear-channel effects over Atmos and smart-audio extras.
At a Glance
The S40TR’s separate rear speakers and subwoofer deliver authentic surround movement at an unusually low price, while its missing center channel and limited immersive-format support keep it simpler than newer 5.1 systems.
LG S40TR 4.1 Specifications
The LG S40TR is a 4.1-channel, 400 W soundbar system with five speakers, a wireless subwoofer, rear speakers, Dolby Digital and DTS Digital Surround, HDMI ARC, optical input, USB and Bluetooth 5.3.
Audio & Channels
| Channel Configuration | 4.1 |
| Speakers | 5 speakers |
| Total Power Output | 400 W total output |
Audio Formats
| Supported Formats | Dolby Digital; DTS Digital Surround; AAC |
Included Components
- Main soundbar
- Wireless subwoofer
- 2 rear speakers
Sound Features
- AI Sound Pro
- Clear Voice Plus
- WOW Orchestra
- WOW Interface
- 3-band EQ
- Standard / Cinema / Game sound modes
Connectivity
| HDMI Inputs | None |
| HDMI eARC/ARC | 1 HDMI ARC output |
| Optical Input | 1 optical input |
| USB | 1 USB port |
Wireless & Streaming
| Bluetooth | Bluetooth 5.3; SBC and AAC codecs |
Controls & Smart Features
| App | LG Soundbar app for iOS and Android |
| Remote | Remote control included; compatible LG TV remote control through WOW Interface |
Dimensions & Weight
| Soundbar Dimensions | 28.3 x 2.5 x 3.4 in (720 x 63 x 87 mm) |
| Soundbar Weight | 3.64 lb (1.65 kg) |
| Subwoofer Dimensions | 6.73 x 12.60 x 9.92 in (171 x 320 x 252 mm) |
| Subwoofer Weight | 9.26 lb (4.2 kg) |
| Rear Speaker Dimensions | 3.94 x 6.95 x 4.72 in (100 x 176.5 x 120 mm) each |
| Rear Speaker Weight | 4.63 lb (2.1 kg) for rear-speaker pair |
Power
| Power Consumption | Main: 22 W operating / ≤0.5 W off; rear speaker unit: 20 W operating / ≤0.5 W off; subwoofer: 35 W operating / ≤0.5 W off |
In the Box
- Rear speakers
- Remote control
- Warranty card
Warranty & Support
| Warranty | 1-year limited warranty for parts and labor |
| Support | 24/7 chat support, phone/email contact, manuals, troubleshooting, repair service and LG Premium Care options |
Summary
The package provides the soundbar, subwoofer and rear-speaker pair as a complete 4.1-channel system. It includes AI Sound Pro, Clear Voice Plus, WOW Orchestra and app control.
Should You Buy the LG S40TR 4.1?
The LG S40TR 4.1 ranks #3 of 10 in our Best Soundbars Under $300 ranking, with a CORE score of 82/100. It is strongest on surround & Atmos immersion and bass performance, where it ranks 3rd of 10 on both.
Buy it if
- You want real rear speakers rather than virtual surround.
- You want strong surround & Atmos immersion: it ranks 3rd of 10 on this measure.
- You want strong bass performance: it ranks 3rd of 10 on this measure.
Skip it if
- Sound & dialogue quality is your top priority. The Sonos Ray scores 91 there, against 78 for the LG S40TR 4.1.
How the LG S40TR 4.1 Scored
CORE scores every model in this category on the factors below, listed from most to least important for soundbars under $300. The rank shows where the LG S40TR 4.1 places among the 10 models in our Best Soundbars Under $300 ranking.
Technical Assessment
Performance
Rear effects arrive from physical speakers behind the listener, creating more obvious front-to-back movement than virtual-surround bars. Bass has dedicated support from the subwoofer, but dialogue relies on the front bar without a discrete center channel and there is no Atmos height layer for overhead effects.
Reliability and Ownership
The retained owner sample is large enough to provide useful sentiment, and no single recurring exact-model hardware issue was strong enough to dominate it. The main ownership considerations are the extra rear-speaker power requirements and the benefits that become more convenient when the system is paired with a compatible LG television.
Pros and Cons
Pros
- Physical rear speakers create genuine back-channel effects
- Wireless subwoofer adds dedicated movie bass
- Low current price makes a multi-speaker layout accessible
Cons
- No Dolby Atmos height layer
- No dedicated center channel for dialogue anchoring
- Feature and music flexibility are narrower outside the LG TV ecosystem
What Reviewers and Owners Say
- Exact-model review highlighted the unusual inclusion of physical rear speakers and subwoofer at a low price, while noting ecosystem dependence for some LG-specific features.
- Hands-on field notes found easy pairing, audible rear-channel effects and centered dialogue, while noting power/placement requirements for the rear speakers.
Owners rate the LG S40TR 4.1 4.4 out of 5 on average, across 120 ratings at a major US retailer.
LG S40TR 4.1 Alternatives
Sonos Ray
Choose it for stronger features & music flexibility: it scores 93 there, against 76 for the LG S40TR 4.1.
VIZIO SV510X-0806 5.1 Soundbar SE
Choose it for stronger sound & dialogue quality: it scores 86 there, against 78 for the LG S40TR 4.1.
Samsung HW-S60D
Choose it for stronger features & music flexibility: it scores 90 there, against 76 for the LG S40TR 4.1.
How We Evaluate
Last updated October 7, 2026.