Short answer: the Sony HT-S400. Both are rated 3.4/5 for sound quality (#12 and #9 of 16 soundbars with a subwoofer), and the Sony HT-S400 costs $258 against $269.99 for the LG S70TY, and with sound quality even, the cheaper one is the better buy.
Why pick the LG S70TY: The bar and wireless sub blend smoothly, giving a balanced sound with controlled bass that What Hi-Fi rated four stars. Watch for: A single up-firing driver gives only a hint of height, so the surround effect is limited without LG’s optional rears.
What the Sony HT-S400 does well: The HT-S400 pairs a slim bar with a wireless subwoofer, so movies get real low end without wires across the room. The tradeoff: It has no Atmos or DTS:X and only HDMI ARC, so lossless and height formats are out.
Buy the Sony HT-S400. Both are rated the same for sound quality, and it costs $11.99 less than the LG S70TY.
Looking for alternatives? See the complete TV Soundbars rankings.
The bar and wireless sub blend smoothly, giving a balanced sound with controlled bass that What Hi-Fi rated four stars.
The HT-S400 pairs a slim bar with a wireless subwoofer, so movies get real low end without wires across the room.
Prices on this page were last checked November 2, 2026 at 11:36 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| LG S70TY | Sony HT-S400 | |
|---|---|---|
| Price | $269.99 | $258.00 |
| Ranked | #9 of 16 in Soundbars With a Subwoofer | #12 of 16 in Soundbars With a Subwoofer |
| Amplifier Power | 400W total | 330W total |
| App | Yes (LG Soundbar) | No |
| Aux Input | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.0 |
| Channels | 3.1.1 | 2.1 |
| DTS:X | Yes | No |
| Dimensions | 2.5”H x 37.4”W x 4.5”D (63 x 950 x 115 mm) | 2.5”H x 35.4”W x 3.5”D (64 x 900 x 88 mm) |
| Dolby Atmos | Yes (up-firing drivers) | No |
| Drivers | 7 drivers across bar and sub, including an up-firing center channel | Bar: 2 X-Balanced speaker units; Sub: 6.3” (160 mm) woofer |
| HDMI Input | 1 | No |
| HDMI eARC | Yes | ARC only |
| Included Subwoofer | Wireless | Wireless, 6.3” driver |
| Optical Input | Yes | Yes |
| Rear Speakers | Optional (LG SPT8-S) | No |
| Room Correction | No | No |
| Subwoofer Dimensions | 377H x 200W x 285D mm | 387H x 192W x 400D mm |
| Subwoofer Weight | 5.7 kg | 7.3 kg |
| Voice Assistants | No | No |
| Weight | 6.6 lbs (3.0 kg) | 5.3 lbs (2.4 kg) |
| Wi-Fi | No | No |
Related Soundbar Comparisons
How LG S70TY compares with other leading options: