LG S70TY: problems, parts and running costs

Checked: 2026-10-29

Summary

The main reported weaknesses are a single up-firing height channel that limits spatial precision, flat dialogue in some modes (worst in Cinema mode) and inconsistent DTS:X support across LG’s regional pages. There are no consumables or subscriptions, and the only documented expansion is LG’s optional SPT8-S rear speakers at $199.99. Value is strong around $240-270, fair near $300, and weak at full MSRP.

Common problems and fixes

Dialogue can sound flat — What Hi-Fi found flat, nuance-lacking dialogue in Macbeth even in Clear Voice Pro; try Clear Voice mode instead of Cinema. Not a defect covered by warranty. [7]
Cinema mode hurts dialogue clarity — What Hi-Fi says Cinema mode undermines vocal clarity while Clear Voice Pro helps. Switch sound modes per content. [7]
DTS:X support is inconsistent — LG’s US page lists DTS:X “No” and the owner’s manual omits it, while LG’s Singapore page and What Hi-Fi say DTS:X is supported; verify the regional SKU and firmware before buying. [1][2][3][7]
No Wi-Fi and no on-screen display — no AirPlay 2, Google Cast, Spotify Connect or Tidal Connect, and setup runs through LEDs, voice prompts and the app; PCMag calls the navigation pad an odd control without a screen. [6][7]
Subwoofer finish looks cheap and untidy — PCMag and What Hi-Fi describe the subwoofer’s rear finish as untidy and cheap-looking. Cosmetic, not a functional defect. [6][7]
Subwoofer not producing sound — LG’s troubleshooting lists a subwoofer LED blinking green/red as a pairing symptom; re-pair via the pairing button until the LED turns solid green. [5]

Parts and consumables

SPT8-S wireless rear speakers (sold separately) — $199.99 (PCMag); expands the system from 3.1.1 to 5.1.1. [6]
No user-replaceable parts or consumables — no serviceable parts list was found; warranty is 1 year parts and labor. [1][8]

Yearly running cost

Not enough data: LG does not publish power consumption (the manual defers to the main label), and no filters, pods or subscriptions are reported. Electricity cost cannot be computed from the sources. [3]

When it is a good buy

Price thresholds from the sources: around $240-270 is strong value (one of the few Atmos height-channel soundbars with a real subwoofer, HDMI eARC and 4K/120 gaming passthrough, plus PCMag’s Editors’ Choice); around $300 (LG list / typical Best Buy) is fair, especially with an LG TV for WOW Orchestra and TV Sound Mode Share; much above $300-350 is weak, where the single height channel, no Wi-Fi, no on-screen display and the DTS:X caveat matter more. [6][7]

Alternatives: the Sonos Beam Gen 2 ($499) is the class benchmark and beats the S70TY on vocal clarity and emotion; add LG’s SPT8-S rear speakers ($199.99) if true surround matters more than dialogue. [6][7]