LG Sound Suite Adds DTS:X, Google Cast and Dual Subwoofer Support in Major Update

LG has rolled out a significant software update for its modular Sound Suite audio system, adding DTS:X decoding to the H7 soundbar alongside Google Cast streaming, expanded Wi-Fi compatibility and support for dual subwoofer configurations. The update addresses key feature gaps that early adopters identified since the system’s launch, positioning the premium modular platform more competitively against traditional AV receiver setups.

The H7 soundbar, which serves as the central processing hub for Sound Suite’s wireless satellite speakers, previously supported only Dolby Atmos via LG’s proprietary FlexConnect technology. The addition of DTS:X — the rival object-based audio format used extensively on Blu-ray and 4K Ultra HD discs — means owners can now experience immersive soundtracks from physical media and compatible streaming titles without format limitations. DTS:X support arrives via firmware version 3.20.0, which began deploying to North American and European units last week.

Google Cast integration allows direct streaming from thousands of mobile apps — including Spotify, Tidal, YouTube Music and podcast platforms — to the Sound Suite system without requiring a separate Chromecast device or LG’s proprietary app. The implementation supports high-resolution audio up to 24-bit/96kHz, matching the capabilities of Google’s own Cast-enabled speakers.

Network flexibility receives a substantial upgrade with support for 6 GHz Wi-Fi (Wi-Fi 6E) and 5 GHz DFS (Dynamic Frequency Selection) channels. These additions reduce interference in dense apartment environments and allow more stable multi-speaker synchronization across larger homes. The 6 GHz band, newly opened for unlicensed use in 2020, offers wider channels and lower latency — critical for maintaining phase coherence across wireless satellite speakers positioned around a room.

For bass enthusiasts, the system now supports pairing two W7 wireless subwoofers simultaneously. Each W7 houses a 10-inch driver with 220 watts of Class D amplification; dual configurations effectively double displacement and output headroom while enabling smoother in-room bass response through strategic placement. The H7 soundbar manages crossover and delay alignment automatically via its built-in room calibration routine.

LG also previewed a “Media Connect Hub” currently in development, described as a bridge for DTS:X content from external source devices. While specifications remain undisclosed, industry observers expect an HDMI eARC-equipped breakout box that would allow Blu-ray players, game consoles and media streamers to pass DTS:X bitstreams directly to the H7 for decoding — bypassing the TV’s audio processing, which often strips advanced formats. Such a device would solve a common pain point: many modern TVs refuse to pass DTS:X over eARC, downgrading to stereo or Dolby Digital instead.

Sound Suite launched in mid-2023 as a “build-your-own” alternative to traditional soundbar-and-sub bundles. The H7 soundbar retails for $999, with W7 subwoofers at $799 each and S75TR rear speakers at $499 per pair. A full 5.1.2 configuration approaches $3,100 — competitive with mid-range AV receiver packages but without speaker wires. The system’s FlexConnect technology uses the H7’s microphones to measure each speaker’s acoustic contribution and apply per-channel EQ, delay and level adjustments automatically.

Firmware 3.20.0 is available now through the LG Sound Suite app and via automatic updates for connected units. Regional rollout timing varies; LG’s Korean and Japanese divisions typically receive updates first, followed by North America and Europe within two to four weeks. Owners can force-check for updates in the app’s System Settings menu.