Compare Samsung HW-Q990D Soundbar vs KEF LSX II Wireless HiFi Speakers

Reviewers liked the broad finish selection, from fabric and satin options to bolder colors, though LT models sacrifice some luxury finishes.

SpaceFit/room calibration is widely present and sometimes useful, though a few reviewers found its effect subtle or hard to hear.

AirPlay support is consistently listed among the wireless streaming options.

AirPlay support is repeatedly listed as part of the LSX II wireless streaming suite.

Reviewers cite the system's high total amplification, supporting its large-room home-theater ambitions.

The built-in active amplification is consistently treated as a strength, with 200W total power or separate amp channels noted across reviews.

SmartThings is generally described as easier than the remote and useful for setup and sound adjustments.

Most app comments are positive, especially setup and responsiveness, but one review cites slow Chromecast response and another notes missing multi-room sync.

Format support is a clear strength, with Dolby Atmos, DTS:X and other surround formats repeatedly confirmed.

High-resolution format support is strong, with reviews citing PCM up to 24-bit/384kHz plus DSD and MQA support depending on model.

Legacy and non-Samsung compatibility is supported mainly through HDMI, optical, and use with non-Samsung TVs, though Samsung TVs unlock extras.

Bluetooth works for streaming, but reviewers focus more on support than detailed stability testing.

Bluetooth range evidence is limited and mixed, with one review wishing for Bluetooth 5.0 mainly for extra range while noting Wi-Fi makes range less critical.

The cabinet and physical construction are described as solid, metal-heavy, durable, and premium.

Build evidence is positive where reviewed, with rigid construction, durable materials and well-made cabinets noted by several sources.

Chromecast support is broadly cited, but one reviewer notes it is not supported in the US.

Chromecast support is widely confirmed, although one LT review reports slow track loading through Chromecast.

The system is repeatedly praised for cohesive handoffs between bar, surrounds, and subwoofer.

Reviewers describe the presentation as coherent, organized and balanced, especially in near-field or small-room use.

The top-panel buttons are basic but clicky and preferred over touch-sensitive controls.

The design is understated and sleek, though large and visually similar to prior models.

Design is a major strength, with reviewers calling the speakers stylish, elegant, compact and visually premium.

Build quality is considered premium and sturdy, with a few size-related caveats.

Detail retrieval is strong, with reviewers hearing fine effects, instrument separation, and crisp textures.

Detail retrieval is consistently strong, with reviewers hearing clear separation, transparent presentation and fine instrumental texture.

Dialogue clarity is a consistent highlight across movies, TV, and sports.

For TV and movies, reviewers generally report crisp dialogue and clearer voices, though home-theater scale still depends on use case.

High-volume behavior is mostly clean, but a few reviews mention subwoofer crackle, chuffing, or muddy bass.

High-volume behavior is mixed: some reviewers hear no distortion, while others note brittle, harsh or strained treble when pushed.

Dolby Atmos is the strongest consensus feature, with convincing height, overhead effects, and immersive placement.

Dynamic range and cinematic impact are strong, especially with action scenes and big effects.

Dynamic performance is praised for punch, rhythm and clean leading edges, though deep bass and extreme output remain limited by size.

EQ, tone, woofer, channel-level, voice, bass, and sound-mode controls give broad customization.

The KEF app offers meaningful EQ and placement adjustments, including Normal and Expert modes and subwoofer tuning.

Most reviewers describe a balanced, clear sound, though some note bass-heavy or muddy moments.

Tonal balance is widely praised as accurate and controlled, but several reviewers note brightness, bass limits or EQ sensitivity.

HDMI passthrough is a major upgrade, especially for 4K/120Hz gaming and consoles.

Google-related support appears through Google Home, Google Assistant, or Chromecast, with regional caveats.

Google-related support appears through Chromecast compatibility across multiple reviews.

HDMI 2.1 gaming is a standout addition, adding 4K/120Hz, VRR, ALLM, and low-latency use cases.

Gaming over HDMI is limited by the product’s ARC-only implementation rather than newer eARC or immersive-format support.

HDMI ARC/eARC support is consistently confirmed as the preferred wired TV connection.

HDMI ARC is a repeated strength for TV use, with reviewers valuing simple TV connection and remote-volume convenience.

Home-theater integration is strong, especially with Samsung TVs via Q-Symphony and menu integration.

The LSX II works well as a compact TV or 2.0 home-theater system, but reviewers repeatedly caution that surround immersion and deep bass are limited.

Most reviewers report easy or reliable inter-speaker connectivity, though one user found a defective HDMI input.

Inter-speaker connectivity is model-dependent: standard LSX II can use wired or wireless links, while LT versions require a cable.

Latency is generally controlled, with reviewers reporting low input lag or synced audio/video.

TV latency is generally strong, with reviewers reporting no sync issues or virtually no lag.

Maximum volume and room-filling power are strong enough for large or open spaces.

Maximum volume is impressive for the size in desktops and small to mid-size rooms, but very loud living-room bass is a limitation.

Low-volume tools like Night Mode, Private Listening, and voice emphasis help late-night or quieter listening.

Low-volume evidence is limited but mixed, with one reviewer saying dynamics drop too low and another still feeling bass at lower levels.

Microphones support SpaceFit, voice features, and mic-off controls, though they are not a major review focus.

The sub and rear speakers usually pair automatically and reliably.

Multi-speaker or multi-room evidence is mixed, with some KEF multi-room control support but no synchronized multi-room playback in the app.

Reviewers describe room-filling, all-around sound that creates a dome or surround bubble.

Uni-Q dispersion earns strong praise for reducing the sweet-spot problem and preserving stereo image off axis.

On-device controls are present and useful when the remote is unavailable.

On-device controls are a weakness because reviewers repeatedly note the absence of speaker touch controls or controls on the cabinets.

Optical/Toslink input is consistently available, though usually secondary to HDMI eARC.

Optical input support is repeatedly listed among the wired connection options.

Price impressions are mixed but favorable overall: reviewers call it high, yet often reasonable given the included amps, streaming and sound.

Privacy discussion centers on the microphone mute control and mic-off indicator rather than broader data practices.

Rear-speaker power cables are usable and sometimes praised, but some reviewers still wanted longer cables.

The remote is usable, but the tiny display and limited shortcuts make deeper adjustments less convenient.

Remote usability is mixed, from useful and ergonomic to cheap-feeling, plasticky, or lacking source controls.

Setup is consistently described as simple, intuitive, or nearly effortless for a multi-piece system.

Setup simplicity is a clear strength, with multiple reviewers calling the process smooth, quick or plug-and-play.

Smart assistant integration is strong, with Alexa repeatedly cited and some reviews also mentioning Google Assistant or Bixby.

Smart features are extensive, including SmartThings, Q-Symphony, wireless Atmos, Tap Sound, and smart-home functions.

Smart features are broad, especially streaming services, app control, Roon support on standard LSX II, and flexible source handling.

Soundstage height is usually impressive, though one reviewer wanted more overhead sensation.

Soundstage height and depth are praised in near-field use, with reviewers hearing images above, behind and layered between speakers.

Spotify Connect is supported, but one reviewer reports a frustrating volume-step issue.

Spotify Connect support is repeatedly confirmed as part of the streaming feature set.

Status indicators are a recurring weakness because the front display is small and hard to read.

Status feedback is handled by LED or light-ring indicators rather than elaborate lighting.

Stereo imaging is better than many soundbars, especially with modes that widen or repurpose rear speakers.

Stereo imaging is one of the most consistent strengths, with reviewers praising placement, layering, precision and wide soundstage behavior.

The subwoofer is generally powerful, controlled, and well integrated, with a few bass caveats.

Subwoofer integration is strong, with outputs and app crossover settings available, and several reviewers recommending a sub for deeper bass or movies.

Surround performance is a major strength, with convincing side, rear, and front-to-back movement.

Surround simulation is weak because reviewers explicitly note that these stereo speakers do not provide immersive surround formats.

Value is context-dependent: reviewers like the complete package, but cheaper Q990C deals undercut it.

Value is viewed positively when considering the all-in-one design, sound quality, and cheaper LT alternative, even when the initial price is high.

Video passthrough is strong, including 4K/120Hz gaming and HDR format passthrough.

Voice clarity is strong, helped by center-channel strength and optional voice enhancement.

Voice and vocal clarity are generally strong, with centered vocals and dialogue-forward presentation, though one comparison notes weaker intelligibility than a rival.

The system is large and heavy enough to require planning, even though that heft supports a premium impression.

The compact footprint and modest weight make placement and room-to-room movement easier than traditional systems.

Wi-Fi and wireless TV connections work well for some reviewers, but HDMI remains the safer recommendation.

Wi-Fi streaming is generally reliable in reviewer use, with one review noting no network problems and another calling wireless performance good.

Wired inputs are strong, centered on HDMI/eARC with optical as a backup.

Wired input support is extensive across reviews, including HDMI ARC, optical, USB-C, analog aux on standard LSX II, Ethernet and subwoofer output.