KEF LSX II Active Wireless Speaker System
Brand: KEF
The KEF LSX II is a compact active wireless speaker system designed to deliver immersive high-fidelity sound from a space-efficient format. Featuring KEF’s Uni-Q® driver array, Music Integrity Engine, 100W amplification per speaker and extensive streaming support, it connects seamlessly with music services, TVs, laptops and other entertainment devices.
Compact High-Fidelity Sound with Complete Wireless Connectivity
KEF Uni-Q® Driver Array
Music Integrity Engine
Streaming & HDMI ARC
LSX II
KEF LSX II Active Wireless Speaker System
The KEF LSX II combines compact dimensions with advanced acoustic engineering and flexible connectivity for modern music and entertainment systems. Each speaker features a Uni-Q® array with a 115mm magnesium/aluminium alloy cone and 19mm aluminium dome tweeter, powered by dedicated 70W and 30W Class D amplifiers. KEF’s Music Integrity Engine helps optimise performance, while AirPlay 2, Google Cast, Roon Ready, Bluetooth 5.0 and major streaming services provide extensive wireless playback options. HDMI ARC, optical, USB-C, 3.5mm auxiliary and Ethernet connectivity allow easy integration with TVs, computers and other sources.
LSX II
Details & Specifications
Design & Driver Configuration
| Brand | KEF |
|---|---|
| Model | LSX II |
| Product Type | Active Wireless Speaker System |
| Driver Technology | Uni-Q® Driver Array |
| LF / MF Driver | 115mm (4.5 in.) Magnesium / Aluminium Alloy Cone |
| High-Frequency Driver | 19mm (0.75 in.) Aluminium Dome |
| Signal Processing | KEF Music Integrity Engine |
Frequency & Acoustic Performance
| Frequency Response (±3dB) | 54Hz–28kHz |
|---|---|
| Frequency Range (-6dB) | 49Hz–47kHz |
| Measurement Level | 85dB / 1m |
| Maximum SPL at 1m | 102dB |
| Frequency Performance | Depends on EQ Settings |
Amplification
| LF Amplifier Output per Speaker | 70W |
|---|---|
| HF Amplifier Output per Speaker | 30W |
| Total Amplification per Speaker | 100W |
| LF Amplifier Class | Class D |
| HF Amplifier Class | Class D |
Wireless Streaming & Audio Formats
| AirPlay 2 | Yes |
|---|---|
| Google Cast | Yes |
| Roon Ready | Yes |
| UPnP Compatible | Yes |
| Bluetooth | Bluetooth 5.0 |
| Audirvāna | Supported |
| Streaming Services | Spotify Connect, Tidal Connect, Amazon Music, Qobuz, Deezer, QQ Music via QPlay, Internet Radio, Podcast |
| Supported Formats | MQA, DSD, FLAC, WAV, AIFF, ALAC, AAC, WMA, MP3, M4A, LPCM, Ogg Vorbis |
Inputs, Outputs & Resolution
| Network Resolution | Up to 384kHz / 24-bit |
|---|---|
| Optical Resolution | Up to 96kHz / 24-bit |
| USB Type-C Resolution | Up to 192kHz / 24-bit |
| HDMI Resolution | Up to 1.411Mbps PCM |
| Primary Speaker Inputs | HDMI ARC, TOSLINK Optical, USB Type-C, Analog 3.5mm Auxiliary, RJ45 Ethernet Network, RJ45 Ethernet Interspeaker |
| Secondary Speaker Input | RJ45 Ethernet Interspeaker |
| Subwoofer Output | RCA Subwoofer Output |
| Wireless Interspeaker Resolution | 48kHz / 24-bit PCM |
| Wired Interspeaker Resolution | 96kHz / 24-bit PCM |
Dimensions, Network & Power
| Dimensions (H × W × D) | 240 × 155 × 180 mm |
|---|---|
| Dimensions | 9.5 × 6.1 × 7.1 in |
| Weight per Set | 7.2 kg / 15.6 lb |
| Power Input | 100–240VAC, 50/60Hz |
| Operating Power Consumption | 200W |
| Standby Power Consumption | <2.0W |
| Wi-Fi Standard | IEEE 802.11a/b/g/n/ac |
| Network Protocol | IPv4 / IPv6 |
| Wi-Fi Frequency Bands | 2.4GHz / 5GHz Dual-Band |
| Home Automation Support | Elan, RTi, Crestron Home, Savant, Control4 |
About KEF
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