Informations
Product description
The LS50 Wireless II is a fully active stereo speaker system combining high-fidelity sound, modern digital connectivity, and built-in amplification. It uses KEF’s Uni-Q coaxial driver array with advanced absorption technology to deliver detailed, balanced, and spacious sound. It integrates DAC, amplifiers, streaming and input options to work standalone without a separate amp — ideal for music listening, desktop setups or full stereo systems with minimal gear.
Key Features
• Uni-Q driver array with coaxial tweeter + mid/bass driver for point-source imaging and coherent sound dispersion
• Metamaterial Absorption Technology (MAT) behind the tweeter for reduced distortion and cleaner treble
• Built-in amplifiers: 280 W Class-D for mid/bass, 100 W Class-A/B for highs — plenty of power and dynamic range
• Support for high-resolution streaming and files (network, digital inputs)
• Multiple input types: network streaming, HDMI eARC, optical, coaxial, analog 3.5 mm, subwoofer output, Ethernet inter-speaker link
• Wireless or wired speaker-to-speaker connection (wireless up to 24-bit/96 kHz, wired up to 24-bit/192 kHz)
• Compact footprint for bookshelf or standmount placement
Specifications
| PRODUCT | KEF LS50 Wireless II Active Speakers (pair) |
| Design | Two-way bass-reflex active stereo speaker system |
| Drive Units | Uni-Q Driver Array — 130 mm (5.25″) aluminium cone mid/bass + 25 mm (1″) vented aluminium dome tweeter (with MAT) |
| Amplifier Output (per speaker) | Mid/Bass: 280 W Class-D, High: 100 W Class-A/B |
| Maximum SPL (1 m) | 108 dB |
| Frequency Response (–6 dB) | 40 Hz – 47 kHz |
| Frequency Response (±3 dB) | 45 Hz – 28 kHz |
| Sensitivity (2.83 V / 1 m) | 85 dB SPL |
| Nominal Impedance | 8 Ω (minimum ~3.2–3.5 Ω) depending on frequency / load |
| Connectivity / Inputs | HDMI eARC, Optical, Coaxial, Analog (3.5 mm), Network (Ethernet/Wi-Fi), Subwoofer RCA output |
| Wireless Features | Wi-Fi streaming, AirPlay 2, Google Chromecast, Roon Ready, UPnP, Bluetooth |
| Supported Audio Formats | PCM up to 24-bit/384 kHz, MQA, DSD256 |
| Speaker-to-Speaker Link | Wireless (24-bit / 96 kHz) or Wired (24-bit / 192 kHz) |
| Dimensions (per speaker H × W × D) | 305 × 200 × 311 mm |
| Weight (per speaker) | ~10 kg (≈ 20.1 kg pair) |
| Power Requirements | 100–240 V AC, 50/60 Hz; Power consumption up to ~200 W (operating) |