KEF · LSX · Bookshelf
LSX IIII
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Product description
Compact active bookshelf pair built around the Uni-Q coaxial driver array and a Music Integrity Engine DSP. 100 W per cabinet plus full network streaming (AirPlay 2, Chromecast, Roon, Spotify/Tidal Connect, Bluetooth 5.0) make it a desk-friendly all-in-one — speakers connect to each other either over the supplied cable or wirelessly via KEF's W2 link.
| Type | Bookshelf |
|---|---|
| Power | Active |
| Height | 240 mm |
| Width | 155 mm |
| Depth | 180 mm |
| Weight | 3.6 kg |
| Enclosure | — |
| Drivers | 1× 19 mm tweeter (aluminium dome), 1× 115 mm mid-bass (magnesium-aluminium alloy cone) |
| Frequency response | 54–28000 Hz (±3 dB) |
| Amplification (per driver) | tweeter 30 W (class D) · mid-bass 70 W (class D) |
| Total amp power | 200 W |
| Max SPL @ 1 m | 102 dB |
| Hi-res audio | 24 bit / 384 kHz |
| Wired inputs | HDMI ARC, Optical (Toslink), USB Audio, RCA, Ethernet |
| Streaming / wireless | AirPlay 2, Google Cast, Bluetooth, Roon Ready, Spotify Connect, Tidal Connect, Wi-Fi |
| Outputs | RCA sub-out |
| Room correction | — |
| Primary + secondary pair | Yes |
| Wireless inter-speaker link | Yes |
| Latency | — |
| Idle power | — |
| Max consumption | — |
| Manufacturer | international.kef.com ↗ |
| Product page | Open product page ↗ |