A Uni-Q experience
At the heart of LSX’s audio prowess is the new 4” Uni-Q driver array. This is a signature KEF technology continuously developed since 1988. Through precise positioning of the drivers, all frequencies emanate from the same point in space. This is called a point source, working in a similar way to the human voice.
A Uni-Q experience At the heart of LSX’s audio prowess is the new 4” Uni-Q driver array. This is a signature KEF technology continuously developed since 1988. Through precise positioning of the drivers, all frequencies emanate from the same point in space. This is called a point source, working in a similar way to the human voice. The effect is an amazing spread of sound - no tiny ‘HiFi sweet spot.’ Coupled with an extremely natural response, neither adding nor removing from the original recording, the soul of the music is fully realised by everybody in the room.
Alongside refinements throughout, the main addition is the ribbing of the midrange driver. This strengthens the cone, reducing distortion, leaving behind a purer, more natural sound. The effect is an amazing spread of sound - no tiny ‘HiFi sweet spot.’ Coupled with an extremely natural response, neither adding nor removing from the original recording, the soul of the music is fully realised by everybody in the room. Alongside refinements throughout, the main addition is the ribbing of the midrange driver. This strengthens the cone, reducing distortion, leaving behind a purer, more natural sound.
Setting the stage
Even the cabinet is packed with acoustic benefits:
• The curved front baffle reduces the diffraction effect, meaning any extra sound scattering into the room is drastically reduced.
• The FEA designed cabinet and bracing, alongside constrained layer damping (CLD) reduces resonance of the cabinet
• An FEA designed flared bass port also reduces the ‘chuffing’ effect at higher volumes.
• An almost invisible, yet ingenious heatsink design keeps the system cool, maximising electronic and driver performance.
• All of this contributes by not contributing. Rather, it lets the Uni-Q driver be the sole performer, providing a clear, natural and accurate sound.
Just add source
LSX follows this tradition. The even smaller boxes contain four amplifiers, one for each driver, totaling 100w per speaker, whilst the streaming preamplifier provides a wide range of potential sources, both wired and wireless.
LS50 Wireless was the ‘biggest small system’ available. Not simply a pair of speakers, it was a total solution, bringing exceptional sound quality in an easy to install package.
A passive speaker is an imperfect system full of compromise. When music is sent to different drivers, the process can cause phase issues, otherwise known as ‘time smearing.’ This makes music sound disorganised.
KEF’s unique Music Integrity Engine™, combined with the point source technology of Uni-Q, ensures that sound not only comes from a single point in space, but all at the correct time. The result is a tighter sound, with a beat that can be followed and a soundstage where you can almost point to where the sound is coming from.
True stereo sound is unleashed
In order to enjoy high resolution music on LS50 Wireless without the issue of dropout or latency, an Ethernet cable was employed. Now for LSX, a proprietary wireless technology has been developed, allowing you to cut the cord, supporting 48kHz/24bit audio wirelessly between the speakers (higher resolution files are downsampled). (The option to use a cable between the speakers is still there, allowing for playback of up to 96kHz/24bit.)
Wirelessly access all the music in the world through Spotify® Connect, Tidal ® or access a music library stored on a NAS drive via DLNA ® and uPNP, or Bluetooth with Qualcomm® aptX™. Apple® AirPlay ® 2 will extend LSX to become part of a multi-room wireless music system, easily controlled from iOS devices.
As TV sets became thinner, their sound quality decreased. Vastly improve your TV experience with LSX’s optical input, or connect your games console or other equipped source.
Friends want to plug in their phone? No problem. At the forefront of the vinyl revival? Add a phono stage to your turntable and connect to LSX. They aren’t fussy about the age of technology used.
Whilst LSX already provides impressive bass output, some people want to get even lower. An RCA output allows easy connection to the award winning Kube range of subwoofers, available in three different sizes to cater for different rooms and personal taste.
Personal assistant devices deserve to have a great voice. Using one of the audio inputs, you can play your Google Chromecast Audio, Amazon Echo Dot or other compatible device. The USB ‘charge out’ output provides the power. You just need to provide the music.
A reworked control system via two new apps - KEF Control and KEF Stream - makes using LSX a breeze. Intuitive layouts and easy to follow inapp guides will make you a master in minutes.Use Control to setup the speaker, apply sound settings, turn on/off LSX and switch sources. A front mounted LED provides instant source notification and feedback to the listener. Future firmware updates can be carried out ‘over-the-air’ through the app (with LSX connected with the inter-speaker cable).
For the speaker sound settings, particular attention has been paid to reduce the threshold of Hi-Fi knowledge required so that anybody can quickly and easily tailor the sound how they like it. The optional Stream app gives you access to your locally or network stored music, as well as Tidal (with a valid Hi-Fi tier subscription), playing up to 96kHz/24bit high resolution audio.
Two-way 2.0 audiophile active digital speaker with 4.5" Uni-Q driver.
Acoustically optimised cabinet with constrained layer damping.
KEF's unique Music Integrity Engine™ time and phase correcting DSP algorithm
Four amplifier active system (2 x 30W + 2 x 70W Class D)
Customisable EQ settings (via KEF Control app)
Apple AirPlay 2
Bluetooth® 4.2 with Qualcomm aptX™
Digital input (TOSLINK)
3.5mm auxiliary input
Dedicated apps for iOS and Android