Product highlights

bi-amped design with separate woofer and tweeter amplifiers for greater headroom and lower distortion 

Uni-Q Driver Array technology makes your entire room sound like the "sweet spot" 

innovative Metamaterial Absorption Technology (MAT) absorbs high-frequency vibrations to eliminate distortion 

5-1/4" aluminum cone woofer 

amplifier power: 280 watts (Class D) 

1" vented aluminum dome tweeter 

amplifier power: 100 watts (Class AB) 

connection between left and right speakers: wired (allows 24-bit/192kHz audio) or wireless (allows 24-bit/96kHz audio) 

frequency response: 45-28,000 Hz (±3 dB) 

peak SPL: 108 dB 

MDF enclosure with elegant curved front baffle 

bass-reflex cabinet with patented offset, flexible port for reduced midrange coloration 

Bluetooth 4.2 with aptX® for high-quality audio streaming performance 

built-in dual-band Wi-Fi® for audio streaming from your network 

compatible streaming platforms include Apple AirPlay® 2, Google Chromecast and Roon (firmware update required) 

uPnP for playing music files from your local network 

KEF Connect app offers comprehensive remote control via your Apple® or Android™ device 

compatible with popular music streaming apps, including Spotify (via Spotify Connect), Tidal, Amazon Music, Qobuz, and Deezer 

precise digital signal processing controls allow optimal room integration 

HDMI eARC (accepts signals up to 24-bit/192kHz) for improved sound from a compatible TV 

Toslink optical digital input (24-bit/96kHz) 

coaxial digital input (24-bit/192kHz) 

RJ45 Ethernet port for network connection (24-bit/384kHz) 

analog 3.5mm auxiliary input 

USB Type A input (for service only) 

mono RCA subwoofer output 

supported file formats (all inputs): MP3, M4A, AAC, FLAC, WAV, AIFF, ALAC, WMA, LPCM and Ogg Vorbis 

also supports DSD files up to 12.3 MHz and MQA files via network connection 

7-15/16"W x 12"H x 12-1/4"D 

weight: 44.31 lbs. (both speakers) 

warranty: 2 years 

What's in the box

• 2 Wireless powered speakers 
• Two 6.5' AC power cords 
• 10' Cat-6 interconnect speaker cable 
• Remote control 
• 2 "AAA" batteries 
• Quick Start Guide 
• Important Safety Information 
• Warranty Information 
•  

About this item

Written by Crutchfield's Eric Angevine

A customer favorite gets an upgrade

KEF's original LS50 Wireless speaker system made waves in the audio world and was a huge hit with our customers, offering impressive sonic fidelity in a convenient, self-powered package. The new LS50 Wireless II retains the sleek looks while making some important tweaks for even better performance. For starters, KEF has increased the built-in power, with 280 watts for each woofer and 100 watts for each tweeter. 

Revolutionary sound absorption

This speaker benefits from KEF's new and innovative Metamaterial Absorption Technology (MAT). It's a highly complex, mazelike structure that's tuned to absorb unwanted sound coming from the rear of the tweeter. The resulting sound is clear, purer, and more detailed. 

Wireless music streaming options

These speakers are equipped with built-in dual-band Wi-Fi® and Bluetooth® 4.2 for easy music streaming. The free KEF Connect app offers access to popular music streaming apps, including Spotify® (via Spotify Connect), Tidal, Amazon Music, Qobuz, and Deezer. And internet radio and podcast listening are on tap as well. 

Wired connections

The primary speaker in this pair is equipped with the following high-resolution digital inputs for connecting external components:

• RJ-45 Ethernet port for network connection (accepts signals up to 24-bit/384kHz)
• HDMI eARC (24-bit/192kHz) for improving sound from a compatible TV
• Toslink optical digital input (24-bit/96kHz)
• coaxial digital input (24-bit/192kHz)

There's also an analog 3.5mm auxiliary input and a mono RCA subwoofer output. The speakers can be interconnected via Ethernet cable or wirelessly. (A wired connection allows higher-resolution 24-bit/192kHz playback.)

A room-filling "sweet spot," thanks to Uni-Q technology

KEF's patented Uni-Q technology places each speaker's tweeter in the acoustic center of the bass/midrange cone. That lets the LS50 Wireless II create a detailed, accurate, three-dimensional sound image. In essence, it makes the "sweet spot" — the ideal listening position — much larger. Sit wherever you like! It'll sound fantastic.

Careful cabinet design

The LS50 Wireless II's extremely rigid cabinet uses smooth, curved surfaces that help the sound radiate outward without distortion. It also features a patented offset, flexible port for reduced midrange coloration. As with previous LS50 models, the cabinet uses a grille-less design to show off the cool-looking driver array and super-stylish color options.

Get the most out of your speakers

Proper speaker placement is also crucial to getting the best performance out of the LS50 Wireless IIs. Placing them on a pair of color-coordinated  KEF S2 speaker stands helps eliminate unwanted vibrations and reflections.  Read our article on stereo speaker placement for positioning and setup tips.