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KEF

The Ultimate Wireless HiFi Speakers

LS50 Wireless II is more than a high-performance loudspeaker; it’s the perfect all-in-one speaker system. It reveals every detail of your favourite music, which you stream from any source thanks to wireless compatibility with AirPlay 2, Chromecast and more.

SPECIFICATIONS
Drive Units

Uni-Q Driver Array:
LF: 130 mm (5.25 in.) aluminium cone
HF: 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption Technology

Frequency Range (-6db)

40 Hz – 47 kHz
*Depends on EQ settings

Frequency Response (±3dB)

45 Hz – 28 kHz
*Depends on EQ settings

Amplifier Output Power (Per Speaker)

LF: 280W
HF: 100W

Amplifier Class (Per Speaker)

LF: Class D
HF: Class AB

Max SPL Measured at 1m

108 dB

Wireless Streaming Features

AirPlay 2
Google Chromecast
ROON Ready
UPnP Compatible
Bluetooth 5.0
Plays with Audirvāna

Source Relation

Network up to 384kHz/24bit
Optical up to 96kHz/24bit
Coaxial up to 192kHz/24bit
HDMI up to 192kHz/24bit

*Depends on source resolution

Interspeaker Connection

Wireless: all sources resampled to 96kHz/24bit PCM

Wired: all sources resampled to 192kHz/24bit PCM

Supported Format (All Inputs)

MP3, M4A, AAC, FLAC, WAV, AIFF, ALAC, WMA, LPCM and Ogg Vorbis

Home Automation System

Elan, RTi, Crestron Home, Savant, Control4, URC

Supported Format (Network)

MQA
DSF: DSD64, DSD128
DFF: DSD64

Power Input

100 – 240VAC 50/60Hz

Power Consumption200W (operating power)
<2.0W (standby power)
Streaming Services

Spotify via Spotify Connect
Tidal via Tidal Connect
Amazon Music
Qobuz
Deezer
QQ Music via QPlay (coming soon)
Internet Radio
Podcast

*Depends on services availability in different countries

Primary Speaker Inputs

HDMI eARC
TOSLINK Optical
Digital Coaxial
Analog 3.5mm Auxiliary
USB Type A (service)
RJ45 Ethernet (network)
RJ45 Ethernet (interspeaker)

Output

RCA Subwoofer output

Wi-Fi Network Frequency Band

Dual-band 2.4 GHz / 5 GHz

Secondary Speaker Inputs

USB Type A (service)
RJ45 Ethernet (interspeaker)

Output

RCA Subwoofer output

IN THE BOX

LS50 Wireless II

Remote control

Interspeaker Cable

Power cord

Quick Start Guide, Warranty

*Contents and colour vary by region

DIMENSIONS
Dimension (H x W x D) with Rear Panel and Feet*

305 x 200 x 311 mm (12 x 7.9 x 12.2 in.)

* Measurement per unit

WHAT HI-FI? AWARDS 2021 -  'PRODUCT OF THE YEAR'

“These sequels are among the most thrilling speaker systems we’ve heard.” - October 2021, What Hi-Fi?

FULL REVIEW

Pristine sound, intuitive usability

The LS50 Wireless II is not just an enhancement, but rather an innovative evolution from the first-generation of LS50 speakers. With the original LS50 Wireless, KEF set the bar high for high-performance wireless speakers. Now, after three years of intensive research, the LS50 Wireless II raises that benchmark even further with state-of-the-art Metamaterial Absorption Technology to deliver pristine sound, intuitive usability and high-performance wireless capability.

Metamaterial Absorption Technology

A truly revolutionary tool in the KEF acoustic armoury, Metamaterial Absorption Technology (MAT™) is a highly complex maze-like structure that absorbs 99% of the unwanted sound from the rear of the driver, eliminating the resulting distortion and providing purer, more natural sound.

Every spot is the sweet spot with 12th generation Uni-Q with MAT™

LS50 Wireless II melts away, leaving you to enjoy the music. Revolutionary Metamaterial Absorption Technology eliminates distortion for a purer, more natural sound, while our 12th generation Uni-Q with MAT driver array delivers three-dimensional, wonderfully revealing sound anywhere in the room.

Music Integrity Engine

All aspects of the LS50 Wireless II's performance is aided by KEF's bespoke Music Integrity Engine. This collection of bespoke Digital Signal Processing algorithms is optimised for the Uni-Q driver, enabling it to deliver a perfectly timed performance, for better imaging and tighter sound.

Plentiful power

The built in amplifiers have been developed in-house by KEF. Each tweeter is driven by a 100W class A/B amplifier that delivers a smooth, incredible detailed treble performance. Dedicated 280W class D amplifiers power the mid/bass drivers, for room-filling, controlled sound up to 108dB.

Attention to every detail

Every aspect of LS50 Wireless II has been considered for acoustic benefits and from a design perspective. The low-diffraction, curved baffle is precision modelled around the Uni-Q driver, while eye-catching heat sinks and colour-matched ports are located on the well-equipped rear. The top-mounted control panel is designed to be stylish and functional.

DRIVER UNIT

12th Gen 5.25” Uni-Q with MAT

11th Gen 4.5” Uni-Q

BUILT-IN AMPLIFIER POWER (PER SYSTEM)

760W

200W

OPTIMAL ROOM SIZE

10-200 m2

5-40 m2