KEF LS50 Wireless II Active Speaker System

Technical Specifications

	Primary speaker	Secondary speaker
Inputs	HDMI eARC TOSLINK Optical Digital Coaxial Analog 3.5mm Auxiliary USB Type A (service) RJ45 Ethernet (network) RJ45 Ethernet (interspeaker)	USB Type A (service) RJ45 Ethernet (interspeaker)
Output	RCA Subwoofer output	RCA Subwoofer output
Wi-Fi network standard	IEEE 802.11a/b/g/n/ac IPv4, IPv6
Wi-Fi network frequency band	Dual-band 2.4 GHz / 5 GHz

Model	LS50 Wireless II
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) measured at 85dB/1m	40Hz – 47kHz *Depends on EQ settings
Frequency response (±3dB) measured at 85dB/1m	45Hz – 28kHz *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 4.2
Streaming services	Spotify via Spotify Connect, Tidal, Amazon Music, Qobuz, Deezer, QQ Music via QPlay, Internet Radio, Podcast *Depends on services availability in different countries
Source resolution	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
Supported format (network)	MQA: MQA Core Decoder DSF: DSD64, DSD128, DSD256 DFF: DSD64
Dimensions (HWD per speaker)	305 x 200 x 311 mm
Weight (per set)	20.1kg
Power input	100 – 240VAC 50/60Hz
Power consumption	200W (operating power) <2.0W (standby power)

DESIGN	Uni-Core Force Cancellation
DRIVE UNITS	2 x 6.5” drivers
FREQUENCY RESPONSE (±3DB)	11Hz – 200Hz
MAX OUTPUT	105dB
AMPLIFIER TYPE	Built-in Class D
AMPLIFIER POWER	1000W RMS (2 x 500W RMS)
VARIABLE LOW PASS FILTER	40Hz – 140Hz, LFE
INPUT	RCA phono sockets Speaker level inputs
LINE OUTPUT	RCA phono sockets
LINE OUTPUT HIGH PASS FILTER	40Hz – 120Hz, Bypass
POWER REQUIREMENTS	100 - 240V, 50/60 Hz
POWER CONSUMPTION	1000W
DIMENSION (H x W x D) WITH REAR PANEL AND FEET	246 x 256 x 248 mm (9.68 x 10.07 x 9.76 in)
WEIGHT	14kg (30.9Ibs)
COLOUR	Carbon Black Mineral White

Dimensions

657 x 226 x 308 mm (25.9 x 8.9 x 12.1 in.)

Unit Measurement

Pair

Weight

4.85kg (10.7Ib) per stand

Colour

Carbon Black
Titanium Grey
Mineral White
Royal Blue Special Edition
Crimson Red Special Edition