KEF LSX II Wireless HiFi System - Carbon Black

Drive units (per speaker)
Uni-Q driver array:
HF: 19mm (0.75in.) aluminium dome
LF/MF: 115mm (4.5in.) magnesium/aluminium alloy cone

Frequency range (-6dB) measured at 85dB/1m
49Hz – 47kHz
*Depends on EQ settings

Frequency response (±3dB) measured at 85dB/1m
54Hz – 28kHz  
*Depends on EQ settings

Amplifier output power (per speaker)
LF: 70W  
HF: 30W 

Amplifier class (per speaker)
LF: Class D  
HF: Class D

Max SPL measured at 1m
102 dB 

Wireless streaming features
AirPlay 2
Google Chromecast 
Roon Ready
UPnP Compatible 
Bluetooth 5.0
Plays with Audirvāna

Streaming services
Spotify via Spotify Connect 
Tidal via Tidal Connect 
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 
USB Type C up to 192kHz/24bit
HDMI up to 1.411Mbps PCM
*Depends on source resolution

Interspeaker connection
Wireless:  all sources resampled to 48kHz/24bit PCM 
Wired:  all sources resampled to 96kHz/24bit PCM

Supported format (network)
MQA^, DSD, FLAC, WAV, AIFF, ALAC, AAC, WMA, MP3, M4A, LPCM and Ogg Vorbis

Home Automation System
Elan, RTi, Crestron Home, Savant, Control4

Dimensions (HWD per speaker)
240 × 155 × 180 mm (9.5 × 6.1 × 7.1 in.)

Weight (per set)
7.2kg (15.6lbs)

Power input
100 – 240VAC 50/60Hz

Power consumption
200W (operating power) 


Inputs
Primary speaker
HDMI ARC
TOSLINK Optical
USB Type C
Analog 3.5mm Auxiliary RJ45 Ethernet (network) RJ45 Ethernet (interspeaker)
Secondary speaker
RJ45 Ethernet (interspeaker)

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