KEF LSX Ii

Drive units (per speaker)
Uni-Q Driver Array:
HF: 19mm (0.75in.) Aluminum Dome
LF/MF: 115mm (4.5 -in.) Magnesium/Aluminum 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 Sple Measured AT 1M
102 dB 
Wireless streaming features
AIRPLAY 2
Google Chromecast 
Roon Ready*
UPNP Compatible 
Bluetooth 4.2
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
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) 
<2.0W (standby 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