KEF LSX User Manual

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Table of ContentsSetting Up the LSXUsing the KEF Control AppPlayback and StreamingFAQ and Troubleshooting
7.5 Over the Air Firmware Update
7.5.1 Automatic Update Alert
1. You will be reminded to update the rmware if a newer version is available. Tap
“Update” to continue.
2. Connect the Master and Slave Speakers with the provided inter-speaker cable through
the “To Master/Slave” connection ports on the back of the speakers and then tap
“Next”. Cable Mode will also be automatically activated (see chapter “Cable Mode”).
3. Wait until the rmware is downloaded and updated.
2. 3.
The entire process may take around 20 minutes. The KEF Control app must
be KEPT IN THE FOREGROUND. DO NOT unplug the power cables,
DO NOT disconnect the inter-speaker cable and DO NOT reset speakers
during the upgrade.

KEF LSX Specifications

General

Frequency Response	54Hz - 28kHz (±3dB)
Frequency Range	49Hz - 47kHz (-6dB)
Max. SPL	102dB
Outputs	Subwoofer Output
Design	2-way bass reflex
Driver	Uni-Q driver array: HF: 19mm (0.75in.) aluminium dome, LF/MF: 115mm (4.5in.) magnesium/aluminium alloy cone
Amplifier Power	LF: 70W, HF: 30W
Wireless Features	Wi-Fi, Bluetooth 4.2
Streaming Services	Spotify Connect, Tidal
Inputs	TOSLINK Optical, 3.5mm Auxiliary
Resolution	24-bit/96kHz
Dimensions	240 x 155 x 180 mm (H x W x D)
Weight	3.6kg per speaker
Finish Options	Black, Blue, White