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Not all wireless systems are the same.

Typical wireless systems use just one frequency or channel to transmit the radio signal. Unfortunately this frequency is very similar to many household appliances such as microwaves, mobile phones and wireless Internet routers, which can interfere with the transmitted sound signal causing unwanted dropout of sound and distortion.

KEF's wireless system is different. With its revolutionary new transmission technologies constantly monitoring and adjusting for interference, high-quality wireless sound is ensured, all the time.


KEF's wireless system is completely different. Play Movie >
KEF have developed innovative new technologies to deliver high-quality wireless audio, while at the same time avoiding signal interference.

A narrow signal band is used that is sufficient enough for high-quality audio transmission yet perfect for finding a path through the congested environment of a home filled with potentially conflicting devices. This narrow band is a feature of HFADPCM (High Fidelity Adaptive Differential Pulse Code Modulation), and along with advanced error correction technology ensures an exceptionally robust delivery of CD-quality audio between the transmitter and receivers.

The system detects other transmitters in the 2.4GHz frequency band - such as cordless phones, Wi-Fi routers and microwave ovens - then 'hops' out of the way of potentially conflicting signals. With this technology known as AFHSS (Advanced Frequency Hopping Spread Spectrum), a processor constantly monitors several channels at a time and continually switches to the strongest available to ensure a pure signal. It's all done in milliseconds so you don't notice it's happening: so nothing gets in the way of your enjoyment.