Awesome low-end from a cute, compact cube 

Getting very loud, very low-frequency, distortion-free bass from a subwoofer is very easy. The only problem is the size, cost and number of bass drivers you’d need to use to do it, and the fact that the cabinet you’d need to accommodate them all would have to be so big that it would take up a good deal of the available space in the average-sized living room.

The various parameters – size, cost, number of drivers and so on – can certainly be manipulated, but ultimately the final result will always be governed by the immutable laws of physics… and you can’t get around them.

Not that subwoofer manufacturers haven’t tried… and KEF has tried harder than most. In order to ensure that one of its smallest-ever subwoofers could deliver deep bass it even invented an innovative circuit it called ‘Intelligent Bass Extension’ or IBx for short.
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Read full post here:
https://www.whathifi.com/reviews/kef-kf92