The blue trace in fig.2 shows the output of the LSX's woofer measured in the nearfield. The minimum-motion notch in its output lies at 58Hz, revealing that this is the tuning frequency of the flared port on the rear panel—a relatively high frequency, but to be expected in a small ...
So in summation, KEF makes fantastic products, has a weak dealer network, and needs to revamp their advertising and marketing to get more people excited by their products. You should hear a pair of LS 50 setup with the really nice little KEF R 400 sub you have a roughly $3k package tha...
I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the KEF LS50's frequency response in the farfield, and an Earthworks QTC-40 for the nearfield and spatially averaged room responses. My estimate of the KEF's voltage sensitivity was 84.5dB(B)/2.83V/m, which i...