Isolated front baffle -. The mid bass drive unit is actually screwed to the black super high density panel not the enclosure’s ‘carcass’. In turn this black panel is adhered to the carcass via a thin layer of visco-elastic material. The benefit is a much reduced amount of vibration in the frame of the bass mid driver is passed on into the carcass. This reduces the ‘ringing’ of whatever resonant frequency the carcass of the enclosure might be. This then reduces cabinet borne colouration of the overall acoustic output of the loudspeaker quite dramatically.
We have taken reasonable care to reduce the amplitude of cabinet resonances but this method reduces them even more by simply not exciting cabinet resonances in the first place.
KEF designers – The idea is well understood and has been used by many manufacturers over the years including Andrew Jones while working at KEF. It is not always or often used currently due to the constructional complications it creates. Our method of adhering a separate front baffle onto the normal front baffle is a somewhat simpler solution than the usual complex rubber mounting arrangements employed by KEF and others. We may not be obtaining as much isolation as the rubber mounted solution but ours is simpler to manufacture and likely more reliable in the longer term as there are no rubber parts to perish. The tweeter drive unit is mounted to the main carcass of the enclosure and in effect is isolated from the bass unit as well. A further advantage towards the goal of clean treble performance from a drive unit not effected by vibration.