Bass Driver
The enormous 450mm (18in.) cone of the new Model 209 drive unit has a linear excursion of no less than 60mm. This is only possible by combining KEF’s ingenious double suspension system and critically designed large roll surround with a new double radial array of neodymium magnets powerful enough to create a constant 120mm long magnetic field.

ACE
KEF’s innovative ACE (Acoustic Compliance Enhancement) technology allows the massive resulting bass extension (-3dB at 15Hz) to be realised without a disproportionately large enclosure. By filling the cabinet with activated carbon, ACE almost doubles effective cabinet volume.

DSP
Digital Signal Processing equalisation facilities incorporating six frequency response presets for both line and LFE inputs, together with a unique system for self-adjusting its own output to suit the acoustics of the room using automated measurements of the listening area via the microphone supplied. All DSP facilities together with volume, phase, polarity and crossover parameters are adjustable by remote control.