Barefoot Footprint01, Owner'S Manual

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Cabinet vibrations are a significant source of distortion and coloration in most loudspeakers. The primary
mechanism that generates cabinet vibrations is simple Newtonian action and reaction. As the driver motor
(magnet and voice coil) forces the cone to move back and forth in order to generate sound, the cone exerts an
equal and opposite force on the motor. This force is transmitted through the driver frame to the cabinet,
vibrating the cabinet walls and coloring the sound emitted by the cone. This effect is most especially prevalent in
the low frequency drivers where the cone motion is greatest.
While, the Footprint01 is built with a massive and well braced cabinet, we also tackle the problem at its source by
eliminating vibrations before they even begin. This is achieved through our innovative force cancellation design.
The low frequency drivers are mounted on opposing sides of the cabinet and their motors are locked together.
As the cones are driven in and out in opposite directions the forces exerted on the motors cancel one another.
The vibrations never make it to the cabinet because they are not allowed to develop in the first place.
This layout has further benefits. Since the drivers are locked together, the motors and frames function as a
massive internal metal cabinet bracing. And because the wavelengths generated by the woofers are much larger
than the speaker cabinet dimensions, the drivers radiate as if they were a single point source.
10.0 Dual - Force
™
Technology