Barefoot Sound MiniMain12, Руководство пользователя

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9
Voice Selector Connection:
The Voice Selector switch box is connected to the
Voice jack of the speaker via any standard 3.5 mm
stereo phone cable. The included 6-way splitter
can be used to control the Voice Emulation of up to
5 speakers. However, the input impedance of the
Voice jack is very high. So, additional splitters can
be daisy chained in order to control virtually any
number of speakers.
Caveat: Plugging the speaker into different mains
outlets can potentially cause erratic behavior in the
Voice control. The safety grounds of different
outlets can sometimes have ground potential
differences of a few volts of more. The resulting
voltage spread between the grounded chassis of
various speakers can cause the Voice control inputs
to read incorrect settings or become unstable.
Care must be taken with the studio mains power
and safety ground layout. If this is a concern,
please consult a qualified electrician.
Example: 5 channel Voice Emulation control layout.
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 MiniMain12 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 subwoofers are much larger than the speaker cabinet
dimensions, the subs radiate as if they were a single point source
located on axis with the tweeter.
8. Force Cancellation