Point Drive



         Since when Earth will began the rotation?





Point Drive Speaker

is the technique that Edison invented.A Phonograph Sound Box Is A Mechanical Point Drive Speaker

Point-drive Speaker is using the 3 fundamental theories of existing technique “Looped reproducing system”, “Theory of point connection” and natural phenomenon “Theory of opposite phase”.

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Looped reproducing system

is modelling the system of musical instrument generating the sound and is defined as follows:
Vibration reproducing system connects main vibrating parts such as driver unit, movable part and diaphragm plate in a loop line.
Looped reproducing system

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This speaker generates

non-plane wave, therefore, sound phase of diaphragm plate at each place is not equal and both sound phase does not deny each other. A sound box is a point drive speaker

It is not necessary to install an unit into the box. This is the plate diaphragm speaker of open to back, and reproducing till 30 Hz.

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