15'' Pro Driver
Rocking mode - Decomposition of movement components

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Total Vibration @ 150 Hz
(amplitude color coded)

Circular component @ 150 Hz
(phase color coded)

Radial component @ 150 Hz
(phase color coded)

Circular component @ 150 Hz
(cross section)

Radial component @ 150 Hz
(cross section)

The decomposition of the cone movement shows clearly a rocking mode at 150 Hz in the circular component. This causes an audible rubbing of the voice coil in the gap.