Any part of a speaker that absorbs
energy will re-radiate it later in time in a highly distorted
manner. The radiation of this stored energy obscures subtle detail,
reduces clarity, and causes a loss of spatial information. Energy
is stored primarily in driver diaphragms and cabinet walls, especially
the front baffle.
To reduce unwanted vibration, THIEL constructs
cabinets with 1-inch thick cabinet walls and uses extensive internal
bracing to increase wall stiffness. Front baffle vibrations excited
by driver motions are reduced by using fiberboard baffles up
to 3 inches thick, or baffles of special materials such cast
mineral/polymer (CS6 and CS7.2) to further increase rigidity.
All THIEL drivers incorporate cast magnesium
chassis rather than stamped steel or plastic to increase mechanical
rigidity, and thus reduce unwanted vibration. Energy storage
is also reduced by minimizing diaphragm resonances.
to see a cutaway drawing of the CS2.3 woofer)
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