A vibration reducing apparatus comprising, a baffle subject to vibration, a first
electroacoustical transducer characterized by a first mass seated in the baffle,
a second electromechanical transducer mechanically connected to said first transducer
or said baffle in the vicinity of the periphery of the first transducer. The rear
sides of the diaphragms of the first and the second transducer are not connected
to the listening area. The first transducer and the second transducer are constructed
and arranged to receive a common electrical signal so that the movable element
in the first transducer and the movable element in the second transducer move in
phase opposition in response to the common electrical signal to significantly reduce
the vibrating force imparted to the baffle.