PISTONIC MOTION, LARGE EXCURSION PASSIVE RADIATOR

摘要

A passive radiator assembly (42) for a speaker that substantially reduces diaphragm resonance in the operating frequency range of the device. The new passive radiator assembly (42) includes a quasi-elliptical shaped laminated honeycomb diaphragm (44), which is damped by an integral outer compliance (suspension) made of an elastomeric material that covers the entire upper surface of the diaphragm. The integrated outer compliance (70) is of a progressive type, having a stiffness that increases in a controlled fashion during large excursions. To prevent non-linear rocking movements and compensate for displacement non-linearities, at least one, and preferably two, opposed spiders (88, 90) supported by a spider assembly frame are used to provide a restoring force applied to the diaphragm.