SPEAKER AND SPEAKER SYSTEM

摘要

PROBLEM TO BE SOLVED: To cancel a force reacting to the sound radiation force of the diaphragm of a speaker by using an airtight chamber and a through hole bored in a center pole. SOLUTION: The airtight chamber 27 is provided at the internaldiameter upper part of a 1st diaphragm 7 constituting the vibration system of the speaker A and then held on a frame 5 by a holding member 29, and air to the airtight chamber 27 is discharged into a speaker box or sucked in through the through hole 3c bored in the center pole 3a according to the driving of the 1st diaphragm 7.