Patent ID: 8295537

Claim:
A loudspeaker comprising: a first motor comprising a first armature; an acoustic diaphragm; a first lever arm, mechanically coupling the first armature and the acoustic diaphragm, the first lever arm coupled to a first pivot so that motion of the first armature causes rotation of the first lever arm about the first pivot, resulting in free body torque about the first pivot in a first direction; and a second motor comprising a second armature and a second lever arm, mechanically coupling the second armature and the acoustic diaphragm, the second lever arm coupled to a second pivot so that motion of the second armature causes the second lever arm to rotate about a second pivot resulting in free body torque about the second pivot in a second direction, different than the first direction the first motor and the second motor arranged in a manner such that the total free body torque resulting from the rotation of the first lever arm and the rotation of the second lever arm is less than the total free body torque resulting from the rotation of the first lever arm and the total free body torque resulting from the rotation of the second arm singly.