Loudspeaker with passively controlled voice coil sections

A method for driving a voice coil of a loudspeaker comprising:

• providing a magnetic circuit having an air gap and a voice coil suspended in said air gap;
• and
• applying an audio signal to said voice coil suspended in said air gap to produce an electromotive force moving said voice coil along a travelling axis;
• wherein said voice coil comprises a plurality of voice coil sections, arranged along said travelling axis, said plurality of voice coil sections comprising a center voice coil section, an upper voice coil section and a lower voice coil section, said upper voice coil section and said lower voice coil section arranged respectively on either side of said center voice coil section;
• wherein said of applying said audio signal comprises providing a center driving signal based on said audio signal to said center voice coil section and providing an auxiliary driving signal based on said audio signal to said upper voice coil section and said lower voice coil section, said providing an auxiliary driving signal comprising providing an upper rectified driving signal to said upper voice coil section and providing a lower rectified driving signal to said lower voice coil section;
• wherein said upper rectified driving signal is provided by attenuating, or blocking, a first direction of current of said auxiliary driving signal by passive rectification;
• wherein said lower rectified driving signal is provided by attenuating, such as blocking, a second direction of current of said auxiliary driving signal by passive rectification;
• and
• wherein said first and second direction of current of said auxiliary driving signal are opposite directions of current.