Flat plate-type bass loudspeaker

A flat plate-type bass loudspeaker, comprising a flat plate-shaped vibration diaphragm, at least three driving units independent from each other and a housing for fixing and combining the vibration diaphragm and the driving units,

• wherein, the driving unit comprises a voice coil unit and a magnetic circuit unit corresponding to the voice coil unit, and the voice coil units are separately combined and fixed at one side of the vibration diaphragm closer to the housing,
• mounting holes for accommodating and fixing the magnetic circuit units, and sound holes penetrating through the housing and communicating with outside are arranged on the housing, the number and positions of the mounting holes are corresponding to the number and positions of voice coils attached to the dome part of the vibration diaphragm, and
• a ratio of total area of the sound holes to area of the orthographic projection of the vibration diaphragm on the housing is less than 0.9.