Dynamic balance speaker

A dynamic balance speaker, comprising a diaphragm, a voice coil, a printed circuit board, a base frame, a first tuning paper, a washer, a main magnet and a U-yoke, the base frame having a central through hole, the printed circuit board being provided with a pair of signal contacts;

• a bottom of the base frame being formed with a plurality of spaced first vents and a mounting groove in the middle between adjacent two of the first vents, left and right sides of the mounting groove being provided with positioning grooves, the printed circuit board being adhered and fixed in the mounting groove, left and right sides of the printed circuit board being provided with positioning portions, the positioning portions being fixed in the positioning grooves respectively, the first tuning paper being adhered onto the first vents, two sides of the voice coil being provided with a pair of lead wires that are arranged symmetrically relative to a center of the voice coil, free ends of the lead wires being fixedly connected to the signal contacts of the printed circuit board respectively, the lead wires being symmetrical to a center of the printed circuit board;
• the diaphragm being disposed above the voice coil, the U-yoke being fixed below the through hole of the base frame, the main magnet being fixed in the U-yoke, the washer being disposed on top of the main magnet, the voice coil surrounding the main magnet and the washer.