Abstract: A loudspeaker includes a magnet, a T-yoke, a frame, a top plate, a voice coil, a damper, a dust cap, a cone paper, and a gasket. The cone paper being provided with a surround, the gasket being located below the outer edge of the frame, the magnet being located above said T-yoke. A magnetic gap is formed between the top plate and the T-yoke. The voice coil being arranged in the magnetic gap, the voice coil including VC wire part and VC tube part. The top plate being provided with a riveted groove on the outer side, the top plate being riveting mounted in the frame via the riveted groove.