Speaker with improved bl characteristics and electronic device including the same

An electronic device comprising:

• a housing including a first surface, a second surface facing in an opposite direction to the first surface, and a side surface at least partially surrounding a space between the first surface and the second surface;
• and
• at least one speaker disposed inside the housing between the first surface and the second surface,
• wherein the speaker comprises:
• a frame,
• a diaphragm connected to the frame,
• a yolk disposed to face the diaphragm and including an avoidance groove formed on a surface thereof facing the diaphragm,
• a coil mounted to one surface of the diaphragm and disposed between the diaphragm and the yolk, and
• a first magnet mounted to the yolk and disposed to be surrounded by at least part of the coil or a second magnet disposed to surround at least part of the coil,
• wherein the coil has a smaller width on a surface thereof facing the yolk than the avoidance groove,
• wherein the coil is disposed to make the surface thereof facing the yolk correspond to the avoidance groove, and
• wherein the coil is configured to linearly reciprocate the diaphragm on the frame by receiving an electric signal.