Surroundless loudspeaker

A surroundless loudspeaker system comprising:

• a frame having a cylindrical supporting portion extending in an axial direction of the loudspeaker system and mounted in a cabinet;
• a magnetic circuit provided at an end of the frame;
• a coil bobbin having a voice coil disposed in a magnetic gap of the magnetic circuit;
• a diaphragm having a peripheral free edge and connected to the coil bobbin at a central portion thereof;
• a cylindrical ring secured to the free edge and disposed in the cylindrical supporting portion of the frame;
• an annular sealing member secured to the cylindrical ring so that an outside peripheral wall of the sealing member is slidably contacted with an inside wall of the cylindrical support portion of the frame;
• a damper provided between the cylindrical supporting portion and the coil bobbin for supporting the coil bobbin, and for forming a closed space between the diaphragm, the cylindrical ring, the sealing member and the damper;
• the damper having an air permeability larger than a predetermined value so as to restrict flow of air in the closed space passing through the damper.