Inverted motor transducer with front spider

An electrodynamic transducer, comprising:

• a rear frame defining an open frame interior;
• a front frame enclosing the open frame interior and attached to the rear frame, the front frame including a center hub disposed about a central axis of the transducer;
• a movable diaphragm positioned within the open frame interior and operably connected to the rear frame;
• a magnet assembly disposed forward of the diaphragm and coupled to the center hub, the magnet assembly defining a magnetic air gap annularly disposed about the central axis;
• a voice coil disposed in the magnetic air gap surrounding the magnet assembly and operably connected to the diaphragm;
• a first spider coupled between the voice coil and the rear frame behind the diaphragm;
• and
• a second spider disposed forward of the diaphragm, the second spider including an inner flange attached to the center hub, and an outer attachment portion attached to the diaphragm on a front side thereof, and an undulation portion therebetween, wherein the second spider provides a barrier to protect the voice coil and the magnetic air gap from contact with foreign particles.

An electrodynamic transducer, comprising:

• a rear frame defining an open frame interior;
• a front frame enclosing the open frame interior and attached to the rear frame, the front frame including a center hub disposed about a central axis of the transducer, the center hub including an outer wall, an inner wall, and an annular interior formed between the inner and outer walls, the center hub including spaced apertures in a top portion thereof which allow the annular interior to communicate with the ambient environment;
• a movable diaphragm positioned within the open frame interior and operably connected to the rear frame;
• a magnet assembly disposed forward of the diaphragm and coupled to the center hub, the magnet assembly defining a magnetic air gap annularly disposed about the central axis and in communication with the annular interior of the center hub;
• a voice coil disposed in the magnetic air gap surrounding the magnet assembly and operably connected to the diaphragm;
• a first spider coupled between the voice coil and the rear frame behind the diaphragm;
• and
• a second spider having an undulating configuration, the second spider coupled between the diaphragm and the center hub and disposed forward of the diaphragm, wherein when an electrical signal is passed through the voice coil to cause the voice coil and diaphragm to oscillate, the second spider pumps air in and out of the transducer through the magnetic air gap and the annular interior of the center hub.