a shown as a non inverted convex configuration and convex dome diaphragm 18 a including a central cutout opening 28 with central flat dust cap cover 24 mounted to complete the diaphragm 18 a the diaphragm 18 a is attached to coupler 20 and flat central dust cap 24 may be attached to either one or both of diaphragm 18 a and voice coil former 21 fig8 shows a cut away view and fig8 a a close up view that depicts a seventh example low profile loudspeaker transducer device 10 g the seventh example 10 g is similar to the device in fig6 but is configured as a low profile coaxial transducer with a high frequency tweeter transducer 27 mounted in the opening 28 cut out of diaphragm 18 a the tweeter 27 may be mounted on top of t yoke 12 and in vented pole piece opening 22 spaced away from the inner surface of voice coil former 21 diaphragm 18 a is attached to coupler 20 and coupler 20 is attached to voice coil former 21 fig9 shows a cut away view that depicts an eighth example low profile loudspeaker transducer device 10 h the fourth example 10 h is similar to the device of fig1 with the main difference being that of the magnet structure 13 c mounted inside of the voice coil former 21 in this embodiment magnetic structure 13 c preferably uses at least one high energy magnet 13 d such as neodymium or samarium cobalt to better accommodate the magnet structure 13 c the u yoke structure 12 c is arranged outside of the magnet structure 13 c and voice coil former 21 and top plate 14 a is.