Horn super tweeter with pure magnesium diaphragm having superior internal loss and less unpleasant sound inherent in metal material realizes the super high frequency reproduction. Stronger magnetic circuit using two pieces of 40mm alnico magnets. High rigidity Silver-Copper alloy wire is used for the voice coil, and 1.4mm of the same material wire is used for internal connections. Newly designed horn with new cutoff frequency is made of ultra-precision cut solid brass. Copper terminal & coated late/pole realize the super-low distortion current. Tungsten diaphragm ring & washers are employed to reduce vibrations largely.