Black silk diaphragm, NdFeB drive (magnetic is 10 ordinary black magnetic), the tooth is equipped with a -shaped tooth-shaped pure aluminum heat sink, which enhances the to withstand ! Structure: neodymium magnet + silk film + toothed pure aluminum radiator + ABS frosted panel High-pitched materials; soft ball top wire film, neodymium magnet design Magnetic, some people called high-strength magnet, also called magnetic, permanent magnet), with aluminum heat dissipation After actual testing and subjective audition, the high frequency is meticulous and accurate. diaphragm can be well balanced with the intermediate frequency, it is convenient to match the woofer, the sensitivity is moderate, and the small mid-bass is , it is not recommended. It is equipped with a speaker of 8 inches or more (can be used as a super high sound in a speaker). Impedance: 6 ohm Power: 30W Colour:black Material:Silk film + aluminum + ABS board Size: Panel diameter: 52MM Height: 23MM Openin:34MM Diagonal center hole distance: 45mm Panel thickness .: 3mm Package Contents: 2 x Audio Loudspeaker Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.