Black silk diaphragm, NdFeB driver (magnetic is 10 times that of ordinary black magnetic), the tooth is equipped with a fever-shaped tooth-shaped pure aluminum heat sink, which improves the ability to withstand high power Structure: neodymium magnet + silk film + toothed pure aluminum radiator + ABS frosted panel High-frequency materials; soft ball top wire film, neodymium magnet design Magnetic, some called high-strength magnet, also called magnetic, permanent magnet), with aluminum heat dissipation After actual testing and subjective audition, the high frequency is accurate and precise. the diaphragm can be well balanced with the mid-frequency, it is convenient to match the bass speaker, the sensitivity is moderate, and the small mid-bass is , but it is not recommended. It is equipped with a speaker of 8 inches or more (can be used as a super loud sound in a speaker). Impedance: 6 ohms Power: 30W Color: black Material: Silk film + aluminum + ABS board Size: Panel diameter: 52MM Height: 23MM Opening: 34MM Diagonal center hole distance: 45mm Panel thickness: 3mm Package Contents: 2 x Audio Speakers The above package contents only, 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 +/- 1-3 cm.