Material analysis: ①. Black painted aluminum plate②. Sound film protection net cover③. Composite ceramic sound film④. Washer⑤.70MM magnet⑥. Sound-absorbing cavity⑦. Short circuit copper ring⑧.T iron⑨. Independent vibration cavityThe imported silk edge + high-grade ceramic composite film not only has the warm sound of the silk film, but also solves the general problem of treble and ultra-low and dim sound. This material usually appears on high-end tweeters. The short-circuit copper ring method is to place a copper or aluminum short-circuit ring on the outer diameter of the magnetic column or the inner diameter of the magnet.The role of the secondary coil of the voice coil, due to the short-circuit effect, the voice coil inductance is close to zero, and the short-circuit ring makes the non-linear inductance of the magnetic material change small, thereby reducing the distortion of the speakerIndependent acoustic cavity + high-density sound-absorbing cotton can effectively eliminate the multiple harmonics generated in the sound film during the high-frequency vibration. The second enhanced reinforcement penetrates the sound film and spreads to the human ear. The more the sound will be heard, the more flavorTransparent, clear, high sensitivity, stable magnetic field, reducing distortion, improving sound quality, eliminating multiple harmonics, and no color interferenceWeight: 0.604KGMagnetic steel: 70MMSize: 110MMVoice coil: 25-core composite ceramic membranePower: 30W-60WDC Impedance: about 6.8ohmSensitivity: 94DBFrequency response: 1.2K-22KPackage:1pcs