25 core 1 inch tweeter silk film dome speaker 30W4 ohm treble speaker .Impedance: 4 ohms.Power: 30W.Outer diameter: 57mm .Speaker unit : 25 core .Structure: neodymium magnet + silk film + toothed pure aluminum radiator + ABS panel .Treble speaker materials:1. Imported soft dome silk film,2. Neodymium magnetic design (neodymium magnet, some people call it high-strength magnet, also called magnetism, rare earth permanent magnet. It is a very high-grade magnetic species, the price is very expensive),3. With aluminum radiator,4. There is shockproof sponge pad on the back of the panel.Black 25MM silk diaphragm, neodymium iron boron drive (magnetism is 10 times that of ordinary black magnetism), fevered tooth-shaped pure aluminum heat sink is installed on the magnet, which enhances the ability to withstand high powerThe sound is clear and sweet, delicate and durable, with a sense of hierarchy, suitable for enjoying all kinds of music. The product adopts authentic imported silk sound film, matched with strong neodymium iron boron magnetic, high pitch transparent, silk into the buckle, to achieve soul treble, keep your sound away from dull. The magnet is equipped with heat dissipation design, which is more durable and lasting.After actual testing and subjective audition, the high frequency is meticulous and accurate, and there is quite a sense of monitoring. This is not related to MK starting from recording. Although the diaphragm is 25MM, it can take good care of the mid-frequency, it is more convenient to match the woofer, the sensitivity is moderate, and it is just right to match the small mid-bass, but it is not recommended to match the speaker with more than 8 inches (it can be used as a super high-frequency in large speakers). Generally speaking, it is an extremely cost-effective speaker.Package : 2 pcs .