Generally speaking, as long as the frequency response curve of an intermediate frequency horn is flat, the effective frequency response range is greater than the width of the sound frequency band it bears in the system, and the impedance, sensitivity, and low-frequency unit are consistent, it is sufficient. Sometimes the power capacity of the midrange is insufficient, and it is also possible to choose a midrange with higher sensitivity and impedance than the bass unit, thereby reducing the actual input power of the midrange unit. There are generally two types of mid-range units: cone and dome. It's just that its size and power capacity are larger than those of tweeters, making it suitable for playing mid range audio. The diaphragm of the midrange unit is mainly composed of soft materials such as paper pots and silk films, and occasionally there is a small amount of alloy ball top diaphragm.
