What's called full-range speaker unit

Full-range speaker units are also called wide-band speakers. Earlier, speakers that can cover the frequency range of 200-10KHz are called full-ranges speakers. In recent years, full-frequency speakers have been able to cover frequencies of 50-25000Hz. For the sake of correct addressing, the "full-range speaker" will be referred to as "full-range speaker unit" or simply "speaker unit" or "speaker" in accordance with industry practices.

Classification of full range speaker units
According to the grade, it can be divided into three types: high, middle and low. Divided by performance (division by price is unfair):
Low-end: 150-15KHz products for PC/TV/multimedia, full power distortion> 20%, the product size is generally 2 inches to 4 inches or 5090 rectangular speakers.
Mid-range: cover products generally at 80-18KHz, full power distortion> 5%, product sizes from 3 inches to 10 inches
High-end: It is generally believed that the frequency band for full performance of symphony should cover at least 45-20KHz, full power distortion> 2%, and the general size on the market is between 5 and 8 inches XDEC speaker.