A mid-array speaker is usually a loudspeaker driver that reproduces a band of frequencies usually in between one–six kHz, normally called the mid frequencies (between the woofer and tweeter). Mid-selection driver diaphragms can be fabricated from paper or composite resources and can be immediate radiation drivers (rather like smaller woofers) https://miffyspeaker45329.isblog.net/about-miffy-speaker-46985283