The TD-253 is a three-way frequency division and can be selected as a dual or three-way drive. 10 "IF system, high power, low distortion. If frequency adopts phase plug coupling technology to improve white clarity. Ultra-thin and deep, perfect for theaters with limited screen distance to the back wall. Products are rigorously tested to ensure their consistency. The height of the middle and high frequencies can be adjusted up and down to meet the coverage of the sound field.