Song Dynasty Fumin Primary School in Huizhou City, case sharing of sound reinforcement system in stepped classroom. First of all, the ladder classroom needs to meet the needs of classes, meetings, speeches, and reports. We are equipped with left and right main sound reinforcement slightly, high quality speaker unit, can provide clean, clear, with penetrating sound reinforcement. slightly We also equipped power amplifiers, processors, power sequencers, audio isolators, mixing consoles, feedback suppressors, and microphones. We equipped the Song Dynasty microphone with a Gooseneck Song Dynasty tube and a handheld microphone. Tahoma