Professional stage low frequency expansion dual 18-inch subwoofer with passive double 12-inch linear array sound. Its sound is full and clear. The professional speaker unit is used to enhance the long-range casting ability of the system, and smooth, high-fidelity, loud pressure, and dynamic clear music can be obtained in every corner of the vast audience area. The selection of high-quality wood to make the box, in the application of black floating paint, both fashionable and classic. In addition to strengthening the more effective protection of the horn, the front is equipped with a thickened metal mesh cover. For easy handling, the side is also designed with an integrated handle.