Urumqi honest and margin Exhibition Service Co., Ltd., your trusted exhibition, meetings, activities stop service provider! Stage background truss (stage (aluminum) and the background plate (square truss) in conference activities is essential. In most stage and backdrop used in meetings or celebrations. First need to determine the activity of the site according to the situation required background frame size stage and the stage height 500px-1500px, truss specifications:. 500px * 500px) Dual 15 stereo (two-sided 15 refers to the speaker treble too, there are two 15-inch bass called dual 15-inch. Speakers There are two 8-inch or 10-inch woofer (unilateral count), also known as dual 8-inch woofer with dual 10-inch subwoofer specifications.) has 10 to meet the needs of your various activities. (Set)