RS19-4U is a studio rack which is suitable for 19’’ equipment. Its alum tube combination with 19’’ holerack strips which make the construction more sturdy and stable. Insert the thumbscrew into thumbscrew holes to lock the devices on the rack. According to device’s height, you can move the device up and down flexible,arranging the devices in one line, also featuring better diffusion. One rack can arrange 4 devices. When at stage performance, EVA reduces the thrill in a way.