Let's face it, you're not buying a wireless mic system so you can perform in your bedroom or basement. You need it so you can rock the stage in front of a crowd. Your system needs to be mobile, It needs to be protected, It needs to be racked! And while many of the Audio Technica wireless systems have rack ears or rack mounts supplied you will probably need something that will rack 2 systems side by side. That's where the Audio Technica AT8630 kit comes in. The Audio Technica AT8630 joining-plate kit works with both the 3000 Series and 2000 Series receivers. It allows mounting two receivers in a single 19" rack space.