Behringer Ultrapatch Pro PX3000 Multi-Functional 48-Point 3-Mode Balanced Patchbay Professional patchbay eliminates cable clutter in your studio and adding order and clarity Fully balanced high-quality  TRS connectors 3 modes, easily selectable per channel via top-side switches "Normal" interconnects the two rear jacks of one channel; inserting a plug into one of the front jacks interrupts the connection of the rear jacks "Thru" interconnects each rear jack with its corresponding front jack