Q: How many Rack Units does the X3 Pro take up? A: 3 Rack Units   Q: What are the dimensions of the POD X3 Pro? A: X3 Pro Dimensions: Width: 17" (19" including the ears) Heighth: 5" Depth: 8"   Q: The Specifications on the web states that the X3Pro requires USB 2.0 but the actual USB input on the back panel is not labeled. Does it required USB 2.0? A: POD X3 Pro, as well as POD X3 and X3 Live, requires USB 2.0. For details on USB connectivity ple