RB-MS4X3, 4 x 1:3 Mic/Line splitter (XLR). Passive 4 double 1:3 splitter for microphone or line signal. 1 of the outputs is directly connected and 2 are isolated with high-quality transformers that handle input signals of up to +18dBu. Inputs and outputs on XLR connectors. Phantom voltage can be supplied in 3 ways, via external 48VDC, via output 1 or via output 2. Output 2 and 3 also have ground lift via switches on the front panel. Size: 19 inches/1U.