The A-182-4 Dual Rotary Switches are a switch/signal router for all kinds of signals within a Eurorack system. The identically designed channels A and B work bidirectional, so you have the free choice to switch a signal to one of four destinations or to route one of four sources to one destination; per channel of course. A rear Jumper allows an alternative use of the module: if this is set, channels A and B are connected in such a way that signals can be routed from A1 to B4, A3 to B2 or A4 to B4, ideal for setups with few, fixed connections.