How to connect X6100/X6200 to XPA125B Amplifier? X6100 can expand the output power to 100W when connected to the XPA125B power amplifier through a L4001 cable. After connection, X6100 can automatically control the band switching of XPA125B. At the same time, ALC control will be established between the two machines. When the power output from X6100 to XPA125B exceeds the limit, it will be automatically reduced, so that the output power of XPA125B is constant at about 100W. We recommend you set the output power of X6100 to ≤2.5W to protect the power amplifier equipment.