Sennheiser evolution wireless G4 300 Series Instruction Manual page 64

To connect the receivers to the ASA 214 antenna splitter:
Connect one of the receiver's antenna inputs to one of the BNC sockets
▷
A1 to A4 using one of the supplied BNC cables.
The compatible receivers listed above do not require their own power
supply. They are powered via the BNC sockets A1 to A4.
▷ Connect the receiver's other antenna input to one of the BNC sockets
B1 to B4 using one of the supplied BNC cables.
Installing the ASA 214
63