Problem: You want to connect three microphones to a mixing console on which only one channel is available.
Solution: Connect an ART ProMIX between the microphones and the mixing console. In addition to phantom power, each microphone channel has a switchable low-cut filter and a separate level control. Connect the balanced XLR line output to a microphone input of the mixing console. A Phones/Aux output is available for connecting headphones or an active monitor. And if there is no power outlet nearby, you can also operate the ProMIX with batteries.
Radial Mix 2:1 Passive Summing Mixer
Rolls MX-28
Rolls MX-41b
ART SPLITMix4