RF Venue COMBINE4 COMBINE4 - 4-Channel Antenna CombinerThe COMBINE4 from RFvenue is an antenna combiner that was developed for cross brand flexibility for IEM (In Ear Monitor) systems. The four channel Radio Frequency (RF) combiner receives four incoming IEM transmitter RF signals and combines them to a single convenient front panel mounted output connection. The unit features a high quality internal power supply and includes DC and RF jumper cables required for four channel IEM system operation.