The COMBINE4™ IEM transmitter combiner brings together up to four in-ear monitor transmitter signals into a single transmitting antenna. IEM transmitter combination is important for multi-channel systems to minimize intermodulation products arising from multiple adjacent transmitters interfering with one another. The COMBINE4™ works with any brand IEM and any type of directional antenna operating in the 470-960 MHz range. It is equipped with four BNC transmitter inputs, front-panel LED signal indicators for each input, and four DC output jacks that supply power to connected IEM transmitters. Includes one AC cable, four DC cables, and four BNC jumpers.