The COMBINE8 IEM combiner brings together up to eight in-ear monitor transmitter signals into a single rear panel mounted antenna connector. Any brand IEM set to transmit 50 mW or less may be used, as well as any type of directional antenna. It also provides DC power to up to 8 IEM transmitters with an external power supply, removing the need for wall warts. IEM transmitter combination is important for multi-channel systems to minimize intermodulation artifacts arising from multiple adjacent transmitters interfering with one another. The CP Beam antenna is a recommended accessory for the COMBINE4 and is available with in a bundled package.