Radial Engineering CATAPULT TX4M 4-Channel Transmitter Mic Level w/ Balanced Outscat5Why you need the Radial Engineering Catapult TX4M Cat5 Audio Receiver (4x4 Mic In Out): The Radial Catapult is a 4 channel audio snake that lets you send analog or AES digital audio signals over standard Cat 5 or Cat 6 shielded twisted pair cable. This allows stage techs to take advantage of the relatively low cost of this abundantly available cable for return snakes or for transporting balanced audio across a large stage. For the system contractor,