Radial Engineering Catapult RX4M Cat5 Audio Receiver (4x4 Mic Out)RX4M: Receive 4 outs & 4 mic level isolated outs. 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, the Catapult lets you take advantage of