Heinrichs' NAP4S is a popular used model for TCP/IP network audio system solution. it is used to transmit audio over network to amplifier and loudspeakers. So the nominal connection way as below: Control port by RJ45 connector to LAN switch and analogue outputs to amplifiers.

The IP network audio adapter has 19" rack mounted design, so it is usually the biggest advantage of the network audio system. It has super distance audio transmission, simultaneous maximum program task and non-dedicated network wiring installed in the control room together with high watts power amplifier for a big size application. An amplifier can be installed in each floor or local terminal area using this LAN network technology. As a result, cable wiring costs will be reduce.