Trunking is really about handling and leveling multiple audio sources, but not exactly how a DJ normally does it. I typically embody line input to handle it. Line input means 1 volt peak to peak at 600 ohms. When you handle audio very close to transmit gear, ditch the mixer board. I typically grab a cluster of RCA female plugs from an old audio appliance. Drill holes in the lid of a small paint mixing can and mount the cluster. One plug will be the output and others are audio sources. By selecting resistors for each source, levels can be established for a good mix. The can will shield out all hum. I pipe audio by putting Radio Shack 278-263 female RCA to F adapters on TV RGA 59 or 6 cable. Now you have cheap solid monstrous shielded audio lengths. RG 6 can be joined with others by gutting cable splitters and soldering wires inside. Avoid audio amplifiers and tone modification when possible. This will stamp out hum and faults. Your audio network will give the repeater class.
