9 Mics: cables and radio
A sound cable needs to be as ‘transparent’ as possible to the signal it's carrying. Hopefully, you won't be required to undertake very long cable runs, but as you can imagine, the output from a microphone is pretty small, and if you have losses or interference brought about by your cable and/or its connectors, it spells extremely bad news.
Put simply, a balanced signal path is one which has the two signal legs (live and return) separated from the earth (screen). A properly screened cable will greatly assist in the reduction of interference (induction) from other sources (Figure 9.1).
To further assist the integrity of the circuit, many professional cables have two wires for each of the legs, and are constructed ...