Rarely am I asked to provide more than 6 radio mics but following a recent booking enquiry I thought it a good idea to push the envelope a bit. Radio mics interfere with each other in an exponential sort of way, so it becomes progressively more problematic as you add more channels. Here we have 12 channels all playing nicely with each other………not the sort of thing you want to leave till the last minute. Changing location, however, could mean starting from scratch again.