Hi! Have a NILES SVL-6 speaker control system Sony FM AM receiver STR-DH130 both attached to a Onkyo disc player, set up in a commercial space with in-ceiling speakers to play music. Using this equipment,is there any way to somehow set up a microphone so that we can walk the room and do a talk and have it come over the speakers? If not, what would be the quickest/cheapest way to have a wireless mic? Please be detailed. Thanks!!!