Hi Tony , I played a gig a few years ago at a high end Care home and when the wireless mic and receiver were switched on ,what came thro my speaker system was the bbc radio 2 broadcast ...we did the gig with the old fashion mic and cable set up . at the end of the gig I saw the manager and explained the situation .he said all I had to do was turn off the hearing aid loop !! played there many times since and never had any more problems .......hope this is of help ........Ciao Giovanni