Just a quick note. I have been using the Sennheiser 835 for about 2 years. I was having some problems with feedback on my Bose PAS system, so after reading the posts here purchased an EV N767...still feedback problems (although with the EV there is no switch to turn off). I have just upgraded the Bose with the newest software release...set the mic preset to "10" and amazingly enough not only is the feedback gone but I have never heard myself sound clearer...not necessary better...just a whole lot clearer. Once again, kudos to Bose and thanks to this group for the EV suggestion.

Art