You may need to rent from your DJ a 3rd speaker. This is very important if the room is broken up.  An example is- the DJ is set up in one room that will be the dance room (exactly where he should be). But, the dinner and toasts are in another room.  You will probably want to enjoy the music you have asked for and use the wireless mic for toasts. The actual sound doesn’t get there by magic. You must have a speaker in that room!  Typically a extra speaker is $60.00 more. Well worththe money. Through the night all in that room will have music and be able to hear announcements.