At most I'll say $300. I know that's not the best of the best. Just looking for something that will work. Room size depends on the room the event is in. I did an event in a room my friend has played in . The venue is in Jersey City, NJ and it's a big room. In that room you must use at least one sub or it won't sound right.How much money will you be spending? (Budget) How large of a room will they be used for the most part?