If you're gearing up for a big indoor event, then the audio visual department is important to get down perfectly. It will help you come off as professional. If you don't know much about AV, consider hiring an AV production company. They can help you in a lot of ways.
Help You Save Money
Not knowing a lot about AV equipment can actually end up costing you money. You may purchase the wrong type of equipment or too much of it, making it quite easy to go over budget.