Heck yes! For every single piece of equipment used too. From computers to microphones, speakers to dress shirts. You name it – I have a second one on hand.
But wait – there’s more! Not only do I have backup equipment with me – it is of the same quality of equipment that is normally used. Usually the word “backup” means it is a cheaper / worse version than what you would normally use. If something were to happen to a piece of equipment I can replace it on the spot with the same exact thing. Not a lower grade product that will inherently lower the quality of your wedding.
Equipment failure is not a matter of “if” it will happen – but “when” it will happen. I am prepared. Fail to plan – plan to fail.