 The crowd was so huge that most of the audience were not able to see the stage.However the sound from the stage speakers was augmented 200 feet from the stage by four delay towers, towers with speakers wired to the stage amps but with a 0.175 second delay provided by Eventide digital delay units, so that by the time the sound from the stage speakers reached the tower area through the air, the sound from the delay towers was synchronized with the stage sound.There were six more delay towers arranged radially 200 feet further from those towers - 400 feet from the stage - and six more towers 200 feet further out.