Having had a little Stage experience, I am puzzled by the 'need' for delays - in very precise setups in specially designed rooms which seriously control reflected sound by absorbing it in a controlled manner so that 'extra push' can be calculated with some degree of sanity, it may do some good, but in the average 'country hall' with reflective surface walls and ceilings (in Aus they would be painted fibro/masonite, and or perhaps walls made of VJ timber boards), I can only imagine a nightmare, and adding 'delays' would make it worse over most of the room, surely...