My mate Big Mick is the front-of-house engineer for Metallica and has the record for the largest sound system ever assembled. It was 1,200,000W and was for 1,500,000 people at the Monsters of Rock festival in Russia, which took place after the Iron Curtain came down. After all, speaker systems have to suit the amount of people assembled, or the space they are expected to cover; the THX Select and Ultra specifications, for instance, are all about the cubic capacity or volume of the room the systems are designed to fill.



Link: TechRadar