A gift to audiophiles, a THX sound system consists of components, mainly audio equipment, that meet rigid standards of quality so high usually only an audiophile could tell the difference. Produced by George Lucas, components that are THX certified can range from home theatre stuff to movie theatres. If you've ever seen the THX intro in a theatre, it's certified. Home theatre stuff has the THX logo on it and is expensive, and many companies make THX amplifiers, tuners, speakers, rooms, etc.