THX (Simpsons)

"TURN IT UP. TURN IT UP!"

THX is a sound quality assurance system. The Aztec Theater in Springfield is THX-certified. They are well-known for their ID, featuring the Deep Note SFX that has ruined body parts for years. One such event body-part-ruining was captured in the episode "Burns' Heir". Their slogan is "The Audenice is Listening".