THX Ultrasound Speaker

THX Ultrasound Speakers were a type of speaker. In 5 ABY,The Essential Reader's Companion places Queen of the Empire in 5 ABY. 1138 of them played music throughout an amusement park space station called Hologram Fun World, located in the Zabian system.
==Behind the scenes==
THX Ultrasound Speakers were mentioned in the fifth novel of the Jedi Prince young readers series, Queen of the Empire, published in 1993. Allusions to George Lucas's first feature film, THX 1138, are made often throughout Star Wars material, and these homages have been officially acknowledged.
==Appearances==
*Queen of the Empire 
==Notes and references==
Category:Speakers