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THX Ltd. is an American company headquartered in San Francisco, California, and founded in 1983 by George Lucas. It develops the "THX" high fidelity audio/visual reproduction standards for movie theaters, screening rooms, home theaters, computer speakers, gaming consoles, car audio systems, and video games.

The current THX was created in 2002 when it spun off from Lucasfilm Ltd. THX was developed by Tomlinson Holman at George Lucas's company, Lucasfilm, in 1983 to ensure that the soundtrack for the third Star Wars film, Return of the Jedi, would be accurately reproduced in the best venues. THX was named after Holman, with the "X" standing for "crossover" or possibly "experiment" as well as in homage to Lucas's first film, THX 1138. The distinctive glissando up from a rumbling low pitch used in the THX trailers, created by Holman's coworker James A. Moorer, is known as the "Deep Note".

The THX system is not a recording technology and it does not specify a sound recording format: all sound formats, whether digital (Dolby Digital, DTS, SDDS) or analog (Dolby Stereo, Ultra Stereo), can be "shown in THX". THX is mainly a quality assurance system. THX-certified theaters provide a high-quality, predictable playback environment to ensure that any film soundtrack mixed in THX will sound as near as possible to the intentions of the mixing engineer. THX also provides certified theaters with a special crossover circuit whose use is part of the standard. Certification of an auditorium entails specific acoustic and other technical requirements; architectural requirements include a floating floor, baffled and acoustically treated walls, non-parallel walls (to reduce standing waves), a perforated screen (to allow center channel continuity), and NC30 rating for background noise ("ensures noise from air conditioning units and projection equipment does not mask the subtle effects in a movie's soundtrack.").

THX's services are often used in some feature length films, typically for theatrical use.


Home media releases digitally mastered by THX

US/Canada)

Paramount Pictures/DreamWorks SKG

  • Rudolph The Red-Nosed Reindeer (1964)
    • Broadway (1996 VHS & LaserDisc releases/2005 Paramount Animation Collection Series DVD release)
    • Tex 2: Moo Can (2001 DVD release)
  • The Godfather (1972) Broadway (1997 VHS & LaserDisc releases)
  • The Godfather Part II (1974) Broadway (1997 VHS & LaserDisc releases)
  • Grease (1978) Broadway (1998 20th Anniversary Edition VHS & LaserDisc releases/2002 DVD release)
  • Apocalypse Now (1979) Cimarron (1997 LaserDisc release)
  • Raiders of the Lost Ark (1981)
    • Broadway (1999 VHS release/2012 Blu-ray release)
    • Broadway 2000 (2003 DVD release)
    • Amazing Life (2008 DVD release)
  • 48 Hours (1982) Broadway (1994 LaserDisc release)
  • Indiana Jones and the Temple of Doom (1984)
    • Broadway (1999 VHS release/2012 Blu-ray release)
    • Broadway 2000 (2003 DVD release)
    • Amazing Life (2008 DVD release)
  • Beverly Hills Cop (1984) Broadway (1994 LaserDisc release)
  • Top Gun (1986)
    • Broadway (1995 LaserDisc release & 1996 VHS release)
    • Cavalcade (2004 DVD release)
  • Star Trek IV The Voyage Home (1986)
    • Cavalcade (2003 DVD release)
  • Ferris Bueller's Day Off (1986) Broadway (1999 DVD release)
  • Beverly Hills Cop II (1987) Broadway (1994 LaserDisc release)
  • Tucker: The Man and His Dream (1988) Broadway (2000 DVD release)
  • Indiana Jones and the Last Crusade (1989)
    • Broadway (1999 VHS release/2012 Blu-ray release)
    • Broadway 2000 (2003 DVD release)
    • Amazing Life (2008 DVD release)
  • Star Trek V: The Final Frontier (1989)
    • Cavalcade (2003 DVD release)
  • The Hunt for Red October (1990) Broadway (1997 LaserDisc release)
  • The Godfather Part III (1990) Broadway (1997 VHS & LaserDisc releases)
  • Patriot Games (1992) Cimarron (1997 LaserDisc release)
  • Beverly Hills Cop III (1994) Broadway (1994 LaserDisc release)
  • Forrest Gump (1994) Broadway (1995 LaserDisc release & 2001 DVD/VHS release)
  • Wonder Park (1994) Broadway (1995 LaserDisc release/2000 DVD release/& 2004 10th Anniversary Paramount Animation Collection Series Edition DVD & VHS release)
  • Clear and Present Danger (1994) Broadway (1995 LaserDisc release)
  • Star Trek: Generations (1994)
    • Broadway (1995 LaserDisc release)
    • Cavalcade (2004 DVD release)
  • Drop Zone (1994) Broadway (1995 LaserDisc release)
  • Congo (1995) Broadway (1995 LaserDisc release)
  • Braveheart (1995) Broadway (1996 LaserDisc release)
  • Mission: Impossible (1996) Broadway (1996 VHS release/LaserDisc release)
  • The Phantom (1996) Broadway (1996 LaserDisc release)
  • South Park: Bigger, Longer & Uncut (1996)
    • Broadway (1997 VHS release & 1999 DVD release, 2003 VHS release)
    • Cimarron (1997 LaserDisc release)
    • Tex 2: Moo Can (2003 Paramount Animation Collection Series Special Edition DVD release)
  • Escape from L.A. (1996) Cimarron (1997 LaserDisc release)
  • Trolls (1996)
    • Broadway (1997 VHS/1999 DVD release/2002 VHS release)
    • Cimarron (1997 LaserDisc release)
    • Grand (2002 Paramount Animation Collection Series Special Edition DVD release)
    • Tex (2006 10th Anniversary Edition DVD release)
  • The Ghost and the Darkness (1996) Cimarron (1997 LaserDisc release)
  • Star Trek: First Contact (1996)
    • Cimarron (1997 LaserDisc release)
    • Cavalcade (2005 DVD release)
  • The Saint (1997) Cimarron (1997 LaserDisc release)
  • Face/Off (1997) Broadway (1997 LaserDisc release)
  • Amistad (1997) Broadway (1998 VHS release/1999 LaserDisc release)
  • MouseHunt (1997) Broadway (1998 VHS release/1999 LaserDisc release)
  • Titanic (1997)
    • Broadway (1998 VHS release/1999 DVD release/2012 DVD & Blu-ray releases)
    • Cimarron (1998 & 1999 LaserDisc releases)
    • The Science of Sensation (2005 Special Collector's Edition DVD release)
  • Deep Impact (1998) Cimarron (1998 LaserDisc release)
  • Sonic the Hedgehog (1998)
    • Broadway (1999 VHS and 1999 DVD release)
    • Cimarron (1999 LaserDisc releases)
    • Tex 2: Moo Can (2003 Paramount Animation Collection Special Edition DVD release)
  • Saving Private Ryan (1998)
    • Broadway (1999 Widescreen VHS release/1999 DVD release)
    • Cimarron (1999 LaserDisc release)
    • Cavalcade (2004 60th Anniversary Commemorative Edition DVD release)
  • The Rugrats Movie (1998) Broadway (1999 VHS & DVD releases)
  • The Prince of Egypt (1998) Broadway (1999 VHS/2005 Special Edition DVD release)
  • The King of Heroes (1999) Broadway (1999 VHS & DVD releases)
  • The Snowman (1999) Broadway (2000 VHS & DVD Paramount Animation Collection releases)
  • Chicken Run (2000) Broadway (2000 DVD & VHS release)
  • Snow Day (2000) Broadway (2000 DVD release)
  • How the Grinch Stole Christmas (2000) Broadway (2001/2002 VHS & DVD releases)
  • The Road to El Dorado (2000) Broadway (2000 VHS & DVD releases)
  • BlooJ's Toonville: The First Case (2000)
    • Broadway (2001 VHS & DVD release/2010 DVD release)
    • Tex 2: Moo Can (2002 Director's Cut DVD Paramount Animation Collection (Disc 1 Full-Frame) release)
    • Cavalcade (2002 Director's Cut DVD Paramount Animation Collection (Disc 2 Widescreen) release)
    • Amazing Life (2010 Blu-ray release)
  • Rugrats in Paris: The Movie (2000) Broadway (2000 DVD release)
  • Shrek (2001)
    • Broadway (2001 VHS & DVD (Disc 1 Full-Frame) releases)
    • Tex 2: Moo Can (2001 DVD (Disc 2 Widescreen) release)
  • Lara Croft: Tomb Raider (2001) Cavalcade (2001 DVD release)
  • Jimmy Neutron: Boy Genius (2001) Tex 2: Moo Can (2002 VHS & DVD releases)
  • Spirit: Stallion of the Cimarron (2002) Broadway (2002 VHS & DVD release)
  • Star Trek X: Nemesis (2002)
    • Broadway (2003 VHS release)
    • Cavalcade (2003 DVD release)
  • Jonah: A VeggieTales Movie (2002) Tex (2003 DVD release)
  • The Wild Thornberrys Movie (2002) Broadway (2003 VHS & DVD releases)
  • Sinbad: Legend of the Seven Seas (2003)
    • Broadway (2003 VHS release)
    • Cavalcade (2003 DVD release)
  • Rugrats Go Wild! (2003) Broadway (2003 VHS & DVD release)
  • The Cat in the Hat (2003) Broadway (2004 VHS & DVD release)
  • Shrek 2 (2004) Broadway (2004 VHS & DVD release)
  • The Terminal (2004) Broadway (2004 DVD release)
  • The SpongeBob SquarePants Movie (2004)
    • Broadway (2005 VHS)
    • Tex 2: Moo Can (2005 DVD Paramount Animation Collection release)
  • Lemony Snicket's A Series of Unfortunate Events (2004) Cavalcade (2005 DVD releases)
  • War of the Worlds (2005) Cavalcade (2005 DVD release)
  • My Life as a Teenage Robot: Escape from Cluster Prime (2005)
    • Tex 2: Moo Can (2005 DVD release)
    • Amazing Life (2010 DVD and Blu-ray release)
  • Madagascar (2005) Tex (2005 DVD release)
  • Wallace & Gromit: The Curse of the Were-Rabbit (2005) The Science of Sensation (2006 DVD release)
  • Over The Hedge (2006) Tex (2006 DVD release)
  • Transformers (2007) Cavalcade (2007 DVD & Blue-ray release)
  • The Fairly OddParents Movie (2007) Tex (2007 DVD release)
  • Indiana Jones and the Kingdom of the Crystal Skull (2008)
    • Amazing Life (2008 DVD & Blu-ray releases)
    • Broadway (2012 Blu-ray re-release)

Universal Studios

  • TBA

20th Century Studios/Fox

  • TBA

Walt Disney Pictures

  • TBA

Sony Pictures

  • TBA

Warner Bros/New Line.

  • TBA

Misc

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List of films shown in THX Ultimate Cinema

TBA









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