THX
THX Ltd. is an American company founded in 1983 by George Lucas and headquartered in San Francisco, California. 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. THX Ltd. is a subsidiary of Razer Inc..

The current THX was created on June 12, 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 "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 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").

In 2002, THX was owned by sound card manufacturer Creative Technology Limited, which held a 60% share of the company. The company has had a long history with Creative, which was responsible for the creation of the first THX-certified audio card for computers, the Sound Blaster Audigy 2, and the Deep Note.

In 2016, THX was acquired by videogame hardware company Razer Inc., with Razer owning all of THX and its intellectual property.
Q38222
George Lucas
PER
Q62
San Francisco, California
LOC
Q26674
high fidelity
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Q41253
movie theater
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Q864121
home theaters
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Q1209975
computer speaker
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Q8076
gaming consoles
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Q7889
video games
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Q367412
Razer Inc.
ORG
Q1186164
spun off
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Q242446
Lucasfilm Ltd.
ORG
Q917218
Tomlinson Holman
PER
Q38222
George Lucas
PER
Q217199
soundtrack
Concept
Q462
Star Wars
ORG
Q181803
Return of the Jedi
MEDIA
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crossover
Concept
Q783365
THX 1138
MEDIA
Q471744
glissando
Concept
Q6128203
James A. Moorer
PER
Q15149927
Deep Note
ORG
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recording technology
Concept
Q622624
Dolby Digital
MEDIA
Q44299010
DTS
ORG
Q1412237
SDDS
MEDIA
Q917075
Dolby Stereo
MISC
Q1710914
Ultra Stereo
ORG
Q836575
quality assurance
Concept
Q17085328
mixed
Concept
Q1455645
crossover
Concept
Q2585153
floating floor
UNK
Q7564743
baffled
Concept
Q589260
acoustically treated
Concept
Q123300
standing wave
Concept
Q5059454
center channel
UNK
Q4343
sound card
MISC
Q477016
Creative Technology Limited
ORG
Q7564662
Sound Blaster Audigy 2
MEDIA
Q15149927
Deep Note
ORG
Q367412
Razer Inc.
ORG
Q1044630
THX
ORG
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1983-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1983
DATE
2002-06-12T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
June 12, 2002
DATE
1983-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1983
DATE
1138-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1138
DATE
2002-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2002
DATE
2016-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2016
DATE
+30^^http://www.w3.org/2001/XMLSchema#decimal
30
NUMBER
+60^^http://www.w3.org/2001/XMLSchema#decimal
60
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
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