THX is an American audio 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, and car audio systems, and video games as well.
The current THX was created in 2002 when it spun off from Lucasfilm Ltd. THX was developed by Tomlinson Holman at George Lucas' 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" 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.")
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.
In 2016, THX was acquired by videogame hardware company Razer Inc., with Razer now owning all of THX and its intellectual property.

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  1. S

    Matching Arendal 1723 thx with Polk reserve range?

    Hi all. I have an all Polk reserve 5.4.2 set up (r600 towers, r300 centre, r900 front heights and some rear height ceilings. Want to swap out the r300 centre as it’s just not good enough for me as a centre. I’m finding the larger r400 impossible to get in the UK. Apparently Polk are...
  2. Nayfne

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    Just a question really... does anyone have a valuation they would put on the above speakers if they were to be sold? The Left and Right speakers also come with the dedicated stands. Tia.
  3. G

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    As above looking for a fully working Kef TDM 45B THX SUB Kind Regards
  4. tonyjba

    M&K new 750 THX or 950 THX from 2020?

    Hey hoping for some more guidance. I have an option on the latest front end of three 750THX or three slightly older (2020) 950THX. Knowing how tech trickles down I wonder if the 750s are the right bet now or do these perform differently. Are 950s more refined with music or have more punch? As...
  5. tonyjba

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    Hi all...I am an M&K novice, having built systems for both music and movies historically. I am looking at used M&K and am a little bemused by the range and trying to decipher what models fit where and before or after the business being taken up in Europe. So are M7s the same as the M7 THX (I...
  6. FattMatt

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  7. A

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    Good Morning, Im after a bit off advise on which av receiver to go for ie Denon, Pioneer, Onkyo ? Would I need to go for a THX certified receiver? My current set up is 3 x kef ci4100ql-thx for LCR and 2 x ci200rs-thx for my rears these are mounted in the ceiling. My room size is 5m x 4m and my...
  8. C

    Which Subwoofer up to £600 to accompany M&K LCR750 THX?

    Sub novice here I'm setting up M&K LCR750 THX and the accompanying sub (V10+) is £1200 which is currently out of budget I've seen many glowing recommendations for the likes of BK, Monolith, SVS, Arendal etc I'm looking for something 10-12 inch size max The room is about 4m by 4m with wooden...
  9. TheFridge

    Monoprice thx question

    Hey folks, I'm thinking to upgrade to the monoprice thx for my front stage from the monitor audio b2 bronze and centre. The question is if I was to end up having a projector with an AT screen would these speakers do the job behind the screen as this is the plan eventually. Thanks in advance
  10. N

    Cambridge Soundworks MegaWorks THX 250D takes ages to start working

    I am not sure in which forum this should be in, if it is in the wrong place maybe a moderator can move it for me. It is about a speaker set for my PC that I am having trouble with. For reference it is this set Creative MegaWorks 250D-THX review: Creative MegaWorks 250D-THX I can't remember...
  11. P

    Monolith M-OW1 THX Compact Certified On Wall Speakers Owner's Thread

    Starting an Owner's thread for these as i think they could become quite popular for small rooms due to them being THX Compact Certified. Which means they are suitable for rooms with up to an 8 Foot viewing distance and up to 1000 Cubic Feet in size. And designed to use an 80HZ Crossover. With...
  12. sm1ggsy

    monitor audio silver c150 to a monoprice THX-365C THX Certified Ultra Center

    As the title , i know I will be breaking the timber matching as I have monitor audio silver fronts but I can’t afford a c350 - c250 , but that thx monoprice 365 centre looks like a bargain at £215 it’s nearly a free upgrade if I sell the silver c150 6 gen which I know is the 2 and half way...
  13. Ian Collen

    NEWS: Perlisten unveils THX Dominus certified S-Series in-wall speakers

    Led by the flagship S7i-LR, the new S-Series and R-Series models also come with the company’s patent-pending Directivity Pattern Control waveguide technology. Read the news.
  14. P

    Monolith M-OW3 THX Compact Certified Passive Soundbar

    Anyone got one of these? Monolith M-OW3 THX Certified LCR/Soundbar On Wall Speaker It's rated for rooms up to 1000 cubic ft and up to an 8ft veiwing distance, so rooms on the smaller side.
  15. 1

    Rupert Neve RNHP versus SMSL SP200 THX AAA-888

    I have had the SMSL amp for sometime and it performs really well. Is the Rupert Neve amp a worthwhile upgrade? Will i notice the difference. I have balanced connections from my source and use the Beyerdynamic DT1990 Pro headphones. Thanks
  16. icemanonline

    Waste of money local to me, Thx Nicola Sturgeon ya wee.......

    Ok.... So, local to me is Edinburgh in general. And Leith is closest. This is the mess still under construction for the extension to the Edinburgh Trams.... Over budget and not wanted...... The first part of construction seen lots of businesses going out of business after part 1. Then the...
  17. G

    Monolith V2 10in THX vs SVS PB-1000 Pro

    Hi, I'm new to contributing on this forum but have spent many hours consuming :). I'd like some help/advise/recommendations on whether the Monolith V2 10in THX or the SVS PB-1000 Pro is the "better" sub woofer. My room size is 5 x 3 meters and I enjoy to 50/50 music and movies. I really want...
  18. Ian Collen

    NEWS: Razer teams up with THX for Barracuda Pro headset

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  19. B

    Thoughts on Klipsch THX Ultra2 in 2022

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  20. xonize

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