Which sound is better? THX or IMAX?

Question

Which sound is better? THX or IMAX?

Answer 1

Neither is a sound per se. THX is a set of standards that theatres or various types of hardware must meet to be certified. These standards include specifications for where speakers should be located, reverberation time, screen placement, acoustic isolation, a baffle wall, etc.

IMAX is a large format film presented with digital surround (which because of screen and overall theatre design does not meet THX standards, but presents an alternative).  

Admittedly sound is a big part of both experiences ... but there isn't a specific IMAX or THX sound.

Which sounds better is difficult to define ... they are both excellent.

Answer 2

THX is the trade name of a high-fidelity sound reproduction standard for movie theaters, screening rooms, home theaters, computer speakers, gaming consoles, and car audio systems. THX stands for Tomlinson Holman's eXperiment. THX was developed by Tomlinson Holman at George Lucas's company Lucasfilm in 1982 to ensure that the soundtrack for the third Star Wars film, Return of the Jedi, would be accurately reproduced in the best venues.

The THX system is not a recording technology, and it does not specify a sound recording format: all sound formats, whether digital (Dolby Digital, SDDS) or analog (Dolby SR, 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, no parallel walls (to reduce standing waves), a perforated screen (to allow center  This is word for word (courtsey of Yahoo Wickpedia) on the purpose of THX, I have a receiver that carries the THX Logo and the sound is off the charts on the other hand IMAX or Image Maximum specialized mostly in Digital 3D imaging bringing your film to life [by using special effect cameras and 360degree screen[s] along with these multi-lens cameras; as if you were actually part of the picture its self.  So there you have it there is no comparison, just a different two worlds.