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THX Classification (1 Viewer)

JamesCB

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Feb 20, 2003
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Could someone please explain the different classes of THX certification? I remember at first there was just "THX Certified", now there is THX Ultra, THX Ultra2, THX Select, I don't know if there are more. What is the difference in these? Are there differing levels of quality, different processing? What? Is this explained on the THX website?
 

Michael Reuben

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Michael Reuben
"Ultra" is essentially the original THX home theater spec.

"Select" is a watered-down version of the original spec. THX says it's geared to "smaller rooms". Detractors say it's a ploy designed to sell THX certification to manufacturers and products that wouldn't otherwise qualify. When "Select" was created, the original spec was renamed to "Ultra".

"Ultra 2" is a new version of the original spec. This article is a good introduction.

M.
 

Michael Reuben

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It's a useful link, but can you find an explanation of Ultra vs. Select there? I couldn't. I also couldn't find the Ultra 2 specs, which is why I referred to the Home Theater Mag. article.

M.
 

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