what is THX


New member
Aug 10, 2019
When i bought my copy of what hi-fi s&v last month the first thing i did was throw away the pair of 3D gasses from the front cover. A day or two later i read inside that they were perhaps a little more useful.My question is what is THX ?and is it worth buying equipment with THX in it ? ...."This is all TOO MUCH for my old head "


Well-known member
Nov 20, 2008
THX is basically a set of standards devised for George Lucas, originally to improve the sound in cinemas. THX amplifiers, for example, process the sound to make the treble less harsh, plus lots of other 'tweaks'.

The glasses are for use with the THX Optimiser, which is a series of test sounds/images to set your television up 'correctly'. Specifically, they are used with a colour test.

The THX Optimiser can be found on Lucasfilm DVDs, and, I think, Pixar (it's usually in one of the extras or setup menus, and I found it easy to miss as it appeared to just be a logo!).

To get the full benefit of THX modes on an amplifier with a THX logo on it, you would really need to buy a set of THX-certified speakers (which aren't that cheap). THX used to recommend (I assume they still do) that you only switch on THX processing with movie soundtracks. THX speakers are good for THX, but maybe not so good all rounders, with 'ordinary' surround sound, or plain stereo.

The THX logo means that the equipment (and some DVDs etc) meets THX's strict standards - it doesn't necessarily mean the equipment is better than non-THX (although it should be pretty good).


Clare Newsome

New member
Jun 4, 2007
More on how to use the THX glasses here

And if you want another pair, we've got a special offer on here - or there may be some Tesco stores that have a few copies of our November issue - with the free glasses - still in stock!

We'll also have some extra THX glasses at this weekend's Manchester Show, which we'll be giving away (while stocks last) when people buy the new Awards issue or Ultimate Guide to Blu-ray


Thanks Electroman.!! and the lovely Clare Newsome with yet another plug for the Manchester show, I am unable to attend i`m affraid,



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