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Just when I thought the placement of rear left/right and surround left/right was pretty much decided on and accepted as being the 'standard' configuration as demonstrated on Dolby's own website, I now find that THX recomended both rear surrounds should be "as close together as possible" (surely one speaker is theoretically better than two if this is the case?)
If this configuration is only recommended for THX then what are they playing at?
Do the imagine that people will use their configuration at the expense of DTS, SACD and DVD-A replay?
Ridiculous.
My current processor defaults to THX whenever possible so I'll just have to change the settings and the much vaunted THX Ultra 2 capability will be redundant.
Cheers George!
Best Regards,
Chris redmond.
Follow Ups:
In a THX receiver it should ask whether your rears are close or far apart. My Marantz SR8002thx does. I have my rears at about 72" in between on a 14' wall. However I don't use THX much, I use native with the EX/ES enabled or PLIIx for non Dolby TV with the rears. I have used nothing but 7.1 since the early Denon receivers.
Trust me on this, ask good questions in this hobby and listen or you may find yourself wasting a lot of time and money. On my first Sony receiver in the early 90's I re-calibrated it every day it seemed and moved speakers to the point my wife hated home theater. I had two sets of "sided", one in the sides and ones in the rear, sides for movies and rear for multi channel music. I found multi channel to be a disappointment except for Harmonia Mundi SACD on classical.
I have a nice home theater but I still prefer hifi for music.
"(surely one speaker is theoretically better than two if this is the case?)"
From a 5.1 setup, the next step is a 7.1 configuration. A 6.1 speaker setup, not to be confused with a 6.1 recording, is never a recommended setup. What can happen is what's called front-back reversal , a situation in which the brain gets confused and perceives sound coming from directly behind the listener to appear to come from the front. That is why this type of speaker setup should have never been used in consumer electronics.
To answer your question, I would put the two rear surrounds at the 1/3 points on the rear wall.
Hungry for more? Here's a link to the dts site and their numerous options for multi-speaker setups (the 7.1 Standard is the only one I would use):
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