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full range selection

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Joe Murphy Jr

In Reply to: Okay, I have a THX-certified DTS disk and full-range (non-dipole) center and surrounds... posted by oscar on November 13, 2005 at 20:31:04:

The frequencies going to the center/rear channels is up to you. You need to tell your processor that you have full range for that/those particular channel/channels (the choice is usually large or small in the speaker size mode). This is true for all DTS, Dolby Digital and Dolby Pro-Logic II processing. Dolby Surround, Dolby Pro-Logic and many (but not all) of the generic effects processing formats intentionally limit the bandwidth to the center and/or rear channels.
On some processors, when you choose small speakers, you can pick the high pass frequency (the low frequency cut-off), but many processors default or even lock you into 80Hz. You need to check the manual for your processor. Obviously, when you select large speaker/speakers, you are basically saying that full bandwidth signals are OK (ie; Bring it on!).

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Actually the question was whether the source would offer any content below 80 Hz - oscar 20:11:41 11/22/05 (1)
on a THX-certified soundtrack given Lucas disbelief in full-range information to the rear speakers. If the rears were band-width limited to meet to THX requirement, than I may be better off selecting a surround mode which doesn't conform to THX ?????
- that's incorrect - Joe Murphy Jr 14:05:12 11/24/05 (0)
  Where'd you get that information? No, wait! Don't tell me -- just stop using that source for information as it's wrong. Unfortunately, I'm not going to explain what THX certification does mean due to the fact that it would be full of mucho deserved sarcasm to the max (aimed at THX, not you) and I don't feel like typing for a few hours.
  Fact 1: THX certification does not mean bandwidth limited and George Lucas does not bandwidth limit his soundtracks -- in any channel(s) * .
  Fact 2: Bandwidth limiting is done, if so desired by the user, in the surround receiver/processor -- not in the recording.
  * LFE/.1 excepted

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