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Originally posted by The Hun:
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My understanding is that the 120 Hz low pass is also applied to the LFE channel from DD/DTS/etc sources as well. Entirely different from the low pass to the sub for the center, mains, and rears/surrounds.
Correct, this takes place in the decoding stages along with the 10db LFE boost.Some soundtrack however already "filtered" before encoding,and DTS at half bitrate start to roll off at 90hz.


Sorry, but...incorrect.

The 120 Hz. LFE LP filter is only used when in 'Dolby Configuration 0'. This is all sats set to 'large' and sub to 'yes'.

All other configurations (which include any speaker(s) set to 'small') cause the direct LFE path to be disabled. The bass signals are then sent to a summing module and then to the LP filter of the selected X-over.

So, to answer the original question, yes, if you set the X-over to 40 Hz., you will lose 1.5 octaves of the LFE...assuming you feed 1 sub through the SW output of your 950.

As far as having no benefit in purchasing the 100's, this is not-to-worry. If a X-over point of 80 Hz. is selected, then the mains should have flat response to 1/2 to 1 octave below that point (60-40 Hz.). On the other side, if the sub is LP filtered at 80 Hz., it should have response capability to 120 Hz., thus fairly preserving the LFE signal at the same time.
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