Setting center channel to "LARGE"

Discussion in 'Speakers' started by PhillipC, Mar 28, 2003.

  1. PhillipC

    PhillipC Stunt Coordinator

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    Just wondering what everyone has their center channel set to? Would this be a good idea? I have Paradigm reference speakers all around and my Studio 100's are set to large only. I am running without a sub
     
  2. Bob McElfresh

    Bob McElfresh Producer

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    Look at how people with multiple subs are advised to position them: in the same corner/location.

    Setting more speakers to LARGE creates the same problem as having multiple subs in different locations: complex peaks in the room.

    It also draws more power from your receiver/amp to drive that woofer.

    But.. try it. It cannot hurt to do the experiment.
     
  3. Marc H

    Marc H Second Unit

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    If the center speaker has the range, try large for sure. Why introduce another filter into the dialog if you don't have to?
     
  4. Jon G.

    Jon G. Stunt Coordinator

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    Paradigm Reference Studio CC definately does NOT have the range to be set to large. I have the same center and have measured it's output and find it drops at least -3 dbs around 70Hz, your room may vary...

    I have mine crossed over at 70Hz.
     
  5. Edward J M

    Edward J M Cinematographer

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    If the PRS CC is -3 dB at 70, I would not filter at 70 - this will create a dip in the FR at that point. 80 Hz would be a much better choice.

    A rule of thumb is to filter a half octave above the -3 dB point, so the speaker does not start to naturally roll-off while also being filtered, thus creating a dip in the FR.

    These high pass filters are not brick walls - they are usually 12 dB/octave or 18 dB/octave, so the speaker will be asked to play well below the filter point.

    Some DVD's have full range, full power signals in all channels, including the center. I've never seen a center channel with an F3 of much less than 50 Hz - they almost have to be high passed in order not to lose the bass in that channel.

    Regards,

    Ed
     
  6. Camp

    Camp Cinematographer

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    I used to run my DefTech CLR-2000 in Large. I figured it could take it so why not? I never really gave it another thought untill I was bored one day and experimented with it.

    It sounded much better for movies when set to small. Music wasn't all that different but movies & general TV watching was better in Small.
     
  7. Wayne A. Pflughaupt

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  8. Jon G.

    Jon G. Stunt Coordinator

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    yeah, I meant I filtered my PRS CC at 80Hz, brain fart there...
     
  9. Justin Ward

    Justin Ward Supporting Actor

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    Another consideration. Isn't it true that some soundtracks have no LFE track. If this is so, all the bass is in the 5 discrete channels and if they are large, you are effectively "wasting" your subwoofer.
     
  10. Scot Pritchard

    Scot Pritchard Stunt Coordinator

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    what about a b&w htm1 center could i set this to large?
     
  11. Bob McElfresh

    Bob McElfresh Producer

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  12. Ricky T

    Ricky T Supporting Actor

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    If a speaker can't do an honest 45-50hz (at ~90-100dB), I wouldn't set it as Large....you would lose the information that the speaker cannot reproduce.
     
  13. MarkO

    MarkO Second Unit

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  14. Wayne A. Pflughaupt

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    Mark,

    Yes, this can certainly be a factor.

    I have an AudioControl RTA connected line-level to my system giving a real-time, full-range reading of the program’s frequency response. Anytime I hear it, the RTA display verifies the source of it is the program – a no-brainer when you see a voice give a severe “haystack” curve that peaks as low as 60Hz.

    But I'm with you - in either case (placement or program content) setting the center to small gets the best results. Setting it to large will only aggravate the problem.

    Regards,
    Wayne A. Pflughaupt
     

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