Benefit of dedicated center speaker

fyrn
fyrn Posts: 146
In a HT setup with a large screen (over100") would it be more beneficial to run and extra set of the same L/R speaker rather than the center version speaker for said models. My though would be a larger dispersion of the center channel rather than coming from a single smaller point. Any cons to doing this?

Comments

  • BlueFox
    BlueFox Posts: 15,251
    How would you setup another pair of speakers to run off the center channel output?

    That does seem like a good idea though. I guess you could also get a huge center and achieve the same result.
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  • fyrn
    fyrn Posts: 146
    Couple of ways.
    1. just wired them in series/parallel depending on the ohms
    2. you could Y split the output to a 2ch amp.
  • westmassguy
    westmassguy Posts: 6,850
    edited November 2014
    The main purpose of a center channel speaker is to lock the dialog on screen, with a single point source. A center that has a wide dispersion dome tweeter, and two or more woofers in an MTM arrangement does this. Larger centers will have multiple woofers, MMTMM, and will provide a wider point source. Two separate centers will not be a point source, even though they're receiving the same signal. If you're sitting dead center, it will most likely sound OK. As soon as you move off the centerline however, you'll be hearing one more than the other. The other signal will reach your ears slightly delayed. This may sound odd, and smear the image. Depending on your room acoustics, and how far apart they are, you could experience comb filtering, even a slight echo.
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  • mantis
    mantis Posts: 17,201
    You need to go to Dobly labs and DTS websites to learn about Home theater and why each speaker is spec'd into a system. Then you will know why you should have a center channel speaker in your system that matches perfectly with the rest of your theater speaker package.

    In very short ,
    Each speaker in a home theater setup has a job to do. In the from you have a left , center and right channel. Each of these speakers need to match each other perfectly so when your watching a movie and lets say a truck drives from left to right of the screen , the sound doesn't change. In most movies something of this effect happens and you need not hear differences as you would get distracted by the differences and not be involved in what your watching. The audio system is designed to lock you into the movie and make it more realistic. Give you a sense of movement if you will.
    The Surround speakers also need to match perfectly for the same reasons. If something moves from front to back, the sound needs to stay the same . What sucks is that most speakers from different companies sound different. Why? Great question , IMO they all sound sound the same as they are replaying the sound not used to creat the sound.
    In The pro side , YES they all sound sound different as they are tools to create music and sounds. So as an artist you select your tools that are going to produce what you are trying to create.
    In the Home world , speakers job is to replay exactly what was created not recreate what was already created. I find that disturbing but it is what it is.
    So when your building a home theater system, it is ideal to use the correct speaker for the correct job from the same company.
    Dan
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  • fyrn
    fyrn Posts: 146
    All the points being raised, makes this seem a bad idea. A larger center would be better but now your talking different brand and mismatch timber.
  • F1nut
    F1nut Posts: 50,734
    What L/C/R are you using now?
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  • BlueFox
    BlueFox Posts: 15,251
    fyrn wrote: »
    All the points being raised, makes this seem a bad idea. A larger center would be better but now your talking different brand and mismatch timber.


    I wouldn't worry too much about that. My L/R fronts are Aerial Acoustics 7T, and the center is a PSB Synchrony One center, and I have no problems. 99% of audio comes from the center, and very little dialogue comes from any of the other speakers. I have to notice anything that makes me want to buy an Aerial center.
    Lumin X1 file player, Westminster Labs interconnect cable
    Sony XA-5400ES SACD; Pass XP-22 pre; X600.5 amps
    Magico S5 MKII Mcast Rose speakers; SPOD spikes

    Shunyata Triton v3/Typhon QR on source, Denali 2000 (2) on amps
    Shunyata Sigma XLR analog ICs, Sigma speaker cables
    Shunyata Sigma HC (2), Sigma Analog, Sigma Digital, Z Anaconda (3) power cables

    Mapleshade Samson V.3 four shelf solid maple rack, Micropoint brass footers
    Three 20 amp circuits.
  • fyrn
    fyrn Posts: 146
    F1nut wrote: »
    What L/C/R are you using now?

    currently LSI7 for L/R with a LSIc.
    I was thinking about LSI9's for L/R and putting the 7's in center duty
  • txcoastal1
    txcoastal1 Posts: 13,318
    fyrn wrote: »
    F1nut wrote: »
    What L/C/R are you using now?

    currently LSI7 for L/R with a LSIc.
    I was thinking about LSI9's for L/R and putting the 7's in center duty

    That would work fine with a Y-Cable or a dual center AVR output

    DK, I believe runs a apir LSi9's on there side as center channels
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  • fyrn
    fyrn Posts: 146
    tweeters up i"m assuming
  • fyrn
    fyrn Posts: 146
    Would there be a disadvantage with the impedance , once rewired the lsi7's would be 8 ohm