Subwoofer Placement

Discussion in 'Home Theater Projects' started by richard_v, Jul 25, 2003.

  1. richard_v

    richard_v Stunt Coordinator

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    Is one large sub better than 2 smaller ones placed at opposite ends of a room? If 2 subs are perferred, is a front / back or side to side arrangement better.

    Rich
     
  2. Jason Monette

    Jason Monette Second Unit

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    It is my understanding that it is better to corner load the subs to prevent a dead spot. If i am wrong, I am sure someone will let me know.

    To answer your question. It depends on the sub.
     
  3. Neil Joseph

    Neil Joseph Lead Actor

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    This question is impossible to answer fully because of rooms all being different from each other. A front & rear plaement can work but it becomes more diffiicult exponentially as far as finding the correct/right placement to avoid nulls and peaks. I would personally prefer a single larger sub over 2 smaller subs not only for this reason, but for the fact that it can extend lower and not just play louder.
     
  4. Terry Montlick

    Terry Montlick Stunt Coordinator

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    Hi Rich,

    According to some recent research at Harman: two subs, placed at the center of the front and rear walls, are better than one placed anywhere. However two smaller subs do not necessarily equal one larger sub in audio power. [​IMG] It's probably better to have two large subs, because they will cancel each other at certain frequencies, making the response smoother, but reducing efficiency.

    Regards,
    Terry
     
  5. Wayne A. Pflughaupt

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  6. Terry Montlick

    Terry Montlick Stunt Coordinator

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    Hello Wayne,

     
  7. Jason Monette

    Jason Monette Second Unit

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    Play nice kids[​IMG]
     
  8. Wayne A. Pflughaupt

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  9. Terry Montlick

    Terry Montlick Stunt Coordinator

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    Hi Wayne,

    My comments are strictly on a friendly basis, and I don't mean for them to be argumentative for their own sake. [​IMG] I only want to get at the truth, and to make sure that people in this forum get the best available information.

    Just a correction on your interpretation of the citation. It reads:

     
  10. Wayne A. Pflughaupt

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    Hi Terry,

     
  11. Terry Montlick

    Terry Montlick Stunt Coordinator

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    Hi Wayne,

    Your point about widely varying room sizes is a good one. I checked the original AES paper, and Welti does not give the sizes of the other rooms he simulated - only the room ratios.

    My assumption is that they were roughly the same volume as the original room. I too would expect the his results would not apply for much larger rooms. I assume he is still talking about home theater-sized spaces.

    But since these are assumptions, I think I'll drop Todd an email to find out what dimensions he actually modeled. I'll report my findings on this thread.

    I think we're finally on the same "wavelength", Wayne. [​IMG] Overall, a very productive discussion, I think.

    Regards,
    Terry
     
  12. Terry Montlick

    Terry Montlick Stunt Coordinator

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    Wayne (and others who might be following this thread),

    I just heard back from Todd Welti on the subject of the various room dimensions he used. My assumption was correct. He kept the room volume fixed, while varying the room ratios. So his results are relevant for rooms of comparable size but different dimensions.

    Regards,
    Terry
     

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