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  • Positioning loudspeakers and room modes

    Having just received my speakers after a long stay at the Stroud spa, I've been fiddling with their position. I have fundamental modes at 28Hz (l= 6.06); 32Hz (w=5.24); and most notably at 73Hz (h=2.34).

    There's not a lot I can do about the 28 & 32 modes, and they are not intrusive. I watched Ben Lilly's"Funkyjunk" acoustics video (recommended) and realised that I could harness quarter-wave LF cancellation (caused by out-of-phase rear wall reflections) to try to cancel or at least mitigate the mode at 73Hz. Placing the speaker baffles half a ceiling height from the rear wall (1.17m in my case) has worked wonders.

    This formula should work with any cone loudspeaker in any rectangular room.

    Have a try, and see what you think.

    This is worth watching from the start:

    https://www.youtube.com/watch?v=CdGTnXNMDZI

  • #2
    For me this would be to near. I came to a good sound without booming effects with the method from Cardas like this instruction.
    https://www.acoustic.ua/recommendations/800
    Best regards RĂ¼diger

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    • #3
      Originally posted by fr.jazbec View Post
      For me this would be to near. I came to a good sound without booming effects with the method from Cardas like this instruction.
      https://www.acoustic.ua/recommendations/800
      Best regards RĂ¼diger
      That's interesting, but the calculator takes no account of the ceiling height, so it's not very useful if you are trying to cancel the vertical dimension room mode using quarter-wave LF cancellation.

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