4 woofers walk into a bar...

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  • augerpro
    Super Senior Member
    • Aug 2006
    • 1871

    #1

    4 woofers walk into a bar...

    So I gotta question for you guys...say I were building a 3 way with 4 woofers. I've read that woofers in series can have an unforeseen impact on the bass alignment due to slightly varying TS parameters. If I were aiming for an 8 ohm nominal woofer section I can wire it two ways: a pair in series wired in parallel with the other series pair, or a parallel pair then wired in series with a following parallel pair? Which would you pick? Do you think there is any difference?
    ~Brandon 8O
    Please donate to my Waveguides for CNC and 3D Printing Project!!
    Please donate to my Monster Box Construction Methods Project!!
    DriverVault
    Soma Sonus
  • 5th element
    Supreme Being Moderator
    • Sep 2009
    • 1677

    #2
    Originally posted by augerpro
    So I gotta question for you guys...say I were building a 3 way with 4 woofers. I've read that woofers in series can have an unforeseen impact on the bass alignment due to slightly varying TS parameters. If I were aiming for an 8 ohm nominal woofer section I can wire it two ways: a pair in series wired in parallel with the other series pair, or a parallel pair then wired in series with a following parallel pair? Which would you pick? Do you think there is any difference?
    I would have thought that having 4 woofers together would perhaps help in smoothing out any spread in TS parameters?

    Going the route of two pairs wired in series, this would allow you to use separate filters to each pair if needed. This might be a good thing depending on how the drivers are positioned, relative to the midrange and the floor. You could end up with a 3.5 way.
    What you screamin' for, every five minutes there's a bomb or something. I'm leavin' Bzzzzzzz!
    5th Element, otherwise known as Matt.
    Now with website. www.5een.co.uk Still under construction.

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    • ThomasW
      Ultra Senior Member
      • Aug 2000
      • 10980

      #3
      Wire them in parallel pairs, then series the two pairs....

      IB subwoofer FAQ page


      "Complicated equipment and light reflectors and various other items of hardware are enough, to my mind, to prevent the birdie from coming out." ...... Henri Cartier-Bresson

      Comment

      • 5th element
        Supreme Being Moderator
        • Sep 2009
        • 1677

        #4
        Originally posted by ThomasW
        Wire them in parallel pairs, then series the two pairs....
        Would you mind explaining why? :T
        What you screamin' for, every five minutes there's a bomb or something. I'm leavin' Bzzzzzzz!
        5th Element, otherwise known as Matt.
        Now with website. www.5een.co.uk Still under construction.

        Comment

        • Dennis H
          Ultra Senior Member
          • Aug 2002
          • 3801

          #5
          In a PA setup, you'd do it Thomas's way so, if one speaker burns up, it's the only one that dies. If you do it the other way, two speakers die and you can't tell by listening which one is fried.

          Comment

          • numberoneoppa
            Senior Member
            • Sep 2009
            • 535

            #6
            Originally posted by 5th element
            Would you mind explaining why? :T
            From an impedance standpoint alone, it would simplify things. (z*2/2=z)
            -Josh

            That feeling when things are finally going right. Yeah, that one.

            Comment

            • augerpro
              Super Senior Member
              • Aug 2006
              • 1871

              #7
              Thanks for the input guys, I'll take it into consideration.
              ~Brandon 8O
              Please donate to my Waveguides for CNC and 3D Printing Project!!
              Please donate to my Monster Box Construction Methods Project!!
              DriverVault
              Soma Sonus

              Comment

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