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Series/Parallel or Parallel/Series?

Discussion in 'Amps and Cabs [BG]' started by Rafael, Oct 9, 2010.


  1. Rafael

    Rafael

    Feb 4, 2008
    Seattle
    Wiring a four driver cabinet....

    Advantages and disadvantages over wiring them
    series/parallel versus parallel/series? In other words,
    say you start with 8 ohm drivers:

    Two in series totaling 16 ohms, each pair in parallel, net 8 ohms

    Two in parallel totaling 4 ohms, each pair in series totaling 8 ohms.
     
  2. Rick Auricchio

    Rick Auricchio Registered Bass Offender

    The first: Series pairs, wired in parallel.

    Consider what happens if a voice coil opens. In the first case, the series pair cuts out, leaving you with a 16-ohm series pair.

    In the second case, an open coil leaves one speaker in series with the good pair. That remaining speaker can blow because the good 4-ohm pair can dissipate twice the power that a single speaker can.

    Otherwise, I don't see any difference.
     
  3. parsons

    parsons

    Feb 22, 2008
    Maryland
    wire it up and let 'er eat!
     
  4. In the scenario that Rick Auricchio describes, where one speaker fails (open voice coil):

    1) Series/Parallel
    - Cabinet nominal impedance: 16 Ohm
    - Qty. of driven speakers: 2
    - Power per speaker: 1/2

    2) Parallel/Series
    - Cabinet nominal impedance: 12 Ohm
    - Qty. of driven speakers: 3
    - Power per speaker: 2/3, 1/6, 1/6

    Perhaps a better approach, assuming your amp can drive 4 Ohm, would be to wire four 16 Ohm speaker in parallel. When one speaker fails open:
    - Cabinet nominal impedance: 5.33 Ohm
    - Qty. of driven speakers: 3
    - Power per speaker: 1/3
     
  5. get another head
     
  6. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
    Mar 8, 2021

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