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i'll apologise first! ohms confusion

Discussion in 'Amps and Cabs [BG]' started by elbasst@rdo, May 2, 2010.

  1. elbasst@rdo


    May 2, 2010
    i have a 4 ohm minimum rated head and two 4 ohm cabs am i right in thinking if i connect each cab to a different output on the amp (is this parallel?) it will give me a 2 ohm load? but if i connect the two cabs together with a lead and then connect them to one output on the amp (series?) itll give me an 8 ohm load?

    im more than confused about this

  2. Wrong..............

    Both ways of connecting the cabs are parallel, and will result in a 2 ohm load.

    To connect your cabs in series, you need a specially made cable.
  3. nobodysfool


    Apr 22, 2010
    Shelby, OH
    If you connect 2 - 4 ohm cabinets together daisy chain style, you will still get a 2 ohm load. the only way you could use 2 cabinets together like that would be to wire them internally in series.

    You didn't say what cabinets they are, or what they're loaded with. Let's assume you have 2 - 2x10's, at 4 ohms for each cabinet. They probably have 2 - 8 ohm speakers wired in parallel which would give you 4 ohms. If you wire them in series, the cabinet would be 16 ohms, and two cabinets wired that way, and daisy chained to an amp, would be an 8 ohm load, total. If you want a 4 ohm load to the amp, it's going to be 1 speaker cabinet of what you have now, or get 2 - 8 ohm cabinets, which daisy chained together will give a 4 ohm load.
  4. Exploiter8

    Exploiter8 Demons run when a good man goes to war

    Jan 18, 2010
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  5. nobodysfool


    Apr 22, 2010
    Shelby, OH
  6. elbasst@rdo


    May 2, 2010
  7. That is pretty much it............

    What you also need to realize though is that if one of your cabs goes down (stops working), they will BOTH stop working.
  8. Not dangerous to a SS amp, but could be very serious with a tube amp (just for reference). :)
  9. There is also the thought that is the cabinets are not identical there could be some interaction between the crossovers.

  10. BOTH excellent points, and exactly why running cabs in series is not the "norm". It should only be done when using matching cabs, and with an amp that does not require a continuous load (most tube amps).

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