Wiring 4 8ohm speakers at 16 ohms

Discussion in 'Cabinets & Speakers' started by abbiehuxley, May 4, 2008.

  1. abbiehuxley

    abbiehuxley New Member

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    Is it possible to take 4, 200 watt EVM 12L's (which are all rated at 8ohms) and wire them in a 4x12 cab so that the total load is 16 ohms? Any info much appreciated...
     
  2. Adwex

    Adwex New Member

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    I'm not sure.
    No way, no how.

    Choices are:

    all 4 in parallel = 2 ohms
    series/parallel pairs = 8 ohms
    all 4 in series = 32 ohms
    3 in parallel, in series with the 4th = 10.66 ohms
    3 in series, in parallel with the 4th = 6 ohms

    To get 16, you'll have to either add speakers, remove speakers, or get 4 16 ohm speakers.

    Another option is to get a HotPlate and use it as a dummy speaker load in series with your 8 ohm cab, but you'd be better off just getting more, or less, or different speakers.
     
  3. ZoomZilla

    ZoomZilla New Member

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    Why do you want to increase the ohms?
     
  4. abbiehuxley

    abbiehuxley New Member

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    I just think amps sound better running at 16 ohms so I was hoping I could find a way to run the cab at 16 ohms. Guess not...
     
  5. ZoomZilla

    ZoomZilla New Member

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    I guess we are the opposite. I rewired mine FROM 16 to 4 Ohms. I think the lower resistance allows more power into the speaker so it sounded better to me.
     
  6. Adwex

    Adwex New Member

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    A long time ago, I tried comparing running at 4 and 16 to see any difference. I didn't hear any. It's certainly not worth doing what you would have to do.
     
  7. ZoomZilla

    ZoomZilla New Member

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    I may change mine back to see if the difference I heard was due to speaker wire upgrade, or ohm droppage. It's not like it's difficult to do! I just have to desolder all of my connections, but once the iron is hot, that takes a few seconds per connection.
     
  8. abbiehuxley

    abbiehuxley New Member

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    Ok... so a 4x12 cabinet with 4, 8ohm EVM 12L's would have to be in series/parallel pairs to run at 8 ohms? Man, I'm terrible at this... Thanks!
     
  9. Adwex

    Adwex New Member

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    Correct.

    Just checking....Do you know what "series/parallel pairs" means?
     
  10. ZoomZilla

    ZoomZilla New Member

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    Yes, it would have to be in series/parallel. What that basically means is that your left and right set of speakers are wired together in parallel. That means that if you have 8 ohms speakers, the left and right speakers are wired to 4 ohms, then the two sides are joined (series) and you add up both sides to get the total. So your 8 ohms comes from wiring up 2 SETS of speakers wired to 4 ohms. In other words, you could get a jack plate for the back and do a ton of different configurations. You could have a 2 ohm in put, a 8 ohm input and 2 stereo 4 ohm inputs, however hardly any amps have 2 ohm outputs, so that would make that input worthless. But you could use the others!
     
  11. 5er driver

    5er driver New Member

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  12. Crookshanks

    Crookshanks New Member

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    Need a the definite ramifications. 50 watt tube wired into two 8 ohm Celestions in a parallel circuit bringing it down to 4 ohms per speaker and 25 watts per speaker. Good or bad? Then single speaker MG50DFX 8 ohms connected to the two eight ohm speakers. Adviseable?
     
  13. Slimjim

    Slimjim New Member

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    here is a video on how to do it, so i guess it can be done..
    I have a cab with 4 - 8 ohm speakers run in parallel / series, and for some reason the output jack is reading 13 ohms.. go figure.

    https://www.youtube.com/watch?v=kQ6_uYAb_CM

    This is how mine is wired up.

    [​IMG]
     
  14. ampmadscientist

    ampmadscientist Well-Known Member

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    No it does not allow more power, but it might sound differently.

    16 ohm speaker, amp set 16...
    is same exact power as
    4 ohm speaker, amp set on 4 ohms.

    no power increase.


    4X EVM wired 8 ohms, amp set 8 ohms, will be just fine.
    again, the same power as
    16 ohm speaker, amp set 16 ohms.

    EVM speaker sounds quite nice! My favorite speakers.
     
  15. Georgiatec

    Georgiatec Well-Known Member VIP Member

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    13-14 would be a normal reading for four 16 ohm speakers wired series / parallel...my guess would be your speakers are 16 ohms. Disconnect one and check across the terminals. :yesway:
     
  16. chuckharmonjr

    chuckharmonjr Well-Known Member

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    I concur completely with Tony....gotta be 16 ohm speakers...Ohm's law don't lie
     

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