Psst... Ready to join TalkBass and start posting, make new friends, sell your gear, and more?  Register your free account in 30 seconds.

Ohm question

Discussion in 'Amps and Cabs [BG]' started by millner, Dec 3, 2005.


  1. millner

    millner

    Sep 26, 2005
    I was wondering about this at work today and was curious if somebody could answer this for me...

    What would/wouldn't happen if I ran a 4ohm cab and an 8ohm cab at the same time? Would the 4ohm run at 4 and the 8 run at 8? Would they each run at 8 (and could this put the 4ohm cabs at risk)? Would they each run at 4 and possible damage the 8ohm cab?

    This may be a commonly known fact but I just can't say I know the answer. Any input would be appreciated!
     
  2. tadawson

    tadawson

    Aug 24, 2005
    Lewisville, TX
    Cabinets don't "run at" a given ohmage, they are BUILT to a specific ohmage, and stay that way for life, at least unless you blow them up. . . .

    As such, a 4 and an 8 together will give your amp a load of 2.6 ohms, which will be bad if it has a 4 ohm minimum. The 4 ohm cabinet will also get 2/3 of the power of the pair.

    - Tim
     
  3. billfitzmaurice

    billfitzmaurice Commercial User

    Sep 15, 2004
    New Hampshire
    Owner, Bill Fitzmaurice Loudspeaker Design
    Impedance.
     
  4. petch

    petch Supporting Member

    Mar 25, 2001
    Medina, Ohio
    Thank you! "Ohm" should be preceded by a number.