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With cabinet extension jack, can I run two 4 ohm cabs on a 4 ohm-minimum head?

Discussion in 'Amps and Cabs [BG]' started by Lorenzini, Jul 22, 2007.


  1. Lorenzini

    Lorenzini

    Dec 31, 2004
    Los Angeles
    That's the question.
    I have a GK 1001rb-II. Doesn't run at 2 ohms - 4 ohms is the minimum.


    But my Carvin RL210 has an extension jack. Does that mean I can somehow run my RL115 and RL210 in series?


    I don't know a ton about this so any help is appreciated.

    Thanks!
     
  2. No I don't think so.....2 x 4 ohm cabs usually = 2 ohms which = fried amp.
     
  3. bongomania

    bongomania Gold Supporting Member Commercial User

    Oct 17, 2005
    PDX, OR
    owner, OVNIFX and OVNILabs
    Battered and fried.
     
  4. Lorenzini

    Lorenzini

    Dec 31, 2004
    Los Angeles
    So then what the heck does the Extension jack do?
     
  5. bongomania

    bongomania Gold Supporting Member Commercial User

    Oct 17, 2005
    PDX, OR
    owner, OVNIFX and OVNILabs
    Well, some amps are capable of running at 2 ohms.
     
  6. Lorenzini

    Lorenzini

    Dec 31, 2004
    Los Angeles
    ...but what, some of those amps don't have 2 1/4" jack outputs?

    Oh well! Thought I'd try :)
     
  7. Blues Cat

    Blues Cat Payson Fanned Bass Strings Owner Commercial User

    May 28, 2005
    Katy, Tx
    Payson Fanned Bass Strings Owner
    No.
     
  8. vtwo

    vtwo

    Dec 16, 2006
    Connecticut
    I was confused by this too. Crossovers in cabinets are wired in PARALLEL. So however you wire your rig - whether both cabs are wired to the head or if they are daisy-chained - the resulting impedance will be the same.

    Two 4ohm cabs = 2ohms
    Two 8ohm cabs = 4ohms

    Anyone with more knowledge, feel free to correct me if I'm mistaken.
     
  9. 62bass

    62bass

    Apr 3, 2005
    I think the Redline amp is capable of running at a minimum of 2 ohms and that is the impedance at which it achieves its maximum output power. Many of Carvin't amps are this way. So you can run two 4 ohm cabinets in parallel for a resulting impedance of 2 ohms. Most other amps are designed to produce their maximum safe output a 4 ohms. The GK is. Usually there will be a notice printed near the speaker output jack telling you the safe minimum impedance, or it will be in the owner's manual.
     

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