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Need Help Identifing ohms in Mesa 215 cab

Discussion in 'Live Sound [BG]' started by ghanlon, Mar 18, 2014.

  1. ghanlon


    Jun 11, 2009
    Hi, I have an older Mesa Boogie 215 cab I am trying to identify Ohms for.

    It is a monster, has casters and a solid wood front that attaches with 4 latches. Looks like 2 15" EVs inside and 1 - 1/4" jack in the back.

    Pictures can be seen on my CL add.



  2. Thisguy


    Sep 28, 2013
    Abilene TX
    Being that it's an older Mesa Cab, and could have had speakers replaced or the cab could have been rewired, your best bet is to get an Ohm meter and check it. If the speakers have the impedance on them, you can figure out the impedance of the cab by seeing if the cab is wired series, parallel, or series parallel.
  3. MesaBoogie


    May 14, 2013
    Petaluma, California
    Customer Service/Product Specialist: Mesa Boogie
    They came in both 4 and 8 ohm versions (8 is standard). The best way to know for sure is plug in a cable and take a reading with a meter. GLWS. Thanks!
  4. ghanlon


    Jun 11, 2009
    Thanks, so it looks like I need to take it somewhere that has a meter.

    and to get at the speakers themselves to look I need to take the front grill off I am thinking. I have someone who may be interested in it but said only if it is 4 ohms.
  5. ghanlon


    Jun 11, 2009
    Also I was under the impression that this was called a Mesa Boogie Diesel Road ready cab.

    Is that correct?
  6. MesaBoogie


    May 14, 2013
    Petaluma, California
    Customer Service/Product Specialist: Mesa Boogie
    That is correct! Thanks!
  7. ghanlon


    Jun 11, 2009
    Thanks for the great info.
    I did a closer inspection today and removed grill and speakers to check for extra details.
    Here is what I found
    Both speakers look to be the same and stamped with


    815 9462 8910

    The cone has a stamp on it

    The bottom speaker has an EV stamped on front looks like someone colored it in with pen, the top one does not, but is stamped on the back.

    I have put all the images on my personal page found here

  8. When you measure the static resistance of the cabinet with an ohm meter, it will read slightly less than the nominal impedance. So around 6.5 or so is an 8 ohm nominal impedance, and around 3.5 or is a 4 ohm nominal impedance.