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Cab Building Speaker Information

Discussion in 'Amps and Cabs [BG]' started by borden, Mar 21, 2006.


  1. Thanks for reading...

    Ok i plan to build a cab to plug with my amp. I Currently have
    2 x 10" 8 ohms speaker and 1 x 12 (unknown ohms). All speakers as new dating around 1970-1975 (Taken out of 1- Farfisa Organ 2- Kimball Organ)

    Questions are as follow :

    How can i know the OHMS of the 12" speaker..

    What wiring do you suggest to get maximum sound, cleanliness etc... i would appreciate suggestions as i don't quite know what to do now.

    Thank you for your help!
     
  2. greenboy

    greenboy

    Dec 18, 2000
    remote mountain cabin Montana
    greenboy designs: fEARful, bassic, dually, crazy88 etc
    Do you have trouble hitting the toilet too? ; }
     
  3. very instructive thank you
     
  4. Possibly a reference towards the fact this would be better serviced in the Amps section of this site.

    To your questions: you can figure out the DC resistance of your speaker with the simple use of a multimeter. The problem with this is that the DC resistance is different to a speaker's impedance (a function of a number things, probly most important being the frequency of the signal), which is a fair bit more difficult to measure.

    If you're planning to build a cab for these speakers there are a heck of a lot of things that you'll need to know before progressing further. You'll need to figure out or find the Thielle/Small parameters and then do the calculations to determine the appropriate size and port dimensions (if ported), or use a program to do the calculations.

    Josh D
     
  5. thanks, that gave me more then expected answers! :)
     
  6. LoveThatBass

    LoveThatBass

    Jun 28, 2004
    Borden, the DC resistance will be a little lower than the rated impedance of the speaker. i.e. 8 ohm will read about 6 ohms, 4 will read about 3 ohms etc.
     
  7. Ívar Þórólfsson

    Ívar Þórólfsson Mmmmmm... Supporting Member

    Apr 9, 2001
    Kopavogur, Iceland
    Indeed!

    Moved!
     

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