Combo Amps & Bypassing Internal Speaker(s)

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Electric I, Sep 24, 2006.

  1. Electric I

    Electric I Member

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    If you disconnect a combo amp's speaker & use an extension cab instead, how does it impact impedance & it's selector setting ?

    Is the internal/extension connectivity typically series or parallel ?
     
  2. mbratch

    mbratch Member

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    It really depends upon the amp. I had one that had two extension jacks. One was a totally independent 16 ohm extension, regardless of whether the internal was plugged in or not. The other was in parallel with the internal and required that the impedance switch be changed if it was hooked up. It wasn't clear whether the amp would be "happy" unplugging the internal speaker without looking at a schematic.
     
  3. Electric I

    Electric I Member

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    Thanks for the wisdom.

    My aim is to actually have the 10" speaker in a combo muted so I can use the 8 ohm ext. spkr jack with a 212 cab for more girth. And to possibly add an attenuator to the equation as well.
     
  4. donnyjaguar

    donnyjaguar Member

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    You can do this easily enough, ElectricI. If you need assistance let us know.
     
  5. Electric I

    Electric I Member

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    Thank you for that & will do, good sir.

    It's easy to see why this is the best guitar community on the net. Cheers.
     

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